2 dead cylinders - Please help

[Michael H.]

Re: 2 dead cylinders - Please help

Good point Roy, but I think the fact that Kelly said the car ran well at the beginning of the cruise has to mean everything was correct, at least at that point. That would automatically eliminate a lot of possibitities. I suppose it's possible that during the first plug change after the cruise, the wires could have been switched and then even with the new plugs in #2 and #8, it would run about the same with two dead holes.

[Larry S.]

Re: 2 dead cylinders - Please help

Alot of excellent advice is on this post.

I will put in my 2 cents.With the poor quaility of today wires.I always recomend testing a wire with a inductive timing light as long as the car is running.Or with an ohm meter with the wire off the car.The reason I suggest this that unless your using a plug wire puller(I have been using one forever)your stressing the wire conection that connects to the plug each time you remove it and re install it.Some of the reproduction wire actually state the MAY be no good Once removed.

3 easy terms to help diagnoise a problem with a car or other

Good
No good
Questionable

Good and no good are no brainers,everybody knows what to do with them.Its the questionable item that we allways assume some how its not the problem and we ignore it hoping its not the problem,and waste hours working around it.

there was a list of what to look for above,take the good, no good, or questionable approach to those items replacing what is NO good.and repairing what is questionable and youll be able to fix it.

Good Luck

[Tracy C.]

Latest issue of the Corvette Restorer (V30 #4)

has an article written by Richard Denison entitled "Another Road Trip, sort of" (p45) where he decribes a similar problem with his '60. Except he had 4 dead cylinders.

Problem turned out to be the points condenser...

What year is your car, and do you have any mods or is it all stock?

tc

[Tom H.]

Re: 2 dead cylinders - Please help

Is your corvette a 72 or older? I had an identical problem with mine. If it is a vette without hardened valve seats, this could be your problem. Mine showed good on a compression test too. 72 and earlier did not have hardened seats, and my exhaust seats were slowly being hamered out. A leak down test probably would have caught it, but I didn't have the equipment to do it. Look down your valve stems and check that the exhaust stems aren't starting to stand up higher than the intakes. My exhaust valves were sunk in up to an eighth of an inch into the heads on my no. two and seven cylinders, and begining to go on three others.
I tried a new carb, dist. and three sets of plugs and wires before I found the problem.