2CarPros - Car Questions & Answers

GMC Other Repair Question


Topics covered: Engine, Rpm, Backfire.
Mileage: No information provided.

Asked on April 19, 2006

Weirdest stalling problem ever!!! (SOLVED!!!!)

1999 Chevy Tahoe, auto, 88K miles.

I've posted earlier with all the symptoms, but the question I need answered is this...

Tahoe will stall out on the freeway or at any speed, coast for 3-5 seconds, and then kick back on. No accessory lights, still have power steering and brakes, but car is just coasting with 0 RPM's. Then without warning, it kicks back on and backfires.

WHAT IS GOING ON?
Avatar Asked by naterzr2

Answer

Replied on April 19, 2006

i had a very similar problem with my 89 caddy. after putting it in the shop, it turned out that one of my grounds wasnt getting the connection that it needed, find you basic ground terminals and clean them real good and make sure they are securely tightened

Tiny Answered by jman1976
2 questions asked
Replied on April 20, 2006

I'll definately take a look into that.

But what is causing the car to start back up after it stalls for 5 seconds with the engine not running???

Tiny Response from naterzr2
2 questions asked
Replied on April 21, 2006

just like you can roll start a stick shift..... automatics can be started like that too, but at a much higher speed, your going down the highway and stall, keeping rpm's and still in drive, it will kickback in, engine is still turning which means its still getting fire

Tiny Answered by jman1976
2 questions asked

Replied on April 24, 2006

STALLING PROBLEM SOLVED!!!

CRANKSHAFT POSITION SENSOR.

AFTER SPENDING $3000 TO FIND THIS PROBLEM, IT WAS AN $80 PART.

FOUND THIS AFTER FIXED PROBLEM...

http://autos.msn.com/research/vip/Reliability.aspx?year=1999&make=Chevrolet&model=Tahoe

Tiny Response from naterzr2
2 questions asked