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I will try to leave fuel cap loose for a tank full good idea. I replaced the injectors about 2000 miles before the pump same problem before and after. New injectors are new boch not reman. I will check for presure at WOT tomorrow. What should it be? Is the return the short hose at top of pump...

You think I have the wrong fuel cap? Is there a vent in the tank? I guess a vacume is not normal. Just looking at all possibilities. I have invsted alot of time and money to still have the same problems.

IP is new not rebuilt bought it from heath deisel installed it last weekend set tdc off set to -1.74 truck ran good for a few days then misfire is slowly coming back. misfire happends with both pmds. tstat temp is 195. I found this check list on this forum one question ask do you hear a vacum...

Thanks for responding, I have replace Injection pump, Lift Pump, cold air intake, water pump, t stat, fan and clutch, eprom, Injectors, cross over pipe, electronic filter harness,and cdr valve all from heath deisel also I change fuel filter every oil change every 4000 to 5000 miles. always had...

Problem: Explain your problem in concise language (ie: Cranks but won’t fire). _____________poor fuel milage random misfire_______________ Demographics: tell us about your truck and your ambient conditions: - Year: ___1995___ - Truck model and class (ie: c2500) ____suburban k2500_____ -...