1994 Dodge Dakota Repair Question
Asked on August 1, 2012
When the engine reaches operating temp the engine starts to misfire and loses power
The engine was rebuilt 10,000 miles ago. I did perform a compression test and it has 150 psi on each cylinder. It is a V6 3.9 MPI. There are no codes showing on the computer. I checked for 12 volts at each injector and checked the wiring per instruction book back to the computer connector. I installed a new coil. It has new water temp sensor. I had rechecked the timing in the distributor and verified it was correct. I installed a rebuilt computer in case the board was breaking down. When the engine is warm and I go to test drive it and put it into gear is when I start to notice the popping in the exhaust system. Upon accelerating it feels like it is dropping cylinders. It does not have any power. I did not try driving it when it is cold yet, but I will. I need help. Any suggestions??
Asked by dmel340Answer
Replied on August 1, 2012
check the fuel pressure 35-45 psi. also check vacuum on intake if 15" or belwo suspect a clogged converter
Replied on August 2, 2012
the truck has new fuel pump and is at a steady 40psi. the cat is new and I did separate at inlet side inspected and used a shop vac on blow and it flowed free.
Replied on August 2, 2012
check for vacuum leaks with choke cleaner and check resistance of injectors they should be 13.3-15.7 ohms. the only proper way to check injectors for voltage is with anoid light.