Stalling GN...The Saga continues!

[Pats-GN]

Well, i'm still getting a random stall only at highway speeds, it begins with backfiring, and flames out the exhaust. Usually temperature related, on warm days I can almost predict where it will happen, so i'm doubting its grounds, wiring etc. It always fires back up and clears within a couple minutes. Yesterday it died at 65mph, pulled over, fired it back up, it started to miss, and it was reving itself, like the ECM was trying to compensate the miss with more fuel. Good fuel pressure at all times, no codes. Heres the ongoing list of parts i've replaced with no change. MAF, ECM, Crank Sensor, Coil Pack, Module. I'm not sure what else to check. I believe it to be spark related, maybe the cam sensor? Any ideas appreciated.

 

[Russ Merritt]

My bet is the cam sensor. Maybe just out of adjustment. Possible bad cap on it.

 

[Mease Performance]

stalling

describe problem better,

which injectors? how old is the armstrong chip? stock MAF or LT1 with translator?

stock cam and rocker shafts?

 

[Pats-GN]

Thanks for the help guys, it usually stalls after 15-20min of steady driving. The hotter the temps outside the sooner it dies. On 90degree days it will quit in nearly the same place. It usually fires back up, but sometimes it wont, and takes 10min or so to get going. Its not as bad on cool days. It has an LS1 Maf with translator, this was added after problem began and made no change. Stock injectors, cam, rockers, etc. Have tried 3 different chips and 2 different ECM's, no change. I pulled the cam sensor cap off, and it looks ok but you know how that goes. It is set right, no play, just a little up and down play in the sensor. Thanks again.

pat

 

[Mease Performance]

problem

when it dies again check to see if there is spark