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240 Hard Cold Starting - Checked usual suspects! 200 1988

posted by  someone claiming to be Alex Z on  Fri Feb 24 04:33 CST 2006 [RELATED]

Hi guys,

I have an '88 245 fitted with a B200E engine (which has K-Jet fuel injection, no AMM, no catalytic convertor and no O2 sensor).

I have a continued cold start problem. The car will often take 5+ seconds to start, and will almost stall (it sounds like it is running on 3 cylinders!) for 5-10 seconds, then the idle will hop back up to 900rpm and all will be fine.

This only happens 50% of the time when cold, and never when the engine is warm.

The car is regularly maintained by myself, and I have recently checked these specific items (upon guidance recieved by reading other posts):

Auxilary Air Valve
Cold Start Valve
Injector Seals
Air Filter
Fuel Filter
Visually checked for any vacuum leaks

Where do I go from here?

I see mentions of fuel pump & 'check valve' problems - how could I go about specifically troubleshooting these? When I turn the key to Position II (without starting the car) I could swear that I used to hear a brief whirring of what I assume was the fuel pump, but I do not anymore.

Many thanks in advance!!

Alex







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    240 Hard Cold Starting - Checked usual suspects! 200 1988

    posted by  Aye Roll on  Fri Feb 24 07:32 CST 2006
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Tue Oct 14 21:08 CST 2014
    [RELATED]

    I only know what the US model cars do in these circumstances, and a US 88 Volvo is LH-Jetronic 2.2 for the fuel system.
    They do not prime the pump. I *think* your car should prime the pump, as most of the K-Jet cars including the Turbo we just sold do that.

    A fuel pressure test would show you for sure. These cars require some kind of in-line fuel pressure tester, since there's no convenient T or valve to plug a tester into. A junkyard set of fittings from the fuel rail, connected to a small pipe "T" and a pressure gauge (good for 100psi or so) does the job the best way.

    Another thing that could be failing is the fuel pressure regulator, which I assume this car has- to control maximum system pressure and return fuel to the tank. Again the pressure test would show whether that's at fault.

    I'd bet on the check valve, which is screwed into the end of the fuel pump, but it's certainly not the only thing which can cause this.

    Good luck!
    --
    Rob Bareiss, New London CT ::: Roterande Flakt Och Drivremmar!







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