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rich fuel mixture[ALL/1998] posted by mike on
Thursday, 8 May 1997, at 8:42 p.m.

I have a 81 240 d with b21f engine. Constant stalling, runs good at high speed, recent tune-up, wires rotor,cap,timing,plugs,did not help.Plugs and exhaust reveal rich fuel mixture. I suspect fuel distributor. Any suggestions??...



Re: rich fuel mixture[ALL/1998] posted by Brian T. on
Thursday, 8 May 1997, at 10:37 p.m.

Mike, Stay out of trouble with K-Jetronic by getting the fuel pressure readings. You need the correct gauge set-up to test the system pressure and control pressure. If you start swapping parts without this valuable data you can spend a fortune.---Brian

Re: rich fuel mixture[ALL/1998] posted by mark e. barron on
Monday, 12 May 1997, at 8:30 a.m.

I am not sure about the setup on your car, but if it is as I picture it, there is an "extra" fuel injector that is meant to work only at cold temperaturesfor a few seconds as cold enrichment . If this did not shut off it could explain rich running --- along with many other possibilities. I mention it because it would be so easy to check this possibility by simply disconnecting the lead to it. Mark

Re: rich fuel mixture[ALL/1998] posted by Brian T. on
Monday, 12 May 1997, at 9:20 p.m.

If the cold start injector is leaking, it will probably not be because there is power to it ---it will be a mechanical problem with the injector itself. You can remove the two allen bolts that hold it in, pull it out and see if it's dripping. You should have the fuel system pressurized (fuel pumps running) when you do this.---Brian

Re: rich fuel mixture[ALL/1998] posted by paul mohney on
Monday, 12 May 1997, at 9:48 p.m.

I'd like to know what you mean by running rich the fuekl metering systems in the new volvos(after 74 u.s. ) wererather nicely controlled by the ecu and friends, if you have a leaky injector, or injector seal. or if you have a manifold leak, the air mass meter meer goes psycho. iy you need a top end redo, itr will smoke, if your sensors are disconnected, or ill reading,the brain will make bad decisions, don't make things worse by disconnecting the cold start valve. if it is leking , it doesn't taker aphd to figure it out unscrew 2 (two screws ) and see if it gives up any gas if the ambient compartmrnt temp is over 68 degres. look this over and let us know, i usually check mail b/4 i go to work at 0400

paul in santa ana


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