1994 850 stalling while running then restarts w/in mins

douglasjreno · Post by **douglasjreno** » 01 Mar 2010, 14:45

Ok, here it is i have a 1994 850 non turbo. The car can be at any temp and or rpm or hot or cold and will just stop running. Then will restart within 2-3 mins sometimes even before i come to a complete stop. I have replaced the and chk'd the fuel relay and fuel pressure, have replaced the cam and crank sensors, still have the problem. It doesn't happen all the time or on a repetitive schedule. It is completely random. I have had it also with the cruise control on and off and while the cruise control was engaged. Any help here is appreciated.

Post by **jblackburn** » 01 Mar 2010, 14:54

Have you checked the battery & ground cables for a loose or corroded connection?

When it shuts off, will the engine still crank, but not fire again for a few minutes?

douglasjreno · Post by **douglasjreno** » 01 Mar 2010, 15:09

NOt a battery issue. Yes it will crank and sometimes refire on first try but usually not unless i wait 2-3 mins.

douglasjreno · Post by **douglasjreno** » 01 Mar 2010, 16:19

Also car has no problems starting ever. And there is no chk engine light when this happens.

Post by **jblackburn** » 01 Mar 2010, 23:12

Intermittent problems are the hardest to track down

I know these will sound like stupid questions considering what you've been through already, but must cover the basics. Which are that it essentially sounds like a fuel delivery problem rather than a spark issue.

You replcaed the relay...did you use a new or used part? When the car cuts off, and you turn the key off and back to position II, do you actually HEAR the fuel pump running?

If yes to that, I wonder if your fuel pressure regulator is flipping out.

douglasjreno · Post by **douglasjreno** » 02 Mar 2010, 09:39

I havent replaced it i tested it good, by jumpering it and got fuel pressure both ways. But still would not start right away. If that makes sense to you? Did to me. If you want you can call me to discuss just ask for my number if thats something you'd be interested in.

Post by **jblackburn** » 02 Mar 2010, 09:55

I may not have an opportunity to call you until after 8:00 tonight...bit of a busy day for me, but maybe you can run me through what you've checked if no one else responds with a "why didn't I think of that?!" solution before then! PM me your number and I'll give you a call if I have a chance

On a completely random tangent, does your coolant temp. gauge act normal? Does it stay right at the halfway mark while you're driving?

~Justin

Post by **jblackburn** » 02 Mar 2010, 16:42

The other possibility I didn't mention earlier would be a bad fuel injection relay. It's on the fan shroud just by the radiator. That could explain the not bogging down or not having any bad idle symptoms.

douglasjreno · Post by **douglasjreno** » 02 May 2010, 13:17

Okay now i seem to be experiencing a idle issue when i come to a stop with or without AC running, the idle will dip down to around 600 sometimes it stalls there sometimes it doesn't, any chance this is PCV issue?

Post by **phils94850** » 02 May 2010, 13:58

It could be a PCV issue, but, most of the time you may have a small vac leak but it shouldnt cause the car to die. Have you tried cleaning your MAF sensor ?