slipped timing normally = a really rought running truck with lots of white smoke.

 

Is there anything I can test or do to maybe isolate the issue?

 

TDC the engine and see if your pump tab slips in its hole. assuming you have stock timing

 

Guy before me said he advanced it 15 degrees. Ill check monday though since today is The Marine Corps Birthday and tomorrow is Veterans Day, I will be celebrating. Thank you for the help and I will get back to you guys with what i find out. Semper FI.

 

I ran a boost gauge to the block on the back of the AFC, I put it where the waste gate reference goes. I'm only making about 12 psi max. I think I'm going to remove the plate completely and see if that changes anything...

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Plate is gone, no change. Can a bad fuel heater give me these issues?

 

it will crack and spit and carry on most likely and be very hard starting if it is the fuel heater. if it is the lift pump it will have very low power like you are experiencing!

 

Ok so I deleted the fuel heater anyway since everyone says its junk and will eventually cause issues. The pre-filter was dirty and the gaskets looked pretty shot. Today I'm going to put a pressure gauge where the bleeder screw goes on top of the filter housing to see what kind of psi I'm getting to the pump. I was going to yesterday but my buddy with the tester got busy.

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+/- 50 psi @ idle, a bit more at WOT.

 

um??? stock lift pump?

 

Yes, stretched the OFV spring and inserted a bic pen spring, it had 3 shims on it too so I'm assuming that is while the pump pressure is higher than average. I'm heading back out there in an hour or so to pull the AFC back off so that I can look inside the IP, I think that I am having a rack issue. I'll try and get some picture of inside there so that you can see what I'm looking at.

 

I have removed the Bic pen spring, gutted the AFC, removed fuel plate. No smoke, no power, no change. Still maxing out at 12 psi and fuel pressure is back down within limits. Any ideas?