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Abe Scott

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Everything posted by Abe Scott

  1. Update: I think I have got it after all the work, time, and money spent. I started checking again I found an unbelievable vacuum leak around lower intake manifold. replace gasket today runs great thanks for all of the support. something that simple fix. when the engine was swap the starter was replaced. The gasket moved or something apparently cause a vacuum leak. I had no idea a vacuum leak could cause random misfires. I was sure it was an ignition problem.
  2. I did not find evidence of broken wire or shorted connection in the wiring harness. so at this point I will retrace everything that I have done, perhaps I have over looked something. I will start with ecu
  3. It is possible that the undercharged battery is destroying you alternator. the alternator trying to support the load of ls400
  4. I inspected the injector connectors, checked continuity from ecu to connectors Just to be sure I am changing the connectors. I did find a vvti connector not latching. will continue testing
  5. thank! you I will inspect the injectors connectors and wiring I have already done the coil connectors.
  6. again sorry for the confusion. Okay the the random misfire occurred before the swap of engines and it exist today. Random misfire and code for random cylinders. I did replace the injectors, the throttle, the cop and plugs. I played the parts game the o2 sensors have all been replaced, the MAF sensor has been replaced, VVTI controls have been replaced, fuel pump has been replaced and TPS. I don't what to do next I have owned the car 1 year and 7 months I have no been able to drive it more 22 miles at any time. rough Idle. sometimes limp, sometime poor shifting trans, VSV and CEL same codes for random misfire. sometimes CEL flashes. I have use my scanner and 2 other same results random misfire Code . could a short in the wiring harness cause this condition of misfiring. It's the only thing in common before and after engine swap.
  7. Thank you for the codes these are the codes especially P0300 for random misfires I have been getting. Thank you again still can't seem to solve the issues with the misfires. as I said I replaced part that may cause this condition.
  8. again sorry for the confusion. Okay the the random misfire occurred before the swap of engines and it exist today. Random misfire and code for random cylinders. I did replace the injectors, the throttle, the cop and plugs. I played the parts game the o2 sensors have all been replaced, the MAF sensor has been replaced, VVTI controls have been replaced, fuel pump has been replaced and TPS. I don't what to do next I have owned the car 1 year and 7 months I have not been able to drive it more 22 miles at any time. rough Idle. sometimes limp, sometime poor shifting trans, VSC and CEL same codes for random misfire. sometimes CEL flashes. I have use my scanner and 2 other same results random misfire Code .
  9. trouble codes are just always random misfire with P0305, 307 and so on. no code for any remotely like o2 sensor
  10. sorry for the confusion I meant the the throttle body and the injectors which are in the fuel rails
  11. I have a 99 lexus ls400 I have swapped engines condition existed before swap I replaced plugs and cops before swap replaced map sensor , changed upstream and down stream o2 sensors. also replace throttle body Injectors have been replaced all that has been done my time and money. I forgot replace tsp yesterday. Help me please I have followed theads and post. I am close to dismantaling this thing code for random misfire. vsv and cel are on not alway at stratup but
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