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Dec 17, 2017 | 09:05 AM

65f250gatorspecial

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Help... !!!

Ive got an fe 390. It was running great but it needed to be cleaned up. I took the intake, valve covers off and got them powder coated. Reinstalled... Got everything set, truck ran great again but had an oil leak from the valve cover. Took the valve covers off again resealed, than had an oil leak from the intake. Ahhhhhhh!!! So took the intake out again, got it back together started it up and heard valves tapping, truck ran for less than 1 min total... Figured out i had 0 oil pressure.. Than figured out the shaft to the oil pump lifted ... Fixed that. Got oil pressure back, but i can not get the motor to fire correctly.. It backfires through the intake/carb. I think its either or vaccum leak or timming to advanced, but i have checked timming 3 times and can adjust more than 1 tooth advanced or retarded... Does anyone have any insight???? Could i have a bent valve or pushrod...

Dec 18, 2017 | 10:20 AM

KO1960

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Joined: Jul 2010

Posts: 1,129

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From: Chico, Ca.

Sounds like timing. Do you have the dizzy installed at TDC with the rotor pointing towards the #1 cylinder? If it’s set correctly, check the dizzy for a worn shaft. Manually rotate the engine while watching the rotor to check for slop in the timing chain. Good luck. Welcome to FTE.

Dec 18, 2017 | 10:24 AM

krewat

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Joined: Jul 2002

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From: Long Island USA

Yup sounds like you got the distributor miss-timed. Subscribed.

Dec 18, 2017 | 12:23 PM

65f250gatorspecial

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Thank you for the help

Quote:

Originally Posted by 65f250gatorspecial

I pulled the intake and covers off.... I will check the slop today in the chain... Im as sure as you can be that i had the timming correct... The truck was running, had to turn the idle screw way up... But it didnt hesitate or anything... But when the rpms dropped it would backfire through the intake... And had to keep the pedal to,the floor to get it started as well... I assume if i can turn the motor over at all with no instant movement of the rotor it means there is to much play in the chain? Or is some delay normal?