by cmauz61 » Wed Dec 30, 2015 11:14 pm
hey guys. 92 250 5 speed manual. one day i go outside and have no power... i instantly think, oo clogged filter or i need a new lift pump (used to make 34 lbs boost. pump is maxed. 4200 rpm and fuel pin)....
*pump was rebuild a year ago and leaks nothing..
*the truck starts great and throws a black cloud like it should at start
*anything off idle under light, moderate, or heavy excel the truck sputters and goes to pure white (losing all power instantly)...
*If the truck is not in gear and i try to rev it up hard its slightly black at the start and then pure white and backfires..
*wont make more than 5 pounds now and that is if I am in 5th gear at 30.... cant go faster than 35... loose all power and it decels if i try to drive light medium or hard.....
*I checked the valves and they are all close to tolerances and seem ok.
*I have chaged 2 filters, 2 lift pumps, and even ran a beans diesel sump kit fromt the tank (half inch line) to the new lift pump....
all of these changes have done nothing.... every once in awhile it will power up to 20 psi and then cut hard and blow pure white for miles....
it should be getting the fuel...
I am completely stumped..... is my pump F#@(ed or is this something random. like a switch that i dunno about.
any help would be appreciated1!!!!! about to take it to a shop if i cant figure this out
1992 dodge w250 12v
4" turbo back exhaust, denny t fuel pin, 12mm pump cranked, 4,200 rpm spring, afe intake/filter, egt gauge, boost gauge.