exhaust popping

[gold84gmc]

well i tried that seafoam stuff, and it seemed to work a lil bit but didnt completely eliminate the popping.

[123 pugsy]

you're going about it all wrong. If you suspect it's a sticking valve which I doubt it is put a vacuum gauge on it and you'll know for sure.

Some very good advice here. Have you tried it?

[gold84gmc]

well except i dont have a vacum gauge haha............how would would i go about it anyways? (where to hook it up, wat rpm?)

[VileZambonie]

http://forum.73-87chevytrucks.com/smforum/index.php?topic=5963.0

If you want I'll email you that powerpoint on vacuum testing. Otherwise go to autozone and pick a gauge up and install it on any manifold vacuum source

[Blazin]

I agree make sure thats the problem first. The only time I have seen water use is if you have carbon knock. A piece of carbon on top of the piston banging into the head.
 Same old timer did this once way back when I first started out in the body business. We had a 88 Wrangler that had been flopped on its side. It got deposited into the shop via ramp truck, the fire dept. had cut the battery cables, so we pushed it around the shop until the new cables came in. That just happened to be after it was all fixed and painted. Put the new cables in, fired it up, and wrap wrap wrap, sounded like the motor was gone. Al ( the old timer ) came out listened to it, went back in the mechanic shop, came back out with a spray bottle full of water, reved it up a bit and sprayed a fine mist of water down the intake twice and wala the knock vanished. my boss the body shop manager was in his 40s and had never even seen that.

[gold84gmc]

vile- yea go ahead an email it ... gamebigboy3@aol.com

[gold84gmc]

so i replaced the plugs an wires and checked over the ignition system. i did find one wire that basically burned from the exhaust and had an opening in it.....but when i started it, it still had that popping noise...not quite as bad but its still there......and ideas? i am probably going to try that water trick today tho.

[VileZambonie]

What about the cap & rotor? Did you set the timing? how does the coil look? Did you put a vacuum gauge on it?

[Dave Kay]

http://forum.73-87chevytrucks.com/smforum/index.php?topic=5963.0

If you want I'll email you that powerpoint on vacuum testing. Otherwise go to autozone and pick a gauge up and install it on any manifold vacuum source

thanks!

[elegy_c10]

seafoam is a really good engine cleaner. i use it in all my cars throught the brake booster line and it works wonders.

[doodlebug]

Where would you attach the vacuum gauge to do this?

[VileZambonie]

Any manifold vacuum source