I can hear my 357 SB missing

[POWER2BURN]

When reved up to anything above 2000rpm. (and held while parked)

I can hear it missing.

I have 3 guesses.

bad 16 yr old coil?, bad 16 yr old module?, needs high octain then 87?

What do you people think?

[pro70z28]

All the above...and add Check Plug Wires & Plugs

[viking]

Make sure and check the muffler bearing....

[POWER2BURN]

the plugs are new.

the wires should be good. a lil over a year old MSD 8mm wires.

[pro70z28]

Originally posted by POWER2BURN
When reved up to anything above 2000rpm. (and held while parked)

I can hear it missing.

I have 3 guesses.

bad 16 yr old coil?, bad 16 yr old module?, needs high octain then 87?

What do you people think?

Is it intermittent or does it seem like one cylinder misfiring?

[Bob Parmenter]

Originally posted by POWER2BURN
the plugs are new.

Yeah, but are they gapped right?

[pro70z28]

Originally posted by viking
Make sure and check the muffler bearing....

Wooow, I am really surprised to see a Timkin in there. I use the smaller ball bearings in mine. Actually I found a cheaper source for the ball bearings. I use shot from a 12 ga. . I don't know if yer' spoz' ta' use them cuz' of the new no lead laws, but hey, it works for me. While I got yer attention, I gotta ask ...... How do you keep seals on that bearing? My guess would be some sort of ceramic unit or a dry lube injector... How am I doin'????

[pro70z28]

Originally posted by Streets
NEW don't mean GOOD and moisture gets into ANY plug wire...IT could also be the Johnson rod adjustments yanno

Depends too if the johnson rods are carbon core or copper core.

[inlineidiot]

..Geeze....How about a .....lets see here.. .......A complete tune up.???.......Tweek the giggling pins too.......Hey Viking.!!.....whats the part # for that muffler bearing anyhow.???... .....

[Dave Severson]

An ohm meter should tell the story on your plug wires. How about the cap, rotor, advance mechanism, and general wear on the distriblutor??? Did a leak down check show all the cylinders to be good, or are you trying to fix a valve problem with ignition peieces???

[Stu Cool]

How about pulling one plug wire at a time to locate the bad cylinder, then go from there.

Pat

[viking]

Originally posted by inlineidiot
..Geeze....How about a .....lets see here.. .......A complete tune up.???.......Tweek the giggling pins too.......Hey Viking.!!.....whats the part # for that muffler bearing anyhow.???... .....

not sure of that #, that pic was a file photo, a ricer exhaust, I believe the failure was caused buy burnin un-leaded rice.

[L00se Deuce]

oh got to keep those V8s hittin on all 8!

ive had some valve springs go bad, idles ok but once on the gas shes a V7 - find the dead hole (via pullin wires or a compression check) then you can pull your tappet cover off & watch your springs go UP & DOWN & you may even get shot with some dirty motor oil!?!?! if your lucky! LOL!!!!!!!!

[POWER2BURN]

All cylinders are are within 18 psi.

149-167psi. 7 cylinders are 158-167.

cylinder 4 is 149 psi.

My motor runs perdy good.

I Just want a big improvement in power.

So I will just run this motor till I build a big block to swap in.

[Dan]

I made the same mistake once; built a 355 when I shoulda built a big block for my trailer towing rig and now I gotta live with it. Had a similar miss when we first had it running but it was just the lash adjustment on an exhaust valve was too tight. Might help. Good Luck!