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I had a terse conversation with the shop manager this morning. I didn't feel I was getting all the information about what they had done.
This is what I can confirm what had been done:
Replaced coil packs and spark plugs Compression test cylinder 1,3 and 4 and 235-240 psi, cylinder 2 at 180 Leakdown test shows less that 5% on all valves Tech ran a borescope down cylinder but could not definitively see any damage to the cylinder wall. Tool was not good enough.
They have started the car and it runs a little rough at idle, but runs fine otherwise. The issue is back to where it was in April, when this all started. They expect another cylinder misfire in its current state.
I spoke to a buddy who works in a garage down the road from where my car is at. He thinks the pieces of the spark plug blew out the exhaust valve and is in the Cat. To me, that makes sense.
I'm tempted to pull the car out and drive it to my buddy to run his better borescope, to see what the cylinder wall and the piston head looks like.
Hopefully, this can be fixed without going to a new engine. Better boroscope view on Cylinder #2, will definitely help the long-term prognosis.
I spent $560 for a new coil packs and spark plugs at the first garage.
Here is the real results from the second garage…
Using a high definition camera on a borescope, that my friend, the mechanic, bought on Amazon for $70, found that the number two cylinder head was gouged, and the cylinder wall was lightly scored. He found no residue of the missing pieces of the spark plug.
He does believe that it went out the exhaust and is sitting in the catalytic converter.
He drove it around… beat up on the car up to redline multiple times. He said it runs and drives perfectly fine. No idling issues. No issues at any RPM.
His recommendation is to get a new cylinder head and a new piston. He said you can get another misfire anywhere within 110,000 miles. He says, drive it until you can’t.
So, I’m gonna bang on it for about 3 to 400 miles locally. If it doesn’t give me any issues, I’m driving it to S2kDays in mid July..
here’s where you can all laugh… I’ve been diagnosing cylinder four, the entire time! I was using the firing diagram to figure out which cylinder was which!!
Last edited by JoePhotographer; Jun 22, 2023 at 01:26 PM.
