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classic problem with reving RPM's

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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echase76
Posts: 105
Joined: 6 December 2011
Year and Model: 1998 v70 T5m
Location: State College, PA

Re: classic problem with reving RPM's

Post by echase76 »

Did you try Jumping the fuel pump relay? Did you bump of any wires while you were in around the throttle body? Did everything get plugged back?

Fuel, spark and air.

Have you checked for spark and fuel pressure at the rail shrader valve?

Just throwing out ideas. Hope you figure it out!
1998 V70 T5m Silver/Charcoal - 150K

Ozark Lee
MVS Moderator
Posts: 14798
Joined: 7 September 2006
Year and Model: Many Volvos
Location: USA Midwest
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Post by Ozark Lee »

If you have a garage to work on it in I can load up some tools and take a look with you. I'm over in Roeland Park.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

tridents65
Posts: 69
Joined: 31 March 2011
Year and Model: 1995 850, 2006 S-804
Location: Blue Springs MO

Post by tridents65 »

Wow - Ozark Lee I really appreciate the offer! But; IT RUNS! While my daughter had the car a few months ago (see old post) she had the same experience I did. I went back through those post a carefully read them again. This last time when it happened to me I tried the oil in the cyclinders and it did not work. So, when I read the old thread again it said that It may take a min. for the pressure to rebuild in the cyclinder. Today I did a compression check on all the cylinders while they were dry. Got 160 to 165 on all but #2. It was at 80. I put some oil in that cylinder and turned it over a little. Did the comprssion test again and it was at 180. Gave all the cylinders a good squirt of oil. Put all the plugs back in and cranked it over a few times. Vroooom! As a side note; the MAF sensor I put on from the junk yard also works! Lastly, I'm going to change the oil back from a synthetic to a regular oil. Thinking a 30 weight? Will also run some STP with it and will add STP every other oil change. Hopefully, this will keep the compression up. That and not starting/stopping the engine quickly (like I did) should work till money for an overhaul (out of my class) or another car. Thanks again Ozark Lee. Anything I can do for you just let me know.
1965 Chevy C-10
1954 Chevy BelAir
1949 Plymouth P-18
1995 Volvo 850
2006 Volvo S80
2004 Grand Prix

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