Writing my first forum post in hopes someone could share some info on a fix for this very annoying issue im having.
A little history - bought the sled in January, used to have a boondocker turbo, was removed, sled was sitting for a couple years. Owner started it and loaded on trailer, no problems.
I drained the fuel, oil, chaincase and cleaned exhaust valves. Replaced all fluids fresh
Started it, had engine light and bogged, stalled at various rpms, but not idle. Code was TPS abnormal rate of change.
Tested it and concluded needed new tps.
-Replaced TPS and set myself multiple times with multiple multimeters.
-replaced fuel filter,
-removed injectors(blue) tested with battery and cleaned.
-cleaned throttle bodies
-Checked reeds, cleaned and ordered new pedals due to minor chips.
-New plugs.
Sled pulled hard but wont idle. Idles very low ~800-1200 and then dies. Wont start unless giving blip of throttle.
Finally take to dealer.
Dealer
-Tests and resets tps
-Tests voltage system
-Tests injectors
-Tests ignition coils
-Tests tmap sensor
-Checked fuel pressure
-Air gap on flywheel
-Compression at 120 both sides
All checked out okay
-Replaced reed pedals
-New plugs
Dealer bore scope the cylinders and found scoring on pistons, recommended new top end.
-I just rebuilt the top end with new pistons, gaskets and cleaned up the cylinder.
-Cleaned exhaust valves again, hoses and tested solenoid.
-Took out and cleaned egr sensor
-Removed, cleaned and dialectic greased about every electrical plug
-Cleaned plug caps, cut back wires and re threaded coil end and plug ends
Im really at a loss here on what this could be. Im only seeing 110 on compression but ive only just competed rebuild and have barely done one heat cycle in garage. Rings not seated
The sled would idle for a while when cold before, but doesnt seem to want to at all anymore, for the 10 mins ive run it. Also last day i had it out, before the dealer, for a couple hours it wouldnt go above 5500rpm. Cleared up after and ran at 7300rpm at dealer.
Ive read every form post i can find on google relating to this issue before posting here.
Any help is appreciated……
A little history - bought the sled in January, used to have a boondocker turbo, was removed, sled was sitting for a couple years. Owner started it and loaded on trailer, no problems.
I drained the fuel, oil, chaincase and cleaned exhaust valves. Replaced all fluids fresh
Started it, had engine light and bogged, stalled at various rpms, but not idle. Code was TPS abnormal rate of change.
Tested it and concluded needed new tps.
-Replaced TPS and set myself multiple times with multiple multimeters.
-replaced fuel filter,
-removed injectors(blue) tested with battery and cleaned.
-cleaned throttle bodies
-Checked reeds, cleaned and ordered new pedals due to minor chips.
-New plugs.
Sled pulled hard but wont idle. Idles very low ~800-1200 and then dies. Wont start unless giving blip of throttle.
Finally take to dealer.
Dealer
-Tests and resets tps
-Tests voltage system
-Tests injectors
-Tests ignition coils
-Tests tmap sensor
-Checked fuel pressure
-Air gap on flywheel
-Compression at 120 both sides
All checked out okay
-Replaced reed pedals
-New plugs
Dealer bore scope the cylinders and found scoring on pistons, recommended new top end.
-I just rebuilt the top end with new pistons, gaskets and cleaned up the cylinder.
-Cleaned exhaust valves again, hoses and tested solenoid.
-Took out and cleaned egr sensor
-Removed, cleaned and dialectic greased about every electrical plug
-Cleaned plug caps, cut back wires and re threaded coil end and plug ends
Im really at a loss here on what this could be. Im only seeing 110 on compression but ive only just competed rebuild and have barely done one heat cycle in garage. Rings not seated
The sled would idle for a while when cold before, but doesnt seem to want to at all anymore, for the 10 mins ive run it. Also last day i had it out, before the dealer, for a couple hours it wouldnt go above 5500rpm. Cleared up after and ran at 7300rpm at dealer.
Ive read every form post i can find on google relating to this issue before posting here.
Any help is appreciated……
