fockabela2001

iTrader: (3)

ok guys heres the deal..this is a brand new motor.i mean everything..i finally got it runnin wich was hell in itself but now that's it runnin it is fowlin the 5,7,4,8 cylinders..just the back 4..the front 4 are lookin good..i've been tryin like heck to figure out what's goin on..i've replaced the wires,distrbutor cap and rotor, it has the e3 plugs in there and it's gettin spark to the plugs that are fowled..i've done it all..ran the vales,firing order, everything u can think of..the only thing i haven't done is a compression check because i dont' have a gauge yet..what do u guys think could be causin this bull crap??

bluebeast

iTrader: (1)

what cam and lifters did you use? is it running really bad or just feels it needs some bugs worked out?

fockabela2001

iTrader: (3)

yeah it's runnin really bad...poppin and everything..sounds like a freakin harley lol..but i have a comp cams custom ground..had it made for the motor.cant remember the exact numbers on it..a 500 lift and a 110 lobe..that's about all i remeber..

bluebeast

iTrader: (1)

flat tappet or roller cam? im asking cause the same thing happened to me and i had cam/ lifter failure...... hope you dont have the same problem! my engine is now back out and have to go through the engine and clean out all the metal powder paste that formed...... no big deal other than time and price of a new cam and lifters..... engine parts are fine, they just need to be cleaned out before its ran again

jmm98LS1

iTrader: (28)

Are you gas fouling the plugs or oil fouling them?.....I assume gas fouling. What do you have for a carb? Have you tuned it at all?

fockabela2001

iTrader: (3)

it's a roller..i've checked for metal shavings in the oil and everything and i haven't found any..and the rockers stay how there supposed to..is there any other way of knowin if it's the cam or lifters?? sorry to hear about your motor though..at least it didn't hurt anything else that's one good thing

fockabela2001

iTrader: (3)

i've got an edelbrock 750cfm on there..i thought it might have been the carb to..so i just had it rebuilt from a local guy here in oklahoma..same resuilt as before...i've tried everything to do with gas and fire issues.turned down the fuel pressure and everything..

jmm98LS1

iTrader: (28)

Have you tuned the carb at all or is it still set to factory adjustment? I've got the same carb on my 383, you'll need to do some tuning....a motor like that will not run right with an out of the box carb. Get yourself a calibration kit and read the manual, that'll get you going in the right direction.

Ryan02SS

iTrader: (3)

I had a similar problem with a 355 I had. It seemed to foul 4 plugs more than the others. No popping or sounding like a Harley, actually it ran fine. Turned out to be a wrong powervalve in the carb. I had a 8.5PV and it would idle 9-10" idle and the powervalve was opening at basically anything above idle.

Rogue86

iTrader: (14)

Sounds like you've got your plug wires all crossed up.

bluebeast

iTrader: (1)

power valve, wires crossed, carb problems, it could be any of these man....... just look at the wires first and make sure they are in order and then go down the list

JosephIV

iTrader: (14)

Try a set of cheap AC Delco plugs one heat range colder than what stock 350 calls for. It's worked for me on a 355 build. Couldn't believe my fancy platinums caused a problem. It may be the cheap fix.

fockabela2001

iTrader: (3)

hey guys thanks alot for all your help.i really appreciate it..but it did turn out to be the cam o well..time to get back to work..sucks cause i dont' have much time bein in the marines but it happens..again thanks alot guys!

SS4life

i had a similar problem..make sure your ignition system can give enough spark to the plugs. we had high spark plugs but the ignition system was weak..a set of cold plugs fixed our problem.