jaegmc99

My truck surges and will die at stop lights or when going from reverse to drive. It's been doing it for 3-4 months. I had to put in a fuel pump cause mine died, so it's not that. Thought it was the IAC so I replaced that. ran good and idled great for a day. Then started to surge at stop lights and die at idle. Now what? Change plug wires? coils? It has new plugs...uh help me!!!

00ChevyScott

iTrader: (10)

did you do the tune? post it up if you can, maybe the desired airflow is messed up?

dlt76028

iTrader: (13)

mine does this too quite often. i just cant seem to get the tune right?

00ChevyScott

iTrader: (10)

Mine does it too, but thats because my desired airflow isn't set right for the converter yet

dlt76028

iTrader: (13)

whats yours set at? i want to compare it to mine.

00ChevyScott

iTrader: (10)

pm sent.


Idk if i got a pic of the right table tho

EVILGMC

iTrader: (47)

check your TB for carbon buildup....even just a little will cause problems.

you can get a chemical cocktail from your dealer for doing a "de-carb"

dlt76028

iTrader: (13)

yours is higher then mine in some places and mine is higher then yours in some places... i was comparing my tune to other modified tunes with cams and stalls and their desired airflow is little higher then mine but theres a huge difference in the iac effective areas (iac steps) so im going to look into changing that...

silveradol33

iTrader: (30)

Have you checked the IAC? That seems to be a common problem, take it out clean it and try that. If that does not work, try a new one.

jaegmc99

I will take out the TB and full clean it out. I do have a 3800 converter. Maybe my tune is off. I'll clean it though and log it, then post here.