Running rough - Delivery Valve Loose

Now I'm stumped. I changed the pump out, but quickly found out the pump I bought was bad off! It had a rough idle along with a host of other issues.

Long story short:

Pump has been gone thru and calibrated
Injectors tested and balanced
New lift pump ( has leak & needs to be taken back and exchanged )
Compression Test: all cylinders around 450psi

Truck still has miss. Gets worse when truck warms up.

I'M STUMPED!!!!!!
 
Also, I ordered an adjustable OFV. Fuel pressure is around 17 psi @ idle. I want to see what more fuel pressure will do. I've played with fuel pressure some- but doesn't seem to smoothe out all the way. I will play with it more when the OFV comes in.

If I check temp on exhaust manifold, cylinder 1 is about 25-30 degrees cooler than cylinder 6. Not sure if that helps?
 
does it it leak fuel anywhere mine missed on one and the dv o ring was leaking btw whos truck is the 2nd gen crew cab? thats nice didnt a place in tx build them?
 
Last edited:
The pump just got back from shop, so no leaks there. The crew cab is the problem truck. Bayer Conversions in Minnesota did it.
 
You must log in or register to reply here.
Top