Just did head gasket and studs. After assembly i turned up the tune a little. Jumped on it a bit, got a bop, bop, bop kinda miss. Or maybe its a pop, pop, kinda miss. Idles fine, runs fine under light pedal too. Only misses when I hit it.

Only thing I can think of is valve lash was a little loose (I notice while re-assembling) Figured I adjust valves later after running a while.


Any Ideas?

A look below will show the mods.

 

my friends 01 did this and he had all new valves and valve springs done and has never had a problem since, his truck also had 210k on it, so I don't know

 

Def could be some float going on. Why would you wait to adjust them?! Good way to screw a motor up...

 

you were in there anyway man ya should've at least checked them. preventative maintenance. This'll teach ya. it's much better than killin a motor but next time take your time and check everything

 

How is the LPG working for you?

 

The LPG is lame. about 40 hp around town. I never use it while racing, nitrous IS the way to go. 300 hp instead. LPG was a waste of money. But I keep it. Now putting methonol injection on. After I fix valve miss, if thats what it is.


That job was a pain in the ***. had to pull off both turbos, 2nd CP3, Exhaust manifold bolts are killers to get to.

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I assume the gasket I pull off was factory. The new gasket I put on was OEM cummins. Maybe new gasket was a few thousandths fatter, giving me more lash.

It was a 5 layer gasket that cummins uses. I dont know. I'll try adj valves first. I had an idea they were a little loose when I re-assembled. BUT LIke I said, its an easy adj, compared to R&R head gasket.

What can I say, $ was an issue, I joined the other 10% of america, unemployed due to the oil spill in the GULF. Drill-Ban.

 

It was an injector issue. 2 bad ones. Probaly 1 then, then continued use fried another.
Don't use RAIL plug! Keep the modified relief valve installed.

 

Rail plugs are for diagnoses only

 

Typical with a Smarty on the 555's. Start playing with the tunes and timing to find one that will work well.