Ok i just picked up a 94 ls400 with 90,000 on the car but there is a issue with it. It has no power at all if i press the gas in it just boggs down with cel on. So i did some research on this site and it sounded like maybe i had clogged cats so i just gutted all 3 of them but nothing ,then i tried to pull some codes from the ecu and it would not work.
So i cleared the ecu by doing the pulling of the egi fuse and it drove fine idle was a little low but power was back 100% but after it warmed up for about 15-20 min it died and then i turned it back on and cel is on and no power again. So any help have you guys had this issue before and if so what was it? I am going to try to find a ecu to so if that helps. Thanks guys for any help.

 

Get the CEL reading and see what is the problem.

 

I tried to pull codes but no luck it just stays on and wont flash to get a code.

 

i hoped u followed the lexls method, www.lexls.com

 

yes that is what i used i found it on this site i searched before i posted this. I am going to try and switch out the ecu o2 censer and the coils and see if that works. But any other help would be great.

 

ur driver side ignition coil is also another culprit.

i have a perfectly working one for $30 shipped and paypaled..

once Trukn1 chimes in, he'll tell you lol, he had the same problem and it was the coil.

 

that's not diagnosing that's machine-gunning new parts into it and hoping.

did you actually try reading the codes?

 

Yes like i said i tried to get a code but it would no flash just stay on. I put the wire in te1 and e1 put car in neutral and turned of a/c and nothing . The car does seem like it is in limp mode and from what i gathered is a o2 can cause that but that does not tell me why i cant pull a code.
Plus in closed loop mode after i reset the ecu the car drove great so if it was a coil,spark wires or plugs you would think it would misfire or have some other issue .

 

so instead of replacing EVERYTHING that could be wrong with it, why not just try the ECU first....since that's the part most likely to be ****ed if you can't pull a code.

 

i got an 92 ECU.....

 

I dont think a 92 ecu will work with the my 94 the part numbers are not the same. or am i wrong?

 

ah yea it wont work, didnt read u had a 94.

 

Unplug your AFM and see if the car runs.

 

How very wrong you are since when my coils went up, I got no CEL, just low power and gas smell.

 

hey u shut up old man , i just remembered something about coils and no power lol and it was always ur thread.