Rough Running 454 Mag?????help
 

CFD5 is down at lake cumberland with his apache and is having a hard time with one of his motors. The symptom is it will start and run fine for a second then run rough like it is out of fuel.

He has done:
new fuel pump
switch carb from other motor
switch ignition from other motor
inspected for water in fuel

Any other ideas?

Thanks!

Re: Rough Running 454 Mag?????help
 

Has he checked the timing? When was the last time he changed plugs? If it is indeed running out of fuel it could be an obstruction in his tank pick-up. Good luck.

Craig

Re: Rough Running 454 Mag?????help
 

Craig,

Thanks! Him and Hadley are down there wrenching on it now. They changed the plugs and have run fuel out of the "out" side of the fuel pump to make sure of psi.

They/we are stumped!

Oh yeah...the houseboat generator pooped out also! :(

Re: Rough Running 454 Mag?????help
 

Maybe it jumped time. Take a compression check. How old is the motor?

Re: Rough Running 454 Mag?????help
 

How About The Coil??????


Joe
American Performance Marine
410 573 0057

Re: Rough Running 454 Mag?????help
 

Coil Heats Up And Shorts !!!!

Joe Apmboats.com

Re: Rough Running 454 Mag?????help
 

checked the dist. for condisation.

Re: Rough Running 454 Mag?????help
 

STILL SOUNDS LIKE MAYBE COIL BAD CAP WILL ALWAYS BE BAD NOT GET WORSE AS U RUN


JOE HP TECH
AMERICAN PERFORMANCE MARINE
FOUNTIAN,CIGARETTE,SONIC, ACTIVE THUNDER
[email protected]

Re: Rough Running 454 Mag?????help
 

Sounds like you've covered all the bases on the fuel issue. Did you clean the screen at the intake of the carbs? Those carbs sometimes get clogged right there. Also you could switch coils to test them and switch ignition modules. Do one at a time so you can narrow it down. My guess would be the ignition module.

Re: Rough Running 454 Mag?????help
 

Do a leak down test ,It will tell you what kind of shape the motor is in, then move on to step two. Scratch your head.