WOTDSM
15+ Year Contributor
- 167
- 0
- Dec 3, 2006
-
Detroit,
Michigan
I was driving home from work today (I let the car warm up to operating temp before I pulled out). I pulled on to the street and went WOT. Once I hit about 3k it felt like I was having spark blowout. So I pulled over, car was bucking, missing, and stalled. Restarted and it sounded like I had no compression. Somehow it started and started firing on all cylinders and idling fine. Drove around the street I pulled over on and it was running fine. Went to pull out and again the same thing happened. Pulled over, restart (again it sounds like I lost compression), runs like crap for a minute and then smooths out. So I limp it home. Any time I would give it more than say 25% throttle it would cut out and I would have to limp it for a minute till it smoothed out.
At this point I thought I jumped timing. Pulled the upper cover off, everything lines up (sweet!).
Pulled the plugs. #1 looks like it had knocked to death which I don't understand because I have link set to show me when there is 2* of knock retard and I rarely beat on the car (however, yesterday I was doing some "spirited driving" and I logged 11.8:1 afr up top (YIKES!) but only 1.8* of knock retard). I also saw what looked to be some metal debris on the top of the piston (UGH). #2 and #3 looked OKAY. A little black and grey. #4 is the one that scares the shit out of me. Pulled it, it's covered in oil. Not the treads, but the electrode... It doesn't look too bad in the pic but I had wiped it off
So, my guess right now is that #4 piston ring land is cracked from the lean pull I was doing. But I honestly have no idea. My buddy is coming over tonight so we can do a comp test. It's not smoking though which is confusing.
Does anyone have any ideas to share? Thanks. I'm real upset that this JDM EVO 1 engine failed...
This is my daily driver too so it's extra crummy.
I've attached a log that I trimmed down. The bucking and missing is at the beginning when the RPM looks way out of whack. I've also attached some pics of the plugs.
***UPDATE***
Compression test was good. Done on a cold engine (hence the lower reading), all plugs out, really just looking for major differences in cylinders (50+ PSI)
150-135-155-120
I am wondering if I just fouled the plugs... I've been running BPR8ES to help keep knock levels down. Perhaps the fast crank was caused by the engine being warm and stalling right before I cranked it? Oil pressure already high, everything at temperature=less resistance when cranking? Also, the seals on the plug wells must have been a factor, causing the engine to misfire, and leading to number four plug being wet.
*******UPDATE NUMBER 2******
Everything is A-OKAY.
The fast crank must have been caused by the warm engine because it sounds 100% normal now.
I cleaned the plugs and she runs like a champ. I still need to do the valve stem seals because I feel like those could be on their way out. Plus the spark plug seals are shot.
SO happy that it wasn't anything catastrophic.
At this point I thought I jumped timing. Pulled the upper cover off, everything lines up (sweet!).
Pulled the plugs. #1 looks like it had knocked to death which I don't understand because I have link set to show me when there is 2* of knock retard and I rarely beat on the car (however, yesterday I was doing some "spirited driving" and I logged 11.8:1 afr up top (YIKES!) but only 1.8* of knock retard). I also saw what looked to be some metal debris on the top of the piston (UGH). #2 and #3 looked OKAY. A little black and grey. #4 is the one that scares the shit out of me. Pulled it, it's covered in oil. Not the treads, but the electrode... It doesn't look too bad in the pic but I had wiped it off
So, my guess right now is that #4 piston ring land is cracked from the lean pull I was doing. But I honestly have no idea. My buddy is coming over tonight so we can do a comp test. It's not smoking though which is confusing.
Does anyone have any ideas to share? Thanks. I'm real upset that this JDM EVO 1 engine failed...
This is my daily driver too so it's extra crummy.
I've attached a log that I trimmed down. The bucking and missing is at the beginning when the RPM looks way out of whack. I've also attached some pics of the plugs.
***UPDATE***
Compression test was good. Done on a cold engine (hence the lower reading), all plugs out, really just looking for major differences in cylinders (50+ PSI)
150-135-155-120
I am wondering if I just fouled the plugs... I've been running BPR8ES to help keep knock levels down. Perhaps the fast crank was caused by the engine being warm and stalling right before I cranked it? Oil pressure already high, everything at temperature=less resistance when cranking? Also, the seals on the plug wells must have been a factor, causing the engine to misfire, and leading to number four plug being wet.
*******UPDATE NUMBER 2******
Everything is A-OKAY.
The fast crank must have been caused by the warm engine because it sounds 100% normal now.
I cleaned the plugs and she runs like a champ. I still need to do the valve stem seals because I feel like those could be on their way out. Plus the spark plug seals are shot.
SO happy that it wasn't anything catastrophic.
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