Engine Trouble

[army_man15]

Ok guys maybe you can help me with this one,
I was driving down the road in my deuce when a loud bang went off and now the engine (multifuel) sounds like its backfiring ALOT, I checked the timing and it's spot on, there was no "popping" out of the intake to indicate a blown head gasket, and it only does this under load, it won't do it just by reving up the engine. Could the injector pump be bad or could a valve seat have come loose or is there another thing that may has happened I cannot think of? My daily driver broke down so I was driving this truck around and now this has happened, I just can't win . If you guys could help me figure this problem out, it would be greatly appreciated.

P.S. If needed I can post a video of the truck driving down underload, making the sound.

 

[wsucougarx]

You know a video may be needed. Guys in here can diagnose problems w/sounds.

 

[drgreg]

What fuel are you running?

 

[Divemaster920]

OK...Looks like Murphy is in Maine.....so all us Southern boys lets get out there....

 

[badgmc56]

Hard to tell without hearing it but I would take an educated guess that you lost a cylinder or partially lost it. Possible bent pushrod or broken rocker arm. A look under the valve cover would not hurt. May even be a broken valve spring.

 

[army_man15]

I had already checked the valves, pushrods, valve adjustment, and rockers all seem to be working fine except No. 5 rocker doesn't seem to be oiling, like all the others.

 

[nk14zp]

ARMY MAN where are you in maine.

 

[army_man15]

Beals, lol not too far from you.

 

[nk14zp]

Wife is from beals.

 

[army_man15]

Must have been an "alley, beal or carver" then lol

 

[nk14zp]

Peabody.

 

[nk14zp]

IS your name Smotch

 

[army_man15]

Close, its smorch not smotch buts thats ok it's mispronounced and spelled most of the time.