Technical Tips > Engines - Carbies - Exhausts - Dissys

hi all new here. 80 mod with carbie prob

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77CVT:
Didn't think 80's had a computer so I wouldn't think it can go into limp mode.  Carb numbers should be on the front of the carb, usually on the top.

Rochesters look complicated but are pretty easy - I have a tech sheet on how to set them up right (Thanks Lars) if you want me to email it.

Does it only do it when you nail it or under normal light acceleration?

markekemp:
It runs fine ill drive from here to toukley (8 ks) then the check engine light comes on got no guts ( like limp mode) turn ingision off and back on while drving ,light gos out , runs fine , if i cant fix it over the next week or so ill take it to someone , but id rather get more input from others and try myself. i was told that mine is the first of the computers b4 the feul injection, (i dont know enogh about vettes yet this is my first ive been doin cars up for years , (i owned the madmax interceptor on the coast And i own the 66 batmobile tribute (from a val) what was in streetmachine at christmas).
My vin number on the vette is1Z87HAS408886. Ithought it was a 350 , but now looking up info its a 305 (correct me if Iam wrong) from california, Anti poultion laws, .
the numbers on my carbie Rochester quad .17080504 3129CKH .it has apart from electric choke two plugs with three wires goin into the top of the carbie,
lookin 4ward to sorting her out love drivin it, iam now a big vet fan.

markekemp:
numbers on top of carbie on the butterflies 58411 ,584C9

77CVT:
Here's some rochester carb sites that might be handy.

Tech Info

Code definition

Also, a check of your plugs will tell if it is lean or rich.

Scott:
When is starts running rough, pop the bonnet and rgab the fuel line where is goes into the carby.  Maybe it's getting too hot.

Could be a badly adjusted carb, and when the auto choke cuts out, it runs rough.

Or could be an electrical problem.  Something like the coil getting hot and playing up.  Any computer would be for the ignition if it still had a carb so that might be why the light comes on.

Everything is a guess though.  Good luck with it.

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