crab bucket
Crab Bucket
The old injection pump in my '93 F250 went from an occasional drip out the weep hole to crying out the top cover about a month ago. The pump would stumble after running for 40 minutes in the summer heat and the truck would act gutless.
I ordered a non-turbo '93-94 pump from Uhaul's site and they sent me a Diesel Logic rebuild. I had my diesel mechanic install it along with new return lines. At the static timing marks, the truck put out lots of black smoke at idle and had poor power. The mechanic had to adjust the timing back about a nickel's width to the driver's side to get rid of the smoke at idle. With the timing set like this, the truck has no throttle response and still has a slight haze on acceleration. The pump heats up much more than the one it replaced. No leaks and it starts just as easy as it aways did.
My first thought was bad pump. I checked for intake and exhaust obstructions and couldn't see any. Could changing the injection pump expose a bad injector? I can hear valve clatter but not any knocking. I'm kicking myself for having a shop do the work. That was money I could have spent on a rebuild for the ip and injectors.
My idea is to at least line the pump back to the static marks and try turning down the fuel in baby steps. If the performace improves, then I would like to time it dynamically before throwing more parts at it. Does anybody know a shop that can really time my truck in the Houston area that has the equipment to time my IDI?
I ordered a non-turbo '93-94 pump from Uhaul's site and they sent me a Diesel Logic rebuild. I had my diesel mechanic install it along with new return lines. At the static timing marks, the truck put out lots of black smoke at idle and had poor power. The mechanic had to adjust the timing back about a nickel's width to the driver's side to get rid of the smoke at idle. With the timing set like this, the truck has no throttle response and still has a slight haze on acceleration. The pump heats up much more than the one it replaced. No leaks and it starts just as easy as it aways did.
My first thought was bad pump. I checked for intake and exhaust obstructions and couldn't see any. Could changing the injection pump expose a bad injector? I can hear valve clatter but not any knocking. I'm kicking myself for having a shop do the work. That was money I could have spent on a rebuild for the ip and injectors.
My idea is to at least line the pump back to the static marks and try turning down the fuel in baby steps. If the performace improves, then I would like to time it dynamically before throwing more parts at it. Does anybody know a shop that can really time my truck in the Houston area that has the equipment to time my IDI?