shortee1fourtee

I have checked the pigtail and I couldn't find anything wrong. And I confirmed I do have spark. I also used a testlight and with it running you will notice the light pulses with all the other injectors which is normal , but on number 2 injector the light is constant and really bright. Also I noticed if I unplug the distributor, then i start getting this crackling like an electrical short coming from the injector #2.

Hey everyone, I’m seeking someone with any knowledge on repairing an ecu for an 89 renix ecu. The first ecu went out and I got a replacement but shortly after the second one did the same as the first. My #2 cylinder fuel injector isn’t working. I found my fuel tanks had alot of rust in it. Which caused my injectors to clog up and I guess it caused the ecu to get hot which lead to the #2injector to quit. I have already installed a new fuel pump, got rid of the rust in the tank , new fuel injectors, now I just got to get #2 injector firing again. Any assistance will be greatly appreciated!

Does anyone have a link to a good well built replacement fuel tank and a fuel pump assembly for my 89 2wd 4.0l ? Please and thanks in advance

I have not pulled the pump. That is my next plan. The tank is down to a quarter tank of gas so I may drain it and clean it as well. But it cranks and idles fine. When you leave out on the highway , you can only get to maybe half throttle before it begins cutting out. And after that, it’s slowly over the next few miles get worse until you have no pedal left before it’s cutting out

Right I check and no vacuum leaks. The sound appears to be coming from crankshaft sensor location. And also I changed fuel filter and besides the whistle sound the truck ran great yesterday afternoon……. This morning, right back to doing the same thing.

Yes 89 4.0 in-line 6. And 2 day of consistent use.

I'm going to assume this is a fuel issue. But it’s like there’s no end to it. The truck cranks and Idles fine. As soon as you get on the road, it skipping, sputtering, and barely get 30mph out of her. First it was a fuel injector. I found I had a dead injector by pulling the wires to each listening for a change in the engine. Ok replaced it, ran great for 2 days. Then same sh*t again. Seems it was a plug, so replaced plugs and wires, again , ran good for 2 days and back to skipping. I found the intake and exhaust manifold bolts were finger tight. Replaced the gasket, And torqued everything down. You guessed it…….2 days. Then another injector, got another 2 days. Anyone else noticed the pattern here? Yea , I’m losing my patience. Fuel ballist resistor or whatever it’s called seemed to have corroded plugs, clipped cleaned and replaced. 2 days again……..over and over. The fuel pump sounds to be working fine. So wtf is going on? Also I replaced the crank sensor and I got a loud whistle almost like it has a turbo on it now.

Good point Eagle. I would like better acceleration and low to mid-range performance for sure. I guess I’m mainly looking at my options, different routes to take, and seeing what interchangeable parts are out there that will improve performance at a low cost. Money is tight, but gathering all the info and advice from everyone here at CC will help me come up with a game plan and point me in the right direction. I’m a knowledge junky, so to speak,🤓.

Well thats no good cruiser54. I was really hoping to catch a break for once, well I guess I will return it and order another. Thanks for the info . And hey Pete, was wondering if you knew what came with the 05 Jeep Grand Cherokee with the hemi in it? Just curious, because my friend has one he just pulled the engine from for his truck. So I could get anything else off of it for near nothing.

anyone can confirm whether or not I can use this?

Also I have a small issue at this very moment in time. Ordered a new intake/exhaust gasket for the 89 stock 4.0 due to mine was leaking and just old. But the dummy’s sent me one that was for a 99 to 06. Website says it’s not compatible with my truck but placing the old one side by side with the one they sent, I really can’t see much difference. I can return it and get my money back. But due to the holidays it will most likely be next Monday before I get the other gasket. Can this one be used? Like. I said the bolt pattern matched perfectly, and I really need to get it back together asap.

Very true words Pete, but even with a few more horses, it still beats the old 81 Dodge d150 v8 I have also….man that things loves some gasoline. 😂 Also thanks cruiser for the tips. I’ve already been in the process of going through your list of tips. It’s a lot of help and much appreciated. Jpnjake, what year model explorers came with the rear end you mentioned?

Is there a swap for the rear end? Or is it something that’s I’m gonna need to tear down and rebuild myself? Either is fine, just curious.

Hello all, and thanks in advance for any suggestions or help on the subject. I’m sure I speak for more than just myself when I say at this point in time, Money is TIGHT! lol As much as I would love to build a brand new engine overhauled and filled with all the goodies available, I just can’t at the moment. But I am looking to squeeze in a few more horses in the ol’ straight 6 if possible, and who else better to ask than the Comanche club family ! Was curious if there are any interchangeable parts I might could find at places like pull’a’part, maybe cylinder head for better performance, intakes, etc etc.

Sorry, I know everyone is got to be getting tired of me asking for help. Lol I drove all summer without a thermostat because it was like that when I got the truck. But winter is coming, so i bought and installed a thermostat. Couple miles down the road i noticed It was beginning to run hot. So being i was on the side of the road, i just removed it for now and proceeded to head home. But now its running hot without the thermostat????? What happened????