2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

91 miaa with 6port 13b with holley 4 barrel carb

Old Sep 20, 2014 | 07:28 PM
  #1  
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grease monkey
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From: atlanta, ga
GA 91 miaa with 6port 13b with holley 4 barrel carb

hi guys, i am thinking about getting this car as its pretty unique and i miss having a miata. the only problem with the car though is that after filling it up with gas, the car has a hard time starting and staying on??? after i guess cooling off, the car will stay on and start with no problems until it is time to fill up again... the fuel pressure on the holley 4 barrel carb is 6psi. is this a common problem with carbs? any tips?

thanks,

marlon from atl
Attached Thumbnails 91 miaa with 6port 13b with holley 4 barrel carb-13bmiata.jpg  
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Old Sep 20, 2014 | 07:59 PM
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From: Mile High
Vapor lock?
Are the carb and fuel lines insulated from the exhaust?
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Old Sep 25, 2014 | 09:54 AM
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From: London, Ontario, Canada
Fuel tank vent plugged?

I'm no carb expert (they belong in the garbage) but isn't 6 PSI a lot?
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Old Sep 25, 2014 | 10:45 AM
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From: Columbus, Ohio
If this was a stock carb, yes it would probably be a lot since those are usually 4-5. Holley carbs run around 6 though.

I would double check the vapour lock as well, carburetors and cars like these actually flow differently with the tank empty / full. Mine was blocked on my 70' Ford and it ran like crap empty, but nice when full.
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Old Sep 25, 2014 | 11:36 AM
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From: Mesquite, TX-DFW
Since nobody else has mention it, I'll go ahead.

If you buy that car, the water pump needs 2 belts, so either run a dual sheeve alt pully or a yoohoo belt. Second, that FRAM oil filter terrifies me.

Third, I agree, vapor lock.
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