hey guys so my car is f*cked right now. Maybe someone can tell me why....anyway i sent my ecu to jwt to get done, so my car sat for about 5 weeks(its also been real cold here latly) anyway i jus put the ecu u in and the car didnt start. ok so no suprise there because its been real cold....well i finally got the car started and it now as a really rough idle. also the air/fuel shows im running really rich. so i went to the gas station to put new gas in the car
well that was yesterday and today the car once again doesn't start(all the time) like some times it starts jus fine but MOST of the time when i go to start the car....it turns over jus fine then sputters a little bit then jus dies. The car will do the sputter die maybe 3 out of 5 time i try to start it.
Any ideas?!

 

my guess is that it's the ECU

 

weird. i would call and tell jwt. i mean that would be the thing i would think. a car sits for 5weeks and nothing should go wrong with it. somethng just ain't right.

 

i was thnking ecu also....but when the car does turn on everything is fine and runs well.
i should throw out there that i didnt, the car has close to 200,000 and is in need of a tune up....but still i have never had the car act like this before.

 

well im gonna get the tune up and check for other things that could be wrong on tuesday....i'll post if we find anything, jus in case this happens to someone else

 

Why did it sit for so long? What was the turnaround time for the ecu?

 

Sometimes when you install a new computer, it takes time for it to learn about all the sensors.

This happens with Audis/VWs a lot when the batteries die. I checked the Haynes manual for Maximas and it says something of the sort under the Emission section, Computer code retrieval.

I know in the audis it takes about 35-50 starts to get everything working and the ECU to complete it's "learning" mode.

It might not be a bad ECU after all. Did you contact JWT? I'm sure they'll say something similar.