I recently acquired a 2002 GTX DI that supposedly was "only having TPS issues". Upon diagnosis and continual work on the ski for the last 2 weeks I am in no better position than I was when I bought the ski. It fires right up no issue and idles fine around 1440rpm. At slow speeds the engine seems to perform well but it does not have any real out of the hole power that I would expect from this ski. It sputters (although less now after the work I have done) up to around low 4k rpm range and then refuses to go over 5k. The engine seems to be mis-firing/ sputtering consistently; and 100% of the time when in that rev range the "MAINT" signal comes on and the red light starts flashing. No beeping is occurring. If I slow down to below 2krpm the ski will idle fine and the maint light goes off.
Over the last 2 weeks I have replaced the fuel filter, cleaned out the supply line to the rail, cleaned both filter screens on the fuel pump, cleaned and checked the injectors, replaced the solenoid valve and check valve attached to solenoid, replaced the rectifier AND stator, new plugs, checked and charged battery, deep cleaned all electrical connections, compression tested the cylinders (both hold steady at 122psi), fresh non-ethanol fuel with a cleaning/ lubricating additive, inspected and cleaned all RAVE valves (the bellows in side of them look like originals but I am not 100% sure they are bad...they look a little weak), and a few other minor things that are not coming to mind. I have the shop repair manual to follow along with as well.
I am at a loss as to what else it could be and any of the shops in my area are 5-6 weeks out on even diagnosing whats wrong. I am pressure testing the fuel lines today just to be sure adequate fuel is being delivered. I was also thinking of ordering new bellows for the rave valves and see if this helps. I have not pressure tested the air compressor yet. Could that be an issues? As the title says HELP!...my next step is dynamite!
Over the last 2 weeks I have replaced the fuel filter, cleaned out the supply line to the rail, cleaned both filter screens on the fuel pump, cleaned and checked the injectors, replaced the solenoid valve and check valve attached to solenoid, replaced the rectifier AND stator, new plugs, checked and charged battery, deep cleaned all electrical connections, compression tested the cylinders (both hold steady at 122psi), fresh non-ethanol fuel with a cleaning/ lubricating additive, inspected and cleaned all RAVE valves (the bellows in side of them look like originals but I am not 100% sure they are bad...they look a little weak), and a few other minor things that are not coming to mind. I have the shop repair manual to follow along with as well.
I am at a loss as to what else it could be and any of the shops in my area are 5-6 weeks out on even diagnosing whats wrong. I am pressure testing the fuel lines today just to be sure adequate fuel is being delivered. I was also thinking of ordering new bellows for the rave valves and see if this helps. I have not pressure tested the air compressor yet. Could that be an issues? As the title says HELP!...my next step is dynamite!
