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1995 940t wagon Running poorly the 1st few min. when cold

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
1997 - 1998 V90/S90

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earlfleetwood
Posts: 5
Joined: 6 October 2014
Year and Model: 1995 940T
Location: Lockport, NY

1995 940t wagon Running poorly the 1st few min. when cold

Post by earlfleetwood »

OK, I have previously posted about having too much oil in my crankcase after a normal oil fill. I thought it might be coolant, but someone posted it may be gasoline. I am starting to think that might be correct. Now with the temps getting down into the 40's in the am, the car runs rough for the first 2 to 3 minutes after 1st starting. Slight idle hunt, and I mean slight, and runs rough, almost like a miss. Not sure what to check. For the 1st problem, I would assume that it would be a leaking injector, but how to find which on? 2nd problem, I would assume MAF, but when I had problems with my saabs in the past, the hunt was pronounced and the car ran fine otherwise. Any help appreciated. Starting to regret buying this car.

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93Regina
Posts: 2813
Joined: 18 January 2014
Year and Model: 93:240/940
Location: Sunflower State
Been thanked: 65 times

Post by 93Regina »

earlfleetwood wrote:leaking injector
When engine is cold, just cycle key switch several times so fuel pump is engaged. Then, remove all spark plugs, and smell them.

Or, get a fuel pressure gauge, and hook it to the fuel rail, then cycle key switch once...does rail hold pressure.

If oil is rising with gasoline, the oil must be changed, and problem fixed.

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