I am desperately searching around ih8mud for a fix a. A year ago my son and I picked up this LC with a blow head gasket, head is back on after being completely reworked by a local shop. We have spark, compression and fuel. While the head was away we resurfaced the fuel tank, replaced a bad fuel pump, blew out all the fuel lines and replaced the fuel filter. We also replaced the bent push rods before the head went on, and inspected all the lifters. We have adjusted the valves to spec. We replaced all gaskets, the water pump (OEM), t-stat (OEM), new spark plugs. Currently if starts at each kick, while it sounds smooth (loud fans noise and no obvious misfires) it just lunged straight up to approx. 3000 RPM, then immediately drops back to around 800 and back up to 3K and so on, all with no input of the gas pedal and no movement in the throttle body. We have cleaned and bench tested the TPS. What would be you next logical steps? Three young boys dyeing to go camping after a lot of work and we are in the +200,000 LC for just over $7,500k.
Prior to getting it to fire recently as stated above it would crank but not catch and then it finally it back-fired a bit out of the intake with the fresh air intake disconnected from the throttle body so we quickly realized we did not have basic timing correct and reinstalled the distributor correctly to get to this point now it runs but with this extreme lack of idle. Once I can get it to level out anywhere we intend to adjust the valves again and set the timing precisely.
Very concerned about 3k RPM on a rebuilt head that needs to properly break in with very expensive break in oil. We have yet to let it run for more than 5 to 7 seconds.
Thank you in advance for any assistance.
Prior to getting it to fire recently as stated above it would crank but not catch and then it finally it back-fired a bit out of the intake with the fresh air intake disconnected from the throttle body so we quickly realized we did not have basic timing correct and reinstalled the distributor correctly to get to this point now it runs but with this extreme lack of idle. Once I can get it to level out anywhere we intend to adjust the valves again and set the timing precisely.
Very concerned about 3k RPM on a rebuilt head that needs to properly break in with very expensive break in oil. We have yet to let it run for more than 5 to 7 seconds.
Thank you in advance for any assistance.
