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Old 10-12-2020, 11:19 PM
wbnapier wbnapier is offline
Chief Ponti-yacker
 
Join Date: Sep 2017
Location: Encinitas, CA
Posts: 592
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Quote:
Originally Posted by tekuhn View Post
You drove the car a fair distance before the seize, and surely you would have known if the engine was running on 5 cylinders. I tend to agree the spark plugs are a real mystery, but can't believe you wouldn't have detected that severe of a misfire if the gaps were closed from the first fire-up. Especially with a manual transmission and clutch where everything is transmitted to the driveline.
I did detect the misfire. I thought it was A/F or timing. I didn't think it was a no fire in the plugs. My plan was to cruise for a few minutes then return home and figure out the misfire.

And, I used the temp gun on each exhaust port and all were + or - 10 degrees. So, I assumed all cylinders were firing.

Remember, this is my first rodeo... Not an expert.

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1965 Pontiac GTO
455/469 w/ #48 Heads, '65 Tri-Power
9.25:1 CR
Stump Puller Cam
Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00
3.55 Rear Differential
Front: 225/60R15 Height: 25.6"
Rear: 275/60R15 Height: 28"