3.5 Stalling and rough starts

[phewop118]

Both Auroras started acting up today (4.0 overheating). The 3.5 gave some fits starting (in wouldn't stay running a few times). When it did start, Rpms seemed low. It stalled twice on the road while in motion.

Scanned it with my scan tool and zero codes. Tried monitoring MAF and MAP data and it all looks good. Could not duplicate the problem again after this afternoon. Should I start by cleaning the IAC valve? It seems to be symptomatic of either an airflow sensor (or airflow) issue or a fuel starvation problem. Suggestions?

[Paulaurora]

Most common issue with no codes for a while is Crank sensors on 3.5 is 2 in 1 unlike 4.0. they located behind the starter. If you were in NJ i would scan ur car with Tech2. Overheating might be bad thermostat.

[phewop118]

Already did the crank sensor about a year ago. Typically from what I've experienced with the 3.5, the stall or stutter occurs as the car is warming up, right as it reaches full operating temperature. This is occurring when the car is already at full operation temperature.

[Paulaurora]

When my mom had 2002 3.5 i had to change crank sensors 2x 1s time it lasted year in a half and started had to be changed 2x so not all parts last long even Ac delco.