HELP! possible ECU issue.
#1
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HELP! possible ECU issue.
When I start my 95' SC400 in the morning, I get a VERY strong gas smell and it stinks up the cabin as well. I have also noticed a slight knocking sound when it is cold(possibly bad valves), The gas smell goes away after the car warms up as does the knocking. Any ideas? if it is a bad ECU, where can I get a good replacement for cheap? Lexus told me $1500! and are there any preformance computers I could use in place? the car's TPS is acting up as well so I'm wondering if the computer just needs to be tweaked some. Thanks a lot!
#3
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Originally Posted by nasc300
mine did that just befor the HG let go completely
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When my ECU started going bad, when the engine was cold, like sat for 6hrs, when you started it up, it would run horribly rough, and run ultra rich. If you let it warm up for a few mins, it would run fine. It did that story for about 2 months, then started doing it all the time. I replaced everything, fuel injectors, compression test, fuel pump, mass air, bypassed fuel ecu.. and all it was.. was a bad ECU. It never thru a code or hinted it was bad, but i swapped it out for another one, the car ran perfect, all the time. Our ECU's go bad all the time, the caps tend to leak. Getting another used one is hit or miss, ppl never tell the truth. It took me buying 2 of em to get one that worked good. At least u can get em for $50-75 bux.
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#8
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well do you have any check engine lights on cause you may want to check those first second do a compression test on each cylinder, does not take much and you can find out if it is a head gasket or not. your going to have to pin point your problem and eliminate certain questions good luck though
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Originally Posted by AURELIOMK3
well do you have any check engine lights on cause you may want to check those first second do a compression test on each cylinder, does not take much and you can find out if it is a head gasket or not. your going to have to pin point your problem and eliminate certain questions good luck though
#10
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computer shortcircuit
When my ECU started going bad, when the engine was cold, like sat for 6hrs, when you started it up, it would run horribly rough, and run ultra rich. If you let it warm up for a few mins, it would run fine. It did that story for about 2 months, then started doing it all the time. I replaced everything, fuel injectors, compression test, fuel pump, mass air, bypassed fuel ecu.. and all it was.. was a bad ECU. It never thru a code or hinted it was bad, but i swapped it out for another one, the car ran perfect, all the time. Our ECU's go bad all the time, the caps tend to leak. Getting another used one is hit or miss, ppl never tell the truth. It took me buying 2 of em to get one that worked good. At least u can get em for $50-75 bux.
Also, I was looking on Ebay and the ECU for the 1UZ-FE (thats the 93 V8 SC400 right?) is like 120$.....where can you get it for cheaper and what do you have to be wary of when buying a recycled ECU
Dont hate, lol, Im a noob- any help would be much appreciated. thank you for your patience
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TRD- lexus told me the same thing.....1400 to replace the computer, im thinking about getting one off the internet and trying it myself....did you ever solve your problem?
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I got my car back from the shop today after the ECU rebuild...and it seems like theres something with the acceleration, i have to literally like FLOOR the pedal to get the engine over like 2500 RPMS, and ive started getting a strong smell of gas when i start the car/ move it out of P- but there are no leaks, no fluids underneath the car.....the other thing is this light just popped on the in the cluster, its right above where the 2 is on the tach (lol, forgive the crude description) and its like the outline of the car from overhead with these 3 lines pointing downward from each side of the back....i thought maybe it had to do with the brake lights but they seem to be working fine....any idea what the light indicates?
#14
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Hey I never did solve the problem because I just kinda gave up on the car, haha. Kinda funny because I found this thread of mine again today and now I am determined to replace the dang thing since it set off the gas alarm thingy in my house after starting it up. I'll let you know if I get to the bottom of this. Thanks, all!