Lexus IS Forum banner
1 - 20 of 25 Posts

·
Premium Member
Joined
·
13,765 Posts
Discussion Starter · #1 ·
As some of you may have experienced problems like acceleration lag after anything resembling a sharp turn and something that can be described as being popped into nuetral while driving, have you had anything else weird/unsual happen that you might attribute to the trac/ecu problem?

The reason I ask is because I have been having quite a few things happen that have scared the living daylights out of me, that could have caused accidents, some I have been able to side step around, like the car refusing to accelerate after any sharp turn (not even speeding, mind you) so I just take turns slow and wait until I have plenty of space between oncoming cars, or avoid the more notorius turns entirely, but there have a few things that seem to have no rhyme or reason and would happen out of nowhere.

Things like; I was driving behind my friend, on a straight road, and we are coming up on a stop sign, so I reduce my speed, applying the brakes to slow down to a smooth stop, and when I eased up on the brake pedal even a little bit, the car jerked forward as if I had stepped on the gas, and, although I have big feet, I know I was nowhere near my gas pedal. I press the brake pedal back down and the car seems to slow down again, and I'm at a complete stop. It's a stop sign controlled intersection, so my buddy in front of me continues after stopping, and I off the brake to pull up to the white line, as soon as I take my foot off the brake pedal, the car lurched forward like it was a stick shift in the hands of an inexperienced driver, it totally catches me by surprise and I almost rear end my friend, so I stand on the brake and the car shudders like it wants to speed up, like you're about to stall out in a stickshift and the car gets into gear and goes... This was the first time it happened, and it didn't happen again that night, so I passed it off as a fluke. Then a few weeks later, as I was slowing down to a stop to make a left hand turn into my friends neighborhood, the car does this again right as I ease off the brake to make the turn the car lurches and I almost hit the corner curb which has a concrete gate. The street that I am turning into has a decent sized dip, so of course I'm not going to plow through it, and I almost hit the curb/gate but I managed to stand on the brake and pull left enough to barely get away with nothing more than a scraped front (the black mudflap looking thing infront of the front wheels), but that scared the living daylights out of me. This is before trac/ecu fixes being available, and I know how dealerships have no clue about it, and didn't take it to the dealer demanding a fix that I knew they didn't have for a problem that they probably didn't know about, and I had already reported a few problems that I was unable to reproduce, and this was something I cannot reproduce, so I decided not to waste my time or theirs and risk me being the boy who cried wolf. This problem happened to me at night both times.

Then there are times when I accelerate, like on a freeway on ramp, and the car would just act like it was in neutral, rev up and all of a sudden jump and push me back into my seat, and go way faster than I was trying to accelerate to (10-20mph or so over) which hasn't really put me in any danger because all I have to do is eshift into 4th or give it a little brake action to slow down a little and keep with the flow of traffic. Sometimes I'd be at a light and from a complete stop I'd start off at a decent rate of acceleration, not engine blaring or pedal to the metal, and then after 30mph the engine would roar, then squat and act like I had floored it, I have been able to keep this in check by taking my foot off the gas as I near the speed limit or the flow of traffic, and the car would behave normally a few seconds later, provided that I didn't touch the gas.

Yesterday was the worst. I had just made a right turn and was driving on Victoria, which is a straight two lane road for awhile that goes into a mildly windy road that
 

·
Premium Member
Joined
·
13,765 Posts
Discussion Starter · #2 ·
I was going to make an appointment to get my 15k mi service/oil change, have my headlight replaced (condensation, driver side) as well as have them check my door pin (keeps coming out) cracked leather seats and ECU/TRAC fix all at the same time for next Friday, due to finals and employment problems this last three weeks, but it looks like I'll have to go on Monday or Tuesday, if they dealership isn't open on Memorial day. So I won't have a car for at least 3 days. Damn this sucks, I have the worse of luck.
 

·
Registered
Joined
·
1,698 Posts
I had my passenger side headlamp replaced because of it fogging up too. But I noticed that the brightness of the light doesn't seem as blueish clear as the other headlamp. It actually looks like the color of a regular bulb. Can a regular non-HID bulbs be fitted into our headlamps? I hope the dealership didn't mess up.
 

·
Registered
Joined
·
2,102 Posts
Sheesh, Thanh. Sorry to hear about that.


Hope things get resolved through your dealership. I'm hearing more and more that the ecu/trac fix is being rolled out at several dealerships in the california area (a recent post said my dealership in pleasanton should be ready later this week).

The brake/accelerator problem seems really weird though! I've noticed on my previous car (Honda Accord) that sometimes the engine would surge (tach needle jumps and engine revs a little) when I pushed the brake harder than usual, and sometimes could be repeated if I pump the brakes after a dead stop. Some sort of connection there, but never figured out exactly what.

I do know that the issue with the is300 slowing way-the-heck-down on sharper turns is intentional with trac on cuz I think the program actually cuts gas flow through the injectors when it notices wheel slippage. But I've gotta admit, it's a little too safe for its own good (or so it seems).

Keep us posted on how things work out. At least you had some honeys in the car with you during the whole ordeal
 

·
Registered
Joined
·
796 Posts
DonCor, the issues w/the throttle and the transmission will be resolved w/the ECU reprogram. Ask your dealer to do this ASAP even if they don't have the TRAC module replacement.

The only issues that I have ever experienced prior to the reprogram/replacement were:

1. Hesitation. I slowly decelerate to 5 mph, and then get back on the gas. The car takes about a second for the engine/tranny to respond, and when it does it jerks forward. (This is w/TRAC off and in either D or M.) The reprogram has reduced the response time to what I would expect on other automotic cars.

2. Transmission dropping out of gear. During the Glendora Ridge drive, I was running with a modded Celica GT-S through a series of esses, using aggressive drop-throttle and on-throttle to point the car around. (TRAC off, D, Power.) Suddenly the tranny dropped out of gear. The engine revved to the sky, and the car behaved as if I had just shifted to neutral. I got off the throttle and coasted for a whole two seconds (while everyone behind me braked hard, unaware of why I was suddenly slowing), got back on the throttle and found that the tranny had returned to the right gear. This is a singular instance, and I have not had that problem recur at all.

The misbehaviour of your throttle is really strange indeed. I wished I could have checked it out during the recent meets. Anyways, you have my sympathy for your misfortune. Eating a ticket is one thing, eating one when it isn't your fault is another.
 

·
Moderator
Joined
·
2,883 Posts
Geez I can't beleive what I am reading. I have only had small run ins with these problems.

First, I was making a left in an intersection and had to get the hell out of the middle cause the jerk behind me didn't seem to give a [email protected]# if I needed to wait and see if the car coming from the opposite direction was going to run the light or not. It happens so much here in Miami, that I'll wait instead of taking a chance I might regret. So, I step on it and the engine revved but no movement for about a second then it took off roaring. Second, I do seem to notice slight acceleration problems from the TRAC being on. I now only use it when the roads are damp or wet of course. After taking my car to an autocross with TRAC off I feel confident the car wont fishtail on dry pavement. I had it on for one of my runs and noticed the acceleration lagging. I asked a guy with his 328 how his TRAC reacts for him he did not mention anything like I did. Oh well I will be getting my fixes on June 12th so I'll be sure to post my experiences with the fixes. Good luck all of you.
 

·
Registered
Joined
·
132 Posts
I've had the normal acceleration hesitation problems that everyone describes here. At my 15K I hope to get my ECU replaced.

But the "unintended acceleration" experience (shades of the Audi 5000) brought back memories of my IS300 test drive last August. During that test drive I was using the e-shift and the car would not slow down no matter what I did. The car would only downshift to a certain point because of the rev limiter.

So there I was with salesman in the seat next to me and a buddy in the back screaming down Pines Blvd going 60 in a 45 with the engine turning super high rpms. Of course I thought I was doing something wrong, as I had never used an e-shift before. The salesman was selling the car and telling me to listen to the sound of engine. I'm telling him that the damn thing isn't stopping and I'm literally standing on the brakes. When I did take my foot off the brakes, the car wanted to take off like I had the gas pedal floored.

We get lucky and hit greens though a couple lights before starting to get on I-75. At that point, the salesman realizes I'm really having problems getting the thing to slow down so he reaches over and turns off the ignition. The car coasts over to the side of the entrance ramp. We all jump out and the smell of burnt rotors hangs heavily in the air.

Of course, the problem can't be duplicated by the salesman once he takes over....I look like a numb nuts.

To this day, I dont know what happened out there. All I do know is that car was not stopping despite full-on brakes. And, yeah, I was on the brakes and not the gas pedal...

I'm just wondering who got that white IS???
 

·
Moderator
Joined
·
2,883 Posts
Hi accelr8 that is a freaky story, I guess you wanted the car as much as I did that the experience that happened to you didnt turn you away. Also hearing that story scares me if something like this happens on the road, and we are considered at fault how the hell can we prove the car was at fault in court!?
 

·
Registered
Joined
·
3,355 Posts
Yeah i ahd the same problems initally with my IS200.. about the car unable to brake and wants to charge forward.. acceleration lag is still around... but a new problem is the extra power light coming on.
this is what I wrote in IS200 forum:

Ok this happened last week.. i was driving at a snails pace during peak hour traffic and suddenly the extra paower light on the dash starts flashing... the button was not pressed or anything. I pressed the button several times but still it won't go away.... the next day i took it to Lexus to check it out. .they said the car had overheated or something along those lines... and about me pushing it too hard...

well if the car can't handle 20km/h traffic.. i must've killed it a few weeks back when i was dragging the car.. I wonder if the IS200 can't really be pushed too hard.. if i do what's gonna happen next?
 

·
Registered
Joined
·
6,152 Posts
those are some weird and scary problems...but i do have a suggestion for you...instead of standing on the brakes and fiddling around w/ the eshifter why not just put the shifter (the actual stick) in neutral? the engine can then rev all it wants but it won't make you go speeding like a maniac down the road.
 

·
Registered
Joined
·
132 Posts
Well, at the time, I was so wrapped up in test driving the IS I guess I really wasn't thinking that it was the cars fault....I was wondering whether it was something I was doing. Putting it in nuetral may have crossed my mind but wouldn't that have redlined the engine? I'm thinking had I done that I would have been buying THAT car, if you know what I mean.

Jigga: Like you, I really wanted an IS and figured there was something wrong with this particular car.

I haven't had any problems at all like that with my IS.
 

·
Registered
Joined
·
226 Posts
Hey Dong, sorry to hear about your problems. Last time you got into an accident you got rear-ended right? Are there any sensors or other important electronic equip back there that might have been damaged? If you have the shop manual, take a look. In my old school Rx7, we had some traction control stuff back there.

Just a thought...check your cruise control settings, make sure there're off..and check your battery's ground...remove your engine cover plate and check all wiring for rodent damage.
 

·
Registered
Joined
·
148 Posts
Thanh, sorry to hear about your latest misadventure with Antoinette. You do seem to have more than your fair share of problems and trouble with your IS. Maybe time to get rid of it and have your troubles go away? At least nobody's gotten hurt yet. Nothing like your acceleration problem has happened to me, just the usual annoying hesitation.

While the CHP guy may not have been sympathetic, maybe a judge will be, so I hope that you plan to fight this ticket, or at least ask for traffic school. Keep good documentation on the ECU fix, and you may wish to register a complaint with NHTSA. If nothing else, it may help your case that it was the car's fault, and not yours. Good luck.
 

·
Premium Member
Joined
·
13,765 Posts
Discussion Starter · #14 ·
just got back from the dealership. too scared to drive it all weekend, had them tow it in. they are going to flash my ecu thursday, they couldn't reproduce the acceleration (of course) and I had them set me up an oil change for the same day, they ordered me a new headlight, anywhere from a week to a month, they'll look at my door pin, and they didn't see any cracking leather. sigh. took a road test, car seemed ok, hesitantly drove home, I'm tired.

my salesguy left awhile back, and now I find out the general manager, nicest gent you'd ever met, class act all around- retired, so the only ppl there I know are the service consultants and the salesman who replaced my old one. Hope I don't get shafted in the future.
 

·
Registered
Joined
·
148 Posts
Thanh, I did the written declaration deal a long time ago, around 1988 when the CHP caught me doing about 70 on Interstate 5. This was back when the maximum speed limit was 55. I admitted doing 70, but I said I did that because I was passing a long line of trucks and it was really, really windy.
The judge didn't let me off the hook, but he reduced the fine from about $75 to $40. This was back in the days when fines were really low. I would think that one advantage of doing a written declaration is that you can produce lots of evidence or provide detailed explanations. The advantage of showing up in court is that if the cop doesn't show up, the case is dropped. With your predicament of a prior conviction for doing 100+ mph, maybe it's time to consult with a lawyer again, even though it didn't help last time. As you mentioned, you may be close to losing your license or getting dropped by your insurance company.
 

·
Registered
Joined
·
4 Posts
On November 11th, 2001 I experienced a terrifying and potentially life-threatening incident with my car. On that evening, I was approaching a stop sign at a busy intersection, and when I pressed on the brake the car wouldn’t stop and instead a sudden acceleration forced me into the middle of the intersection. I was able to stop the vehicle by using the emergency brake. Since this has never happened before, I thought it was an isolated incident, so I continued to drive the vehicle. It seemed to be operating properly for the next week or so, when it occurred again. On the evening of November 21st, 2001 I was dropping a friend off at home when I proceeded into a parking space. As I pulled forward, out of nowhere, a sudden acceleration occurred and forced the car over the curb and up a hill. The passenger in my car pulled on the emergency brake and was able to stop the car. Another witness saw the rear tires spinning as the car took off over the curb and up the hill. Obviously there are some serious problems with this car.

§ On November 27th, 2001 the car was towed to Pohanka Lexus for repair.
§ On November 28th, 2001 I received a message at home (checked them while I was away) that stated I could pick up my car. No repairs necessary. They “claimed” it might have been from floor mats moving. This isn’t possible since the floor mats are kept in place by a hook.
§ On November 29th, 2001 I received yet another message stating that I could pick up my car -- there's nothing wrong with it.
§ On December 3rd, 2001 I made several calls to the dealership and spoke with Lee (tech), Kevin (Service Manager) and Hawkeye (Head Service Tech who worked on my car).
Telephone Conversations that occurred on December 3rd, 2001:
· I first spoke with Lee and he informed me that there was nothing wrong with the car and that I could pick it up. I told him there was NO WAY the problem occurred because of the floor mats. That’s when I proceeded to speak with Kevin, the Service Manager.
· I spoke with Kevin and explained the entire situation to him. I asked that they check the alignment and undercarriage to make sure there wasn’t any additional damage to the vehicle when it jumped the curb. I also asked if there was a sensor/chip that controls the accelerator and he said yes. I informed him that due to the serious sudden acceleration issues I was having with the car that it is deemed unsafe and that I would not be picking it up. I also asked that I receive a loaner car and he informed me that there weren’t any available. He said he would do everything in his power to get me one as soon as possible. Please note that I have always been treated very well by the Service Department at Pohanka Lexus, namely Kevin ______. Kevin is always pleasant and extremely professional
· Then I called back and spoke with Hawkeye, the Lead Technician who worked on my car. I told him exactly what was happening with the car and asked what he had done to replicate the issue I was having. He informed me that he had driven the car approximately 10 miles and didn’t find any issues. I calmly explained that I would not be driving the car and that in my mind it is deemed extremely unsafe. He asked permission to drive the car overnight and I agreed and also told him that he needed to drive the car as much as possible to see if the sudden acceleration occurs again. I also asked him to check for any damage that may have occurred when the car jumped the curb as well as the alignment. He assured me that this would be done.

§ On December 4th, 2001 I called the dealership more than a half a dozen times and finally spoke with Kevin. He noted that the car had been driven approximately 60 miles and they still weren’t able to replicate the problem. He asked that I give Lexus Customer Service a call to open a claim.

The Service Department as well as Toyota (Corporate offices) has determined that the car is SAFE and can be picked up. They refuse to give me a loaner or pay for a rental car since they are unable to replicate the problem.

As of December 6th the car sits at the dealership until this issue can be resolved.
 

·
Podiatrist
Joined
·
22,260 Posts
Man!!!

On the freeway, my car sort of jumps into gear, but I've never heard of it going on it's own...

Gonna check with the dealership.
 

·
Registered
Joined
·
4 Posts
Read DonCorleone's posts earlier... he has had the same problem. There was another person who had this problem while doing a test drive as well.

<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 ALIGN=CENTER WIDTH=85%><TR><TD COLSPAN=2><font size=-1>Quote:</font><HR></TD></TR><TR><TD> </TD><TD><FONT SIZE=-1>
On 2001-12-06 14:28, SophieSleeps wrote:
Man!!!

On the freeway, my car sort of jumps into gear, but I've never heard of it going on it's own...

Gonna check with the dealership.

</FONT></TD></TR><TR><TD COLSPAN=2><HR></TD></TR></TABLE>
 
1 - 20 of 25 Posts
Top