chrly924s

My car very rarely gives any trouble that I can't diagnose and fix; it's usually something mechanical like leaks or cv joints. Stuff that tells you what is going bad. So, I very rarely post for help; 'search' usually provides the solution. However, last week it started dying at 1600 RPM. It will start right up and idle fine, but die when it hits 1600. Just shut off. No stumbling or back firing. It's intermitent too. I thought it might be something in the AFM so I swapped with a buddy-same problem. It's always at 1600 when it shuts off. Starts right back up and may or may not do it again. When it's running , you can stop and take off and it may or may not shut off. I've checked that ignition wires, intake hoses, fuel pressure, etc.
Any one ever had a similar problem or any suggestions?
Thanks

fast951

Did you check the TPS?

minho78

Like John pointed TPS.

Ky944TurboNewbie

I had a similar issue. It was very infrequent. Once or twice per 100 miles or so. More regular when engine was cold. I am not 100% certain it is related, but if I discovered while trying to fix problem #1, if I get on it, Overboost protection is triggered consistently somewhere near 4k or 5k rpm's and feels very similar. Engine just dies and you need to cycle the key. Hope yours is the TPS as I don't have a specific answer for you yet.

chrly924s

That was my 1st thought. Had one on my Cherokee that would only idle or run wide open. I'm going to check it w/an ohm meter when it dies and see what I get. Thanks

Turbo17

To chime in here: My '86 had very similar symptoms at 1500 RPM. It was the TPS.

relisysxx

Had the same problem with a Turbo I recently bought, turned out to be a blocked fuel filter, it would run fine at tickover but would'nt flow enough fuel when you revved it.

chrly924s

I put ohm meter on TPS and it checked out OK. This happens at any rpm when it shuts down, even way before boost onset. Then 1600 rpm is all it will do and idle.

Ronin-951

STILL sounds like the TPS, I wouldn't rule it out till I put an Eyeball on the Resistor Track, believe 'Clark's' has the rebuild info.

Bri Bro

Did you check both the resistance and the idle contact closure?

Rob

See if it will rev past 1600 with the TPS unplugged. Don't drive the car on boost with the TPS unplugged, but if it will rev past 1600 with it unplugged then the TPS is your problem

Turbo17

+1 on this. It can easily be intermittent.