BIGTIME MISS-FIRING!! PLEASE HELP!! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-13-2004, 10:41 AM   #1
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Default BIGTIME MISS-FIRING!! PLEASE HELP!!

I HAVE A 95 BONNY SE...

SHE IS MISSFIRING BADLY. STARTED ON A TRIP THRU THE MOUNTAINS. I REPLACED ALL PLUGS/WIRES/IGNITION COILS...

THAT FIXED IT FOR A COUPLE WEEKS. THEN IT STARTED AGAIN.

NOW, WHEN I'M CRUISING DOWNHILL IT IS FINE, WHEN I HIT A HILL...IT CHUGS. IF I STEP ON IT, IT SEEMS TO STOP THE MISSING. I HAVE YET TO TAKE IT FOR A CODE READ BECAUSE I HAVE NO MONEY....

ANY SUGGESTIONS ON WHAT MAY BE THE PROBLEM. I CALLED MY OLD MECHANIC AND HE SAID MAYBE A CAM SENSOR ?

ANY HELP IS GREATLY APPRECIATED...
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Old 10-13-2004, 10:59 AM   #2
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I would first pull the codes.

How old is your fuel filter? Your engine could be fuel starved if it'* old.
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Old 10-13-2004, 11:00 AM   #3
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Welcome!!! First, cut off caps, second where are you from? and third, you might be around an area where we have members at that can assist you with a scan tool for you r car. Or just wait patiently for some assistence and other questions for your car.
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Old 10-13-2004, 04:24 PM   #4
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I'm in Winston-Salem, Nc...

Sorry about the caps, I'm at work (engineering). Can you get your codes read at like...autozone ?

Thanks
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Old 10-13-2004, 04:27 PM   #5
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Oh yeah...fuel filter is probably pretty old. I have never changed it personally because I could'nt find it ( I know, rear right wheel well )...still couldn't find it.

Also, I only have a 25 dollar ratchet set (just moved here).

Anyway, I forgot to say that when I did pull my plugs (which were old)...the two on the drivers side of the car....were oil-fouled. No idea if thats because it'* got 115k miles on it and it'* starting to go or what ?

Does that give any more insight as to what could be the problem ?

Thanks for all the help!!
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Old 10-13-2004, 07:35 PM   #6
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Quote:
Oh yeah...fuel filter is probably pretty old. I have never changed it personally because I could'nt find it ( I know, rear right wheel well )...still couldn't find it.
Try lookingfor it by the right front wheel well. It might be there by the right wheel.
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Old 10-14-2004, 06:21 PM   #7
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Ok...found and replaced the fuel filter. She seems to run a bit better. When I pulled the old one, I put it in a glass...and the fuel that came out of it was dark grey. There was also a lot of black residue left in the glass. I figured once I saw that, that the filter was my problem. Don't know now...maybe I have to drive it for awhile before the new filter will make a diff ?!

It has been just about 3000 miles since I changed the plugs and found them fouled. I will take them out and check...if they are, I am going to replace them again...and go get an oil change. Then I will keep track of the miles and check the oil again. I'll keep ya posted.

Thank yall for the help...
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Old 10-15-2004, 12:36 PM   #8
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I changed the plugs yesterday, and the one on your right (facing head on) towards the firewall...was oil fouled. Bad. It was also caked with nasty black stuff...

These plugs were under 2 months old!!!

i'm guessing this is going to be a major thing :(

Also, after changing to new plugs, I noticed little...if any...difference. Still chugs. Overall it'* a bit better w/ the new fuel filter and plugs...but still crap.

So far I've changed the plugs, wires, fuel & air filters, ignition coils...still running like complete crap. HELP!!!
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Old 10-15-2004, 04:07 PM   #9
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well...i have a camera/phone...but sometimes it will not send the pictures. I just moved down here and haven't switched my service...so it'* off an on. I will try to get you a pic though. It is nasty though, a ton of black crud. They were even bosch platinum 4x plugs...

It is a repeating problem (fouled plug). It'* always in that cylinder, and the plug is caked with junk after just a month of driving.

Also, a guy at my shop said something about a vaccume line (for the ruff idle, and chugging)...is that a possibility ?
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Old 10-15-2004, 04:13 PM   #10
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Vacuum line, yes. At least for my engine.. if I have a vacuum leak, the car won't idle for anything, but beyond idle you couldn't tell.

I think a compression test is in order for all your cylinders.. sounds like you may have a cracked ring or something bad in the bottom end of the engine.


-justin
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