[72GTsport429]

it has a 429 in it im having problems with either timing or carb. when i have idleing it smooth but if i hit the throttle it starts missing iv tryed every thing iv rebiult the carb 7 times iv put a timng ligth on it its set where its supose to be but i set the points an they r set to wat the car book says if any one can help me please help cause im getting mad at it thanx

 

[darrin1999]

have you pulled the valve covers and checked the valve spring tension? that would be my guess- bad spring.

 

[72GTsport429]

if it jumped timing on the chain would it make it do it cause all the springs or good

 

[darrin1999]

if your timing is stable with the light then it shouldnt be a bad chain... if timing jumps around at all then look into the chain.

 

[darrin1999]

did you check the actual spring tension or just make sure they werent broken? a spring can lose tension without breaking if its ever been over-revved.. may look fine but until you test it you wont know... also the balast resistor could be bad... or the capacitor

 

[72GTsport429]

idk but its pissing me off would over heating it mess up the springs

 

[darrin1999]

overheating it could easily make the springs lose tension

 

[72GTsport429]

how bad is 230degess for about 15 mins

 

[72GTsport429]

an if it idleing smooth until u hit the throttle it acts like its missing it wont rev over 3100rpms

 

[darrin1999]

thats exactly how it would act if the springs lost tension

 

[72GTsport429]

ok cool im glad u helped me i was pissed off now im not to mad i know i got to get springs now lol but hey wat good is a muscle car if ur not under the hood right