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Hey guys, So my Comanche (1989 - 4.0 - Automatic - 2WD - Short Bed) sat for about 2 weeks after I took it out for a mil training event. Just for some background info: before I left for the trip, I replaced the starter and wired in a new turn signal bulb connector since the original was semi-melted and didn't work consistently. Now, when I went to start it, the battery was dead. I have a HALO power bank that can jump car batteries, so I attempted that to see if it'd get it going, but it'd turn over and then die after like 3 seconds. I'm going to trickle charge the battery and see if it'll turn over later, but my main concern was that it was making a clicking noise for a couple minutes after trying. It clicked while completely off with the key removed. Couldn't really tell where it was coming from. I took a couple videos trying to move my camera around and see if it got louder, but it didn't really help much. I am assuming this is related to what killed the battery, since it was doing it while completely shut off. Any ideas? P.S. sorry about the sniffling in the videos lol 649217382_ComancheClicking01(1).mp4 320167470_ComancheClicking02(1).mp4
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1989 4.0 Sporadic Idle and Stalling
Lantresor replied to Lantresor's topic in MJ Tech: Modification and Repairs
Jammed the wire in there like suggested and it went in about 2-3 inches so I think I'm good to just send another bolt. Hopefully... lol Definitely going to tighten them all again once I have that bolt in. Thanks a bunch guys! -
1989 4.0 Sporadic Idle and Stalling
Lantresor replied to Lantresor's topic in MJ Tech: Modification and Repairs
I wouldn't have thought of that lol. I'll poke one in in the morning, excellent idea. I looked at a diagram and it does look like it's supposed to be a stud -
1989 4.0 Sporadic Idle and Stalling
Lantresor replied to Lantresor's topic in MJ Tech: Modification and Repairs
Man that's a terrifying thought. I tried to jam my phone in there and get some pictures of it since I can't get a good look myself. It doesn't look, to me, like it's broken in there. What do you think? Couldn't get a great angle still... -
1989 4.0 Sporadic Idle and Stalling
Lantresor replied to Lantresor's topic in MJ Tech: Modification and Repairs
You called it haha, I am missing the bottom back bolt too. Thanks! -
1989 4.0 Sporadic Idle and Stalling
Lantresor replied to Lantresor's topic in MJ Tech: Modification and Repairs
Thank you, I'll do that next today! I checked the top ones, they were tight and all accounted for. Haven't checked the bottom half yet, but I'll do that today and re-snug them all just in case. -
Hey guys, about a month ago I bought a 1989 4.0 inline 6 that's 2WD. It sounded and seemed to run well when I test drove it, so I bought it and trailered it home. Once I started driving it around, I noticed the idle sounds worse, like it's stuttering. RPM barely changes, though. It also started to occasionally stall when coming to a stop or accelerating from stopped. I got stuck in road work and every time traffic came to a stop, it'd shut off and I'd have to start it back up. I've done Cruiser's tips 1-5 and so far nothing has made a difference. I did a smoke test in several spots and the only leak I've found so far was at the crankcase breather gasket at the back of the valve cover - I have a new one ordered. I've read that the exhaust manifold commonly breaks at the bottom weld, so I was looking to see if any smoke came out there, but I never saw any. Is there a better way to test this? Also I hear a quiet knocking that doesn't change with RPM, I'm going to get a stethoscope to try and figure out where that's coming from. So far I've replaced: Spark Plugs + Wires Distributor Cap + Rotor ICM + Coil MAP Sensor + its vacuum line Both Vacuum Harnesses O2 Sensor IAC valve Big 7 Wire upgrade I'm pretty new to wrenching and I'd greatly appreciate any help or insight. I love this little truck and hoping to get it to a place I can confidently daily drive it.
