I am putting a 1993 chevy TBI 4.3 "Z" motor in my old jeep. I had a harness made from painless and I recently started it up for the first time the motor sat for three years once it was pulled from a good working truck in the back of my shop all covered up. I recently put it in my jeep and it started quickly but ran like total garbage. I noticed that one of the injectors was not firing. So I took an old wire harness and took off one of the injector plugs and hooked a nine volt battery to it and it worked like a champ. Great pattern and all. So then I thought the ignition control module was bad so I replaced it still ran poorly and didn't fire on one of the injectors. I then thought that perhaps the harness was wrong so I pulled the ECM plug back out and the injectors where on a16 and a9 like they should be. The only items I have left to replace is the ECM, MAP, TPS, temperature sensor. However before I put anymore money in to this do you have any other suggestions. I also cleaned the engine ground and hooked it straight to the negative terminal. I AM LOST PLEASE HELP!
Thank you in advance too.
have the same problem?
Wednesday, October 14th, 2015 AT 9:59 PM