1996 850 turbo rough idle and stutter

Post by **rspi** » 20 Jul 2014, 07:29

Have you changed the ECT? Checked the wires on it?

Post by **steve850** » 20 Jul 2014, 14:03

Checked and cleaned the ETC when i had the head off, but yes, might be worth a double check

Post by **abscate** » 21 Jul 2014, 04:01

Have you fixed that vacuum leak? That could be the whole problem. You probably have more than one leak and they will mess up your running.

Post by **steve850** » 21 Jul 2014, 21:17

Fixed the vacuum leak, no change. Strange thing is i was messing around with different hoses checking things and accidentally left that hose disconnected, and the car behaves exactly the same. Hoping to pick up a coil tomorrow and try that. Running out of things to replace !

Post by **abscate** » 22 Jul 2014, 04:39

That's pointing you to another vacuum leak....somewhere.

Smoke test PCV

Fuel pressure regulator torn?

Post by **steve850** » 22 Jul 2014, 21:49

Put a new (used) coil on today, no change. Checked the ETC and found one lead disconnected, not sure that happened the other day when i was messing around with the vacuum hose on the end of the intake manifold...Anyway, starts and runs better when cold, or after sitting, idles better but only runs for about 10 seconds then dies. After five minutes of starting and stalling it won't start unless i pump the gas...if i push the revs up it cuts in and out. I'm starting to think fuel issues. The filter is new, the pump is about 3 years old. Could be the screen have picked up some crud or the pump won't hold pressure...? Am i correct in thinking that the proper fuel pressure at the rail is around 42 pounds? My guage only goes to 10 so i'll have to get another one to test...

Post by **steve850** » 03 Aug 2014, 22:02

Re the fuel pressure regulator - best test is what? It should just be leak free, i take it...

Post by **mecheng** » 04 Aug 2014, 08:41

Poor solder joints on fuel relay?

Post by **steve850** » 10 Aug 2014, 23:12

Found that whoever last changed the pump didn't replace the whole unit, just the pump. The in-tank hose was clamped below the metal hose, and not properly secured, so i expect half the fuel was not getting to the engine. Unfortunately, the metal lines on the outside of the pump were rusted and one of the broke while i was popping the lines off, so in goes a new one. We'll see what that does ... !

Post by **steve850** » 14 Aug 2014, 21:48

Smoke tested again today to double check, no leaks. Just got the fuel pump, hope to put it in tomorrow. If this doesn't do it...??

1996 850 turbo rough idle and stutter

Re: 1996 850 turbo rough idle and stutter