Carb misses if I rev the throttle too fast?
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Fiat88
Carb misses if I rev the throttle too fast?
I noticed that my engine has a slight miss if the throttle is pressed too fast. Any ideas to fix it. Otherwise it idles great but if your at a stop light sometimes when you try to accelerate it misses for a split second but doesn't stall out. Car is a '79 automatic with 1800 manifold 32/36 dfev.
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TronDD
- Posts: 68
- Joined: Tue May 17, 2011 4:29 pm
- Your car is a: 1979 Fiat 2000
- Location: Massachusetts
Re: Carb misses if I rev the throttle too fast?
Search around for accelerator pump and carb rebuilds.
Usually that miss is a bad accelerator pump not squirting enough fuel in as the throttle blades open. Look down the carb and work the throttle quickly with your hand and see if you see gas squirt out or not.
Tim.
Usually that miss is a bad accelerator pump not squirting enough fuel in as the throttle blades open. Look down the carb and work the throttle quickly with your hand and see if you see gas squirt out or not.
Tim.
1979 Fiat 2000
1986 Trabant
1969 Chevelle
2003 Jetta TDI (Daily driver)
1986 Trabant
1969 Chevelle
2003 Jetta TDI (Daily driver)
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Fiat88
Re: Carb misses if I rev the throttle too fast?
The carb is only about 2 years old, hasn't seen a lot of driving time, could a accelerator pump go that fast?TronDD wrote:Search around for accelerator pump and carb rebuilds.
Usually that miss is a bad accelerator pump not squirting enough fuel in as the throttle blades open. Look down the carb and work the throttle quickly with your hand and see if you see gas squirt out or not.
Tim.
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So Cal Mark
Re: Carb misses if I rev the throttle too fast?
the diaphragm could fail in that time, but I've seen the 32/36 pump nozzle is a little undersized for a 2L. You may need to change the nozzle to one with a larger jet or ream yours out
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Fiat88
Re: Carb misses if I rev the throttle too fast?
Will check into that. Thanks Mark.So Cal Mark wrote:the diaphragm could fail in that time, but I've seen the 32/36 pump nozzle is a little undersized for a 2L. You may need to change the nozzle to one with a larger jet or ream yours out
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boogiedude
- Posts: 410
- Joined: Mon Mar 02, 2009 5:22 am
- Your car is a: 1978 spider 1800
- Location: Honolulu, HI
Re: Carb misses if I rev the throttle too fast?
Is it backfiring/spitting out the carb? I had problems for a while with mu carb spitting back or backfiring if I gave it too quick of a throttle movement off the line. Ended up being the timing/points gap. Wouldn't hurt to double check timing
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Fiat88
Re: Carb misses if I rev the throttle too fast?
Not sure but when I have my alignment done I'll ask my mechanic to check the timing, I've learned a lot about working on cars since buying this fiat but still haven't learned to use a timing gun.boogiedude wrote:Is it backfiring/spitting out the carb? I had problems for a while with mu carb spitting back or backfiring if I gave it too quick of a throttle movement off the line. Ended up being the timing/points gap. Wouldn't hurt to double check timing
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Danno
Re: Carb misses if I rev the throttle too fast?
I don't know what a carb miss is. Explain how you know this is a carb issue and not a timing or spark issue.
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Fiat88
Re: Carb misses if I rev the throttle too fast?
Not sure if its the carb, just telling what symptoms I noticed.Danno wrote:I don't know what a carb miss is. Explain how you know this is a carb issue and not a timing or spark issue.
