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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 1980cdeluxe on June 15, 2006, 09:10:00 pm

Title: Chatter
Post by: 1980cdeluxe on June 15, 2006, 09:10:00 pm

Well, I've never really ran the 250 hard since I bought it... I always thought it was a bit pimpsy so earlier I was gagging on it and noticed anything out of first gear I get a chatter at full throttle. If I don't give it full throttle it's fine. The only time I can really mash it is in 1 up to 2, but not into 3rd.. Muncie transmission, any clue on what to check? I'm thinking of changing the plugs and distributor cap/button + wires soon. I think it could be the gas too, or the timing.. I tried fooling with the timing a bit this afternoon but it didn't help much.  Any suggestions are welcome!

Title: > Chatter
Post by: Lt.Del on June 15, 2006, 09:19:00 pm

Chatter?  When i think of that, i think of clutch/pressureplate/throwout bearing

Does it seem like it is coming from motor or drive train/ tranmission?

How old is your clutch disc / pressure plate?  You don't want to put too many hot spots on fly wheel or you wont be able to turn it anymore.

SgtDel

Title: Re: > Chatter
Post by: 1980cdeluxe on June 15, 2006, 10:22:00 pm

Motor chatter, sorry didn't specify that.

Title: Re: > Chatter
Post by: Lt.Del on June 17, 2006, 01:55:00 am

I am assuming you are referring to valve knocking.  It's called detonation or pinging. If so,
One word, timing.

Retard your timing a tad.  turn distributor a tad clockwise--to retard the spark just a hair. Then see what happens.  

Try a higher octane and see if that stops the problem.

SgtDel
aka "Andy"

www.delbridge.net

1979 Big 10 383 stroker
1991 Blu 'Burb 3/4 ton 4x4

Edited by: SgtDel  at: 6/17/06 1:03 am