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> Still chasing a surge or a miss on L-jet 2056
jmargush
post Jul 30 2014, 07:51 PM
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Still working getting the 2056 L-jet to run well.

I have a surge or miss under hard acceleration 3500rpm and above.

It doesn't happen every time and I think it is more likely to happen under rapid wide open throttle, but I can get good acceleration pulls sometimes.

If it does start to surge and I stay in it I stay on the throttle I can hear a pfft or burp of air which I think is coming out of the exhaust.

Fuel pressure (with Harbor Freight gauge) is reading 39psi under hard acceleration
Timing is set to 28 dgrees BTDC@3500 rpm
New plug wires and plugs
Cleaned distributor and regreased (running Pertronix)
Tried 2 different Bosch coils with same results

Could the fuel pump volume be out of spec and still deliver pressures like I am seeing?(what are the specs for fuel pump volume test?)

Should I try a different timing setting, more or less advance?

Could the potentiometer in the AFM be hitting a dead spot?

Or could a bad plug wire give intermittent issues like this?

Starting to get old car-ed out!
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