Good morning guys , i just bought a 1990 ls400 2 weeks ago ran like a champ
new tbelt,water pump,starter,plugs,wires ,new ecu sensor,coil, etc.. Just out of the
blues it almost die while stop at a red light. Now if i hit the gas it will suptter and smells
like gas, idle perfect, no misfire ,turns on perfect,trans shift perfect but i get code 34 already
changed the MAF same problem.
I know these is a old issue but i have read the forum i can't find anything else to do
please give me a hand to fix the problem i would hate to junk the car. Thanks

 

Did you swap it for another used MAF? or a rebuilt one? Perhaps the one you got is bad too?

Any other codes?

 

yes, it is very common for used '90-'94 AFM's (MAF) to be bad because many people mistakenly cleaned them with solvent or "MAF cleaner" over the years.

however, 34 is not a valid code for the engine, so could you download the codes again using this procedure?

 

I sure did tested 2 MAF but I did check the ohm and test the same on all .

 

OK thank you Sorry my mistake code 24 is the right one.

 

My next procedures to check will be the following.
- fuel pressure regulator
- fuel pulsation valve
- fuel pump
- ECU (send it to get check) even do there's no signs of melted capacitors or damage on the board.
Thank you guys for your help !!