Re: Beat me to it Mike!
Installed new rotor - No change.
Installed new rotor - No change.
-
-
Re: 2 dead cylinders - Please help
Kelly,
Trying to think this thing through, but if the problem is fuel flow then the carb has a blockage that is creating a lean condition in cylinders #2 & 8. If it were rich, then I would think #'s 3 & 5 would be giving you problems.
Have you tried adjusting the air bleeds on the carb? If only one of the screws seems to have any affect on the engine, then that is the blocked side. But I am not sure it is a blocked idle passage as much as I wonder if something is in the off-idle/running circuit of the carb. Recently had a problem identical to this with a '58 Cad and found trash in the venturi feed on one barrel (Roch. 4GC carb). Unless you are familiar with carbs, I do not suggest you play with the Edelbrock (AFB). I hate to tell you to buy another carb, these things cost too much, but maybe that is the only option.
MikeComment
-
Re: 2 dead cylinders - Please help
OK, Thanks for verifying that for me. So now educate me on what to do with this carb.
by the way, I do have good spark on #2 (didn't try . I put a plug in the wire, held it to the block and saw good consistent spark.
Keep it coming, this forum is great!Comment
-
Re: 2 dead cylinders - Please help
Also, I tried the starting fluid trick. Sprayed around the intake seal on that bank and did't get a rev.Comment
-
Re: 2 dead cylinders - Please help
All good suggestions. Three things are required for a cylinder to fire, you need to check them. 1) compression -- 2) fuel -- 3) spark -- They are all rather easy to check.Comment
-
Re: 2 dead cylinders - Please help
I verified compression in all cylinders. All within 5 of 165psi.
I verified spark.
I see fuel delivery in the carb. Apparently the carb internals could be causing this?
TIA.Comment
-
Re: 2 dead cylinders - Please help
Kelly,
If the cylinders fire at least "sometimes", that tells us that most likely everything mechanical inside the engine if functioning properly. That would leave three probible causes. McCormic determined that it is a divided intake manifold so the problen could be a lean condition caused by the carburetor but if if the spark plugs are coming out wet, as you noticed, I would have to guess we're back to an ignition problem but if the "wet" on the plugs is oil and not fuel, there's possibly a deeper engine problem. Valve seals or guides could be the cause and fowling the plugs. I would try two new plugs and see if the engine runs on all eight, at least for a short time.Comment
-
Re: Beat me to it Mike!
Was the car running ok prior to this happening? Did it backfire, stumble, diesel (running after you turn off the ignition switch)?
If your still using the same plugs, change them out with either plugs that are firing or new ones. If the problem moves, then they are fouled up in the porcellins.
Does your power plant have points or electronic ignition?
Could be the the lobes on the distributor shaft or touchy point setup. I'm reaching now!
I'll let the heavy hitters take over form here.
I'll be watching for the permenant fix.
Good luck Kelly,
Chuck 32205Comment
-
Re: Beat me to it Mike!
Hey Chuck,
It happened on about an hour drive home. Nothing, I mean nothing was noticed. Just started feeling this surge. No run-on after shut-off.
Just installed new plugs. It's HEI.
Mike emailed me directly to shorten this thread - I'm digging into the carb next I guess.
I'll post the progress. Thanks for the info!Comment
-
Re: 2 dead cylinders - Please help
You might try cleaning the plug of the suspect cylinder(s) (one at a time), take the plug wire off of the suspect cylinder, then run the engine for a bit (it does run right?). Then pull the plug for that cylinder and see if is wet from fuel. If not, possibly no fuel getting to it. Good luck, and let us know. Interesting problem.
You did try changing the suspect plugs, right?Comment
-
Sounds like bad plugs
I noticed a lot of talk about plugs, wires, sparks, carbs, and such, but nothing that the #2 and #8 plugs were firing. Mark the two that won't fire with a magic marker so you know which are dead. Mark the top side of the plug as it sits in the hole before you remove them.
Pull out the two dead ones. Take two of the old ones from the trash can, gap them to .045 (you said HEI), and put them in #2 and #8 cylinders. If a plug cracks, it wouldn't fire under pressure. And most failures occur new rather than old. It may even fire with the old outside the block test, but it isn't pressurized.
Take the marked ones and hold them with the mark side up to see if the ground electrode is hitting the piston.
If this doesn't make a difference, then take the two marked plugs and put them in cylinders that fire, like 3 & 4 since they are easy to reach. See if 3 and 4 lose power.
Make sure they are AC. I have never had luck with Champion althoguh many swear by them.Comment
-
Re: 2 dead cylinders - Please help
Kelly,
Welcome to the NCRS site. I have been on here for awhile and they have helped tremendously with my 69. (Thanks everyone!!)
I suggested to Kelly to join as he has a corvette and this formum has very, very knowledgable people. You will always get your answer here.Comment
-
Re: Sounds like bad plugs
I've tried 3 new sets of plugs in 2 & 8. No change.
I finally stopped by a shop nearby and the guy said maybe an internal intake leak. I don't suspect this is the problem but nothing is making sense.
I will do the ck with marking the tip of the plug - never thought of that!
Thanks all.Comment
-
Re: 2 dead cylinders - Please help
Kelly,
Thanks for informing of this great site! Many, many suggestions here and very quickly too.
I think I've found a new favorite spot!Comment
-
Re: 2 dead cylinders - Please help
Number #2 and #*8 are right next to each other when replacing the wires ( did you by chance have them mixed )? I mean the firing order! If you get spark while the engine is running by pulling each wire off the cap ( not the plug) you have ether a bad wire or crack in the cap between 2 and 8. My two cents.Comment
Comment