Misfiring

[Linedog]

I was going down the highway about 75 started to feel like it was misfiring, Hiccup, sometimes 1-2-3 times in a row

when it did there was a little extra rattle and also felt like a tire was out of balance



152k on truck replaced lift pump a week ago all stock no power adder



Your Thoughts

Joe

 

[Linedog]

Took it to Source Automotive didn't act up at all for 80 miles
so they checked all this and drove it with computer hooked up
Checked vp psi good
checked lift pump flow good
checked all voltage good
Went for a trip friday it was allot worse the whole engine was
misfiring and surging forward wile going 7o mp.
So we put a new used, fuel control actuator (FCA) no change
Then we put pressure relief valve Fixed Everything
Joe

 

[Linedog]

oops I ment cp3

 

[Linedog]

all symptoms are back with codes 0193, 0148
now what
Joe

 

[Linedog]

found the problem, it's the rail pressure gauge I unplugged it
and the truck runs great
Joe

 

[Mobius1]

So the gauge itself was causing the problem? It wasn't a bad connector or harness but the actual gauge? interesting...

 

[Linedog]

I don't know it was not an all of the sudden thing
and we couldn't pinpoint any certain situation so
I think it is in the gauge it self I will see if I can
get it repaired when I have have more time
Joe