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please help with hard cold starting and stalling 850 1996

posted by  someone claiming to be dave on  Wed Nov 28 12:04 CST 2001 [RELATED]

I have a 1996 850 T5 w/70K miles. When the car sits for several hours, it takes about 8-10 seconds of cranking before it starts. Engines spins fine so I am assuming the battery if OK. Also, sometimes it will stall when I roll to a stop within the first two minutes of operation. The car will start right back up and is fine. Otherwise runs perfectly. No codes to be pulled either. I recently replaced the plugs, wires, fuel filter, air filter and thermostat.

Another weird thing is that for the first 2 minutes of operation I get a groaning noise from the engine that goes up and down with the rpms. It's not a drivetrain issue becuase it will do it in park. I run 5/30 Mobil 1 synthetic so I don't believe my oil is too heavy at all.

What can I check? I just bought a house so I'm trying to avoid the dealer.

Thanks for your input.







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    Re: please help with hard cold starting and stalling 850 1996

    posted by  someone claiming to be Glen on  Wed Nov 28 12:28 CST 2001 [RELATED]

    I'd suggest having someone with a fuel pressure guage check your fuel pressure and rest pressure. Rest pressure is the pressure that the fuel system should hold (near normal fuel pressure) after you turn the key off. It shouldn't drop down to zero immediately after turning off the ignition.

    I believe your car has a fuel pressure regulator located on the injector rail. If so, after running the engine (warm eng), turn it off and remove the vacuum hose from its bottom side (facing downwards). If you see gas dripping from it, that's your problem. When those leak into the vacuum hose, gas gets sucked into the intake manifold and it'll start hard and chug, sometimes smoke as there's then way too much fuel entering the cylinders.







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    Re: please help with hard cold starting and stalling 850 1996

    posted by  someone claiming to be Gian on  Wed Nov 28 12:25 CST 2001 [RELATED]

    I know it "spins fine" but still how old is the battery? Are there any loose wires on the alternator?

    the next probable suspect would be the ignition coil I guess. There's also the question of the idle controls...






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