To start, last night the Bonneville was running fine, drove an hour to a concert, drove back like a champ. This morning I start it up to move it out of the way, and again to move into position to change a FCA really quick. After I finish up, I want to drive it down the road to feel the improvement in driving, but I only made it a short distance due to misfiring in the engine. I could tell before hand that that's what it was, but as I pulled back into the driveway the SES light started flashing and I could smell the fuel dumping into the cat and coming out the tailpipe. I have a scan tool for the car, but for some reason it wont connect to any OBD2 vehicle that I have ATM, so I cant get specific codes right now.
What I did find by observation though is that the cylinder 1 & 4 coil pack has a crack down the front/side of it, that's not all though, the coil pack was also slightly loose from the ICM, one of the bolts that holds it down wasn't cranked all the way. I tried to tighten it a little and loosen it, sure enough though, it broke. So now I feel like I need to pull the ICM off the car and try to drill out that small POS broken bolt from the bracket. I have a drill press and a nice vice, so Im hoping that when I drill it out, it catches and pushes the bolt all the way through. The unfortunate part is I believe that all of the bolts will break upon trying to remove them. Before I buy anything, I wanted to test the ICM to see if that is bad as well by moving the coils around, but I still suspect that the 1 & 4 coil is bad..... Time to blast it all with PB and let it sit I suppose. I have yet to pull the wires off that particular coil and see if I have spark at all, and FYI, I have new wires and plugs on the engine as recently as this spring, did em myself. I should also mention that I used a vice grip to hold the 1 & 4 coil solid to the ICM with no change in how the engine was running.
The main thing I need to know is where can I find the bolts that hold the coils down? Im guessing that they aren't a common bolt at the hardware store, so unless anyone knows otherwise, please enlighten me. Andrew (Haro), would you care to comment at all?
Cylinder misfire
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quicksilver
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Cylinder misfire
1995 Jeep Cherokee Country- 200,XXX miles and running strong. 4.0L paired with a 5 speed manual. 4.5" long arm lift with 32" tires and regeared to make up for power. Best of all, shes a fire engine red!
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
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quicksilver
- Posts like an LN3
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- Joined: Fri Dec 31, 2010 10:51 pm
- Year and Trim: 2000 SSEi: Black w/ 145,XXX miles
- Location: Sloansville, New York
Re: Cylinder misfire
Didn't take long, but I got my code scanner working, P0300: multiple cylinder misfire is what I got. It still runs like crap so I guess Ill try unplugging some wires to see what changes, if anything. Still need some info on the bolts if anyone has that knowledge.
1995 Jeep Cherokee Country- 200,XXX miles and running strong. 4.0L paired with a 5 speed manual. 4.5" long arm lift with 32" tires and regeared to make up for power. Best of all, shes a fire engine red!
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
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quicksilver
- Posts like an LN3
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- Joined: Fri Dec 31, 2010 10:51 pm
- Year and Trim: 2000 SSEi: Black w/ 145,XXX miles
- Location: Sloansville, New York
Re: Cylinder misfire
Unplugged the wires to cylinders 1 & 4, to no surprise there was no spark. Unplugged the wire to cylinder 5 and WOW was that an arc. To test it, I hooked up a jumper cable to ground and the other end to a screw driver, the same short distance for all posts on the coils to see what would happen.
Now I'm waiting for the pb blaster to work ts magic and hopefully tomorrow when I go to switch the coil packs around, the misfire follows the coil.
Also found out that the bolts is an M5×.8 thread pitch for anyone who cares. Hopefully the hardware store has something similar in size, if not the exact size I need. I'll tap it out if need be.
Now I'm waiting for the pb blaster to work ts magic and hopefully tomorrow when I go to switch the coil packs around, the misfire follows the coil.
Also found out that the bolts is an M5×.8 thread pitch for anyone who cares. Hopefully the hardware store has something similar in size, if not the exact size I need. I'll tap it out if need be.
1995 Jeep Cherokee Country- 200,XXX miles and running strong. 4.0L paired with a 5 speed manual. 4.5" long arm lift with 32" tires and regeared to make up for power. Best of all, shes a fire engine red!
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
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quicksilver
- Posts like an LN3
- Posts: 413
- Joined: Fri Dec 31, 2010 10:51 pm
- Year and Trim: 2000 SSEi: Black w/ 145,XXX miles
- Location: Sloansville, New York
Re: Cylinder misfire
I was able to remove those broken bolts from the ICM and move the coils around to see what's going on. Found that the misfire stays in place for cylinders 1 & 4, so much to my surprise, it seems like the ICM is the culprit in this case. Is there any other test I would need to perform to completely rule out anything else?
1995 Jeep Cherokee Country- 200,XXX miles and running strong. 4.0L paired with a 5 speed manual. 4.5" long arm lift with 32" tires and regeared to make up for power. Best of all, shes a fire engine red!
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
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mikeluscher159
- SSE Member
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- Year and Trim: 2002 Bonneville SLE
Re: Cylinder misfire
Swap coils around to see if the problem moves with it
Any bad corrosion under the ICM?
Any bad corrosion under the ICM?
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quicksilver
- Posts like an LN3
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- Joined: Fri Dec 31, 2010 10:51 pm
- Year and Trim: 2000 SSEi: Black w/ 145,XXX miles
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Re: Cylinder misfire
Already swapped the coils, it seems to be the ICM, already ordered an acDelco from rockauto, should be here tomorrow, so hopefully when I plug it in, it'll work.
I already cleaned the two contact pins for the coils t see if it would help, nothing happened. The plug connector also looked fine as well. Being that 2 of the 3 coils are firing, I would say it's the ICM.
I already cleaned the two contact pins for the coils t see if it would help, nothing happened. The plug connector also looked fine as well. Being that 2 of the 3 coils are firing, I would say it's the ICM.
1995 Jeep Cherokee Country- 200,XXX miles and running strong. 4.0L paired with a 5 speed manual. 4.5" long arm lift with 32" tires and regeared to make up for power. Best of all, shes a fire engine red!
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
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quicksilver
- Posts like an LN3
- Posts: 413
- Joined: Fri Dec 31, 2010 10:51 pm
- Year and Trim: 2000 SSEi: Black w/ 145,XXX miles
- Location: Sloansville, New York
Re: Cylinder misfire
Got the new ICM today, installed after work, problem solved.
Thank you Mike for your reply, one of many who have viewed this thread. Thankfully it was only the ICM this time.
Thank you Mike for your reply, one of many who have viewed this thread. Thankfully it was only the ICM this time.
1995 Jeep Cherokee Country- 200,XXX miles and running strong. 4.0L paired with a 5 speed manual. 4.5" long arm lift with 32" tires and regeared to make up for power. Best of all, shes a fire engine red!
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.
2000 Bonneville SSEi- 145,XXX miles, bonestock for the time (don't hold your breath, it might be a long while)
Typos courtesy of LG Optimus G- yes, I do most of my trolling with my phone. Don't judge me.