340massive

I'm puzzle is it my ECU im located in texas hot weather state ive been noticing some erractic idle everytime i come to a stop the car feels like it wants to stall rpm goes up an down like something is going wrong very frustrating an ideas

RA40

iTrader: (6)

Have you attempted top read any error codes?

sha4000

iTrader: (1)

I was having this same issue the past coupe of days. I could not figure it out then I noticed I did not tighten up the screws on the air box that connects to the throttle body. Hopefully that's all it was but I'll have to wait until i drive it this evening. I say all that to state that maybe you have a vacuum leak or your throttle position sensor is going out unless you have some codes that say different.

340massive

How would you test a 1994 LS if there is no code?

340massive

Had my ECU repaired on my 94 LS400 239,000 miles got it back getting low idle symtoms cant figure out what to do next any ideas?

RA40

iTrader: (6)

Merged threads so that we have the symptoms in one thread to discuss.

How are the vacuum lines? Has the ECT been replaced?