ENGINE PERFORMANCE PROBLEM1974 PLYMOUTH DUSTER ...

1974 Plymouth Duster

Tiny

dthurn01

June, 1, 2009 AT 4:09 PM

Engine Performance problem
1974 Plymouth Duster V8 Two Wheel Drive Automatic 72,600 miles

I have a 74 duster mopar 318 with a holley 4 barrel carb, headers, edelbrock manifold and the engine has a slight miss in it when I give it gas, I have put new spark plugs and new accel high temp plug wires on it, new distributor, rotor and cap and it stills has this lil miss, what could it be?

3 Answers

Tiny

wolf1961

June, 18, 2009 AT 12:35 PM

Hi. My Guess, it s in the Carb ! Bepending on what type of Carb You have- It s either the POWER VALVE or Bad Accelerator Pump. Check those out & Let Me know what You find out. Have a Good One, Dave

Tiny

dthurn01

June, 19, 2009 AT 10:00 AM

Thank you for your advise, yes the carb was out of tune, I readjusted it and it seems to be running fine now. The plug wires were fine, the carb was running too lean. Its a 600 cfm Holly carb, I also advanced the timing a lil

Tiny

wolf1961

June, 19, 2009 AT 1:50 PM

Hey, Glad to hear that ! Keep that good ole MOPAR Running.I finally got Mine Fired up Yesterday ! Have a Good One, Dave

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