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Please help me locate the source of my problem

Old Jun 1, 2006 | 02:02 PM
  #1  
91ChevyRS's Avatar
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Joined: Jul 2005
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Car: 1998 Volvo S70
Engine: B5254S Engine
Transmission: Automatic
Axle/Gears: It's a volvo?
Please help me locate the source of my problem

Agh, well here goes a shot for nothing.

Cammy has been driving just fine if not annoyingly at times. Some of the problems from the past still persist today including my misfire at idle (sometimes really bad misfire where the car barely stays on)

Anyway, I checked all the things that could lead to a possible misfire on my car. I pulled out the plug wires they looked fine, they may need some cleaning but if I clean them up they should do fine. I pulled out plug wire #7 to see if the car is misfiring the same as before. It was misfiring worse, so I plugged it back in and the idle went back to its old shakey self.

The most annoying, and I mean by far the most annoying thing that happens in this car, is when it shuts off randomly at stop lights. What it does, is that the car stumbles, shakes, and idles so bad, it never stays on for a long period of time. I can sort of tell when I start my car up for the day, I can see if the car is acting normal, or acting spazzy. When it acts spazzy (and its starting to become more frequent mind you) I shut the car off, then start it back up again and everything returns to normal.

When I am cruising around 55-60mph and I let off the gas to start of roll down the street, and then I sort of tap the gas pedal, there's no response for about a split second, the RPMs dont move, it felt as if the car was being chokced out of fuel for about a second. It sort of caught itself and went back to driving range.

I checked for codes, and I got a code 22 and a code 54....I had a code 22 in the past, and I went and got it replaced, just to make sure I wasn't screwing around, I took it out again got it tested and put it back in tight and securely. I never got a Code 54 before I don't think, and I believe that's my fuel pump relay switch or circuit or something like that.

I was wondering if this fuel pump circuit thing could be the problem as to why my car shuts off randomly at times and why it idles so bad.

The car never idles smooth, it always has a mild shake from a dead stop, I mean my friend's 79' Carb'd 350 idles a hell of alot smoother than my car does. I sort of grown used to it over the year, but if the problem can be fixed, I would love to fix it this weekend, or maybe even today.

Should I pull out my Ignition Module and get that tested? Or what else should I do? Please I need help fellow 3rd gens.
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Old Jun 1, 2006 | 06:11 PM
  #2  
five7kid's Avatar
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Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
What happens when you pull the other spark plug wires one at a time?

Sort of sounds like a stuck EGR valve to me, but I wouldn't swear to that. Code 54 baffles me, but I'm not all that familiar with the ins & outs of TBI.
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Old Jun 3, 2006 | 11:27 AM
  #3  
Rage789's Avatar
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Joined: Jan 2006
Posts: 23
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From: MI
Car: '85 El Camino SS
Engine: 305
Transmission: Turbo2
Axle/Gears: 3.42
Have you checked your fuel pump relay? Fuel Filter? Just a guess, I'm also fighting a code 54 in an engine that hasen't yet been run. I'm going to replace the relay today. I'll tell you if that clears it up.
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