I'm running the stock $32 Carter pump mounted on the filter housing, I know, I know it's not an ideal pump for the QC LWB truck but I just don't have the $400+ to do the upgrade at this time.
Anyway what should the pressure be on the back side of the filter going to the IP? During cold weather the truck will ramp up to 1000 RPM but it stumbles almost like a misfire if it were a gasser. This causes it to drop back down to 750 RPM. The only way I can get around this is to use the idle up feature with a cruse control. The truck will still stumble but it stays on high idle.
I was thinking maybe the pump was going out again but would like to find a gauge to check it like maybe this.
http://www.harborfreight.com/automotive-motorcycle/diagnostics/fuel-injection-pump-tester-92699.html.
I know the IP on the 03 and newer trucks will not be damaged by low fuel pressure unlike the older trucks, but I'm sure low pressure can't be good for it also. What things could I be damaging if the FP pressure is in fact low. Also if it's not low what else could cause this, it only does it when it's cold outside.
Don
I'm running the stock $32 Carter pump mounted on the filter housing, I know, I know it's not an ideal pump for the QC LWB truck but I just don't have the $400+ to do the upgrade at this time. Anyway what should the pressure be on the back side of the filter going to the IP? During cold weather the truck will ramp up to 1000 RPM but it stumbles almost like a misfire if it were a gasser. This causes it to drop back down to 750 RPM. The only way I can get around this is to use the idle up feature with a cruse control. The truck will still stumble but it stays on high idle. I was thinking maybe the pump was going out again but would like to find a gauge to check it like maybe this. http://www.harborfreight.com/automotive-motorcycle/diagnostics/fuel-injection-pump-tester-92699.html. I know the IP on the 03 and newer trucks will not be damaged by low fuel pressure unlike the older trucks, but I'm sure low pressure can't be good for it also. What things could I be damaging if the FP pressure is in fact low. Also if it's not low what else could cause this, it only does it when it's cold outside. Don