engine stutters at high rpm
04-30-18, 11:10 PM
#1
Junior Member
Thread Starter
engine stutters at high rpm
giving slow consistent throttle will allow me to gain rpms but quick acceleration causes the engine to stutter and lose power.
im running 13b na with mikuni sidedraft carburetor, 85 stock distributor and coils with vacuum advance hooked up to carburetor. electric fuel pump and properly sized carburetor jets. no ecu or computers etc. Ive narrowed it down to be one of most likely things: fuel pressure, bad vacuum advance (one moves under less pressure then the other?), bad coils dying etc, carb running rich.
have any ideas or things I may not be thinking of?
im running 13b na with mikuni sidedraft carburetor, 85 stock distributor and coils with vacuum advance hooked up to carburetor. electric fuel pump and properly sized carburetor jets. no ecu or computers etc. Ive narrowed it down to be one of most likely things: fuel pressure, bad vacuum advance (one moves under less pressure then the other?), bad coils dying etc, carb running rich.
have any ideas or things I may not be thinking of?
Last edited by cocopuffsman; 05-01-18 at 06:18 AM.
05-01-18, 07:01 AM
#2
Waffles - hmmm good
iTrader: (1)
Your carb is probably not adjusted right. Your transition circuit is not working to get you from idle to throttle open smoothly. I doubt its the coils, vac advance. The fuel pressure could be an issue if its over 4-5 psi. Most mikuni and webbers like around 3 psi.
Go here and read the Webber and Dellorto tuning book Foxed.ca
Go here and read the Webber and Dellorto tuning book Foxed.ca
05-01-18, 08:31 AM
#3
Junior Member
Thread Starter
Your carb is probably not adjusted right. Your transition circuit is not working to get you from idle to throttle open smoothly. I doubt its the coils, vac advance. The fuel pressure could be an issue if its over 4-5 psi. Most mikuni and webbers like around 3 psi.
Go here and read the Webber and Dellorto tuning book Foxed.ca
Go here and read the Webber and Dellorto tuning book Foxed.ca
05-10-18, 12:03 AM
#4
Junior Member
Thread Starter
Your carb is probably not adjusted right. Your transition circuit is not working to get you from idle to throttle open smoothly. I doubt its the coils, vac advance. The fuel pressure could be an issue if its over 4-5 psi. Most mikuni and webbers like around 3 psi.
Go here and read the Webber and Dellorto tuning book Foxed.ca
Go here and read the Webber and Dellorto tuning book Foxed.ca
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