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Old 05-19-2009, 02:55 PM
wiser626's Avatar
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acceleration problem on a 79 chevy malibu

ok so the problem persisted and i had enough trying to pin point what the problem was so i went to one of the plenty of good shops here in Pasadena and found one that recommended me to another. I finally found out that the acceleration problem had to do with the carb. if i am correct, the meter rod spring wasnt functioning the right way. when in idle its supposed to stay down and when in drive and accelerating it is supposed to open up so that more fuel can run thru. the carb lid had to be taken off in order to get to it. if u dont know what im talkin about my previous threads should explain what the problem was and the possible solutions. $120 bucks youch! the guy was trust worthy. had a guy drop off his pristine 69 mustang gt 460 there saying that he was the best there is at we he does. strongly recommended if in the PASADENA, IRWINDALE, and BALDWIN PARK area. Engine Dynamics is the shops name.



Last edited by wiser626; 05-19-2009 at 03:37 PM.
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Old 05-19-2009, 03:26 PM
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Quote:
Originally Posted by wiser626
if i am correct, the meter rod spring wasnt functioning the right way. when in idle its supposed to stay down and when in drive and accelerating it is supposed to open up so that more fuel can run thru.
The power piston and spring assembly is modulated by manifold vacuum; low vacuum lets the spring lift the needles, enrichening the air/fuel mixture and vise versa. The spring can become weakened from heat and will degrade over time.

But what's more likely to happen, is the piston itself will become stuck or balky- and this can lead to an overly lean or overly rich condition condition, or just right (just as a stopped clock is correct twice a day )- depending on where it sticks and where your foot is in regard to the accelerator pedal.

I suppose $120.00 is a fair price, all things considered.

It's not the $2.00 spring, it's knowing that it needed the $2.00 spring, kind of deal... AKA "You're not paying me for what I do, you're paying me for what I know!"
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Old 05-19-2009, 03:35 PM
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Quote:
Originally Posted by cobalt327

I suppose $120.00 is a fair price, all things considered.

It's not the $2.00 spring, it's knowing that it needed the $2.00 spring, kind of deal... AKA "You're not paying me for what I do, you're paying me for what I know!"

yea exactly the way i took it. i was never gonna figure that out and that's the exact spring that was stuck. $45 for the diagnosis and the difference is the job.
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