im runing a dirt late model and having problems with my engine it loses a lot of power after about 6 hard laps oil temp 250 water temp 200.. good fuel pressure good spark and good compresson any suggestions?????
throw away the made in china HEI coil that came in the off shore distributor..they look like this one...see the made in china logo...see the part number 1000015..toss it .. put in a delco or wells coil.. if you are running an HEI...please also check that the ground screw is installed tightly into the housing..you can see the obvious high voltage leaks from this coil out the sides.. but that brand of china coils.. have an improper internal design...its not quite right.. you can... in case you did not know...operate the HEI out of the engine if its complete...rig up a BAT wire to plug into the cap... to hook to bat Positive..a pair of jumper cables.. both red and black clamps on one end to the negative battery... the other clamps .. one to the housing.. one to a piece of metal.. turn the distributor over.. cap down.. no spark plug wires.. clamp the other jumper cable to ground that metal so the sparks will jump to it...now.. you can spin the distributor shaft with a spare oil pump intermediate shaft or several sizes of heater hose pushed together and over the gear and driven by a power drill.. to see if the ignition coil breaks down..if you are good at bending wire.. pull all the spark plug wires off the cap...bend a LOOP of wire or loop some wire over each terminal.. and loop the end around the terminal end of a spark plug set to .060.. another loop of wire around the shell of the plug and to ground..you can spin the distributor and see if it breaks down.. i don't know what type of ignition you have...but thats where i would start..you might also be having a fuel pump issue.. does the fuel pump hold pressure when you test it.. if not.. i have a fix... it should hold pressure for several minutes.. if it does not hold pressure.. the check valves are dirty.. and its not pulling the fuel up from the tank properly.. and what kind of vent system do you have on your fuel tank...i was on a friends power boat.. only 104' and we lost both main engines and the main generator in mid channel.. 150 foot wide concrete rock lined channel in a 104' wooden boat.. adrift.. because the owner/captian did not believe the vent was off on that totally full fuel tank on the engine room wall.. if we had made it another 1/4 mile out and cleared the channel.. i was going to open that vent as i knew what was coming. but there was only two of us on board.. and i could not leave my watch duties until we got out into la harbor.. the suction prevented the fuel from getting to the engines and all 3 died.. at least i was able to drop the anchor to stop us ..that was one heck of a boat trip.. 3 days from heii..
JordanIf you run the ignition and or the fuel pump directly from the battery, the battery might be going dead. Make sure it is FULLY charged. This means 12.8 volts after it cranked the motor at least once and it sat for a few minutes. Wayne also had a good point about the coil. Keep coils away from heat as heat will drastically reduce the output.Jean Genibrelracerpartsworld.com