2001 Lexus IS300 won’t start fuel problems? - Lexus IS Forum
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post #1 of 18 (permalink) Old 06-10-2019, 11:04 PM Thread Starter
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2001 Lexus IS300 won’t start fuel problems?

I recently bought a 2001 Lexus IS300 not running as a project. A little history on the car, the head gasket went out so previous owner instead of replacing the head gasket replaced the whole head. I have replaced the fuel pump, fuel pump relay, coil packs, and oil, as well as flushed the fuel tank. The car still refuses to start, no security light, car just cranks over and over. My next replacement would be the ECM. So does anybody have any ideas what is going on with the car? I don’t think I’m getting fuel to the motor but I’m not exactly sure how to check. I don’t smell gas under the hood either. Any help would be greatly appreciated, thank you.
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post #2 of 18 (permalink) Old 06-11-2019, 12:49 PM
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Originally Posted by Blaike.mayer View Post
I recently bought a 2001 Lexus IS300 not running as a project. A little history on the car, the head gasket went out so previous owner instead of replacing the head gasket replaced the whole head. I have replaced the fuel pump, fuel pump relay, coil packs, and oil, as well as flushed the fuel tank. The car still refuses to start, no security light, car just cranks over and over. My next replacement would be the ECM. So does anybody have any ideas what is going on with the car? I donít think Iím getting fuel to the motor but Iím not exactly sure how to check. I donít smell gas under the hood either. Any help would be greatly appreciated, thank you.
Does it get spark?

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post #3 of 18 (permalink) Old 06-11-2019, 03:47 PM Thread Starter
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Originally Posted by Blaike.mayer View Post
I recently bought a 2001 Lexus IS300 not running as a project. A little history on the car, the head gasket went out so previous owner instead of replacing the head gasket replaced the whole head. I have replaced the fuel pump, fuel pump relay, coil packs, and oil, as well as flushed the fuel tank. The car still refuses to start, no security light, car just cranks over and over. My next replacement would be the ECM. So does anybody have any ideas what is going on with the car? I don’t think I’m getting fuel to the motor but I’m not exactly sure how to check. I don’t smell gas under the hood either. Any help would be greatly appreciated, thank you.
Does it get spark?
Yes after replacing the coil packs and wires it gets spark. It got spark before but I replaced the coil packs anyway.
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post #4 of 18 (permalink) Old 06-11-2019, 06:03 PM
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Yes after replacing the coil packs and wires it gets spark. It got spark before but I replaced the coil packs anyway.
Rent some injector noids at the auto parts store. That way you will know if it is a signal issue.

That being said, It then can be wiring, Ecu, fuse, relay, and Faultily sensor. But first try the noids.

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post #5 of 18 (permalink) Old 06-11-2019, 06:49 PM
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I cant remember, do these have a fuel pressure regulator on the fuel rail?

Have you done a full reset of the ECU? disconnect the battery, foot on the brake to discharge the system, wait 10 minutes and reconnect battery again. Can force the ECU to double check all the sensors and possibly give you some codes to examine.

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post #6 of 18 (permalink) Old 06-11-2019, 11:01 PM Thread Starter
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I have not tried it that way I was told to just disconnect the battery and wait ten minutes I tried that way but not the way you are suggesting.
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post #7 of 18 (permalink) Old 06-11-2019, 11:06 PM Thread Starter
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Yes they do have a fuel pressure regulator on the fuel rail. It looks like this.
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post #8 of 18 (permalink) Old 06-11-2019, 11:21 PM
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I have not tried it that way I was told to just disconnect the battery and wait ten minutes I tried that way but not the way you are suggesting.
Its close enough, the brake pedal just releases any power in the system saving the settings . . . so i have read. To be honest ive only ever pulled the battery like you, and that's been enough

My thoughts with the fuel regulator, you mention you thought there may not be fuel at the engine. I would be checking to make sure there is fuel to the fuel rail first, in case there was something wrong with the pump install, check the regulator is holding pressure correctly, then move onto the injectors as mentioned. No point trying to diagnose a non existent injector issue if something isn't right from when the pump was changed.

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post #9 of 18 (permalink) Old 06-11-2019, 11:32 PM
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I would be checking to make sure there is fuel to the fuel rail first, in case there was something wrong with the pump install...
Yes. Theres no test port on the rail, but at the very least, you can loosen the banjo bolt that holds the fuel line to the rail, and see if fuel is moving.
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post #10 of 18 (permalink) Old 06-12-2019, 04:16 PM Thread Starter
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I would be checking to make sure there is fuel to the fuel rail first, in case there was something wrong with the pump install...
Yes. Theres no test port on the rail, but at the very least, you can loosen the banjo bolt that holds the fuel line to the rail, and see if fuel is moving.
I will give it a shot, thanks I also replaced the igniter because I was getting a P1300 code and I have yet to check if it’s still there or not.
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post #11 of 18 (permalink) Old 06-12-2019, 05:22 PM Thread Starter
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Update: Is this supposed to be the crankshaft sensor?
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post #12 of 18 (permalink) Old 06-12-2019, 06:51 PM
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Update: Is this supposed to be the crankshaft sensor?
I can not tell by the picture. Where that is. Here is a pic of one.

https://lh4.googleusercontent.com/-D...0/IMAG1101.jpg

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post #13 of 18 (permalink) Old 06-12-2019, 07:54 PM Thread Starter
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Update: Is this supposed to be the crankshaft sensor?
I can not tell by the picture. Where that is. Here is a pic of one.

https://lh4.googleusercontent.com/-D...0/IMAG1101.jpg
It’s on the drivers side next to the oil filter.
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post #14 of 18 (permalink) Old 06-13-2019, 05:12 AM
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Itís on the drivers side next to the oil filter.
I think you are talking about the knock sensor. If I remember correct. Are you getting any codes?

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post #15 of 18 (permalink) Old 06-13-2019, 07:53 AM Thread Starter
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It’s on the drivers side next to the oil filter.
I think you are talking about the knock sensor. If I remember correct. Are you getting any codes?
Im not sure I have the throttle body off to replace the timing belt at the moment will update when I get it back together.
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