rpm shut off Topic is solved

[brad]

hello all , I have been having issues with my 96 850 turbo .
I have a check engine light on and the car rpms just cut out at 3.5 rpm, other than that it starts and sounds fine untill you try to drive it. I have checked the turbo and replaced the fuel pump and fuel pump regulator then this problem pops up. any ideas would be great im at a loss looks like I have ta hit the dealer $$$$$$$ that part I hate , but desperation is setting in. PS I did had an air leak in the top hose to the intercooler that tripped the check engine light, however will this problem effect the readings on a scope at the dealer or are they just gonna tell me to buy o2 sensors that know are good and charge me a hundred bucks for the scope ????? any input is greatly appreciated thanks BT

[potroast]

can you drive it at all? It sounds like it's fine as long as you're below 3500 RPM. If that is the case, it is easily in a drivable condition where you can get to Autozone/Kragen/Checkers/PepBoys to have them read your codes.

If you have a CEL, you have codes stored -- and that will give you a good starting point for finding the cause of your troubles.

[matthew1]

potroast has the right idea -- see what codes are getting set. Codes are invaluable in diagnosing problems.

[TheDrivenMan]

I'm having the same problem in my '95 850, but my check light was on for a year before I started having it cut out at 3,500

the fault code is PO444

Any ideas?

Robert in TN

[MadeInJapan]

The P0444 code is "Evap purge valve stuck open." This little valve with a hose running to it and one running out of it resides on your fan housing (driver's side) at the front of the car. I suspect it is bad and tripping an emissions code. Swap it out for a new one or one from a similar car (850's and first gen x70's) from a junk yard and see if that code goes away.