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Engine dies under load

Old 04-23-18, 08:45 AM
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Engine dies under load

I have a s4 6 port with mikuni carb and 85 distributor and coils. the engine is in its simplest form because it's an engine swap engine in a dunebuggy.

the engine idles great and revs at idle without a problem, the problem occurs when I put the engine under load. When I release the clutch the car revs down and tries to die. if I try to accommodate for it dying by giving more fuel as letting out the clutch it still stutters.

I just built this engine and im in the testing stages so any suggestions are helpful, I just timed it to Leading tdc using a timing light on spark plug L1.
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Old 04-23-18, 08:53 AM
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Originally Posted by cocopuffsman View Post
I have a s4 6 port with mikuni carb and 85 distributor and coils. the engine is in its simplest form because it's an engine swap engine in a dunebuggy.

the engine idles great and revs at idle without a problem, the problem occurs when I put the engine under load. When I release the clutch the car revs down and tries to die. if I try to accommodate for it dying by giving more fuel as letting out the clutch it still stutters.

I just built this engine and im in the testing stages so any suggestions are helpful, I just timed it to Leading tdc using a timing light on spark plug L1.
could be my fuel pump, im using the electric fuel pump that was used on the old vw engine, 35 GPH and 4-7 PSI...
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Old 04-23-18, 10:21 AM
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Originally Posted by cocopuffsman View Post

could be my fuel pump, im using the electric fuel pump that was used on the old vw engine, 35 GPH and 4-7 PSI...
anybody have an idea on what the fuel psi should be with a carburetor setup?
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