Search the Community

Recently I did some "repairs" to my 89 MJs HVAC system, new Blower + resistor, bunch of other crap. I've been experiencing a phenomenon that I don't remember pre-HVAC repairs where the Blower slows to an almost stop when I'm accelerating up a hill and the RPMs are high, once I get to the top and shift, the blower speeds back up. The problem is I almost never notice it untill it speeds back up so I'm not positive on the conditions which it occurs. I just know I notice it more when climbing hills. Could this be a battery problem? I was thinking vaccum at first but there isn't any lines in the blower that I can recall so that doesn't make sense.

So I have some time and I decided to pull my dash and HVAC box to fix my water leaks which I originally thought was coming from the fresh air intake but it appears now it's all the blower motor seal/foam. When I pulled the dash I discovered all kinds of exposed wires, dirty grounds, smashed/pancaked heater tubes and all sorts of nonsense so I'm making it a general clean up. It was also an excuse to put as much Dynamat (well, a knock off) on the firewall as I could. Anyway, now that I'm sitting here with this nonsense, I'm kind of regretting it... I didn't find it all that complicated to take apart. It was pretty straightforward, the issue is just the foam is all rotting and in horrible condition. The only part's I can find are these but they're listed as 97+ and I have an 89. They look right but even if I got those and they worked all the blend door and interior foam is trashed. In another post I found that someone used this product for the blower/fresh air seals and this for the blend doors. Mine is in good enough shape that I could probably use it as a template so right now I'm leaning towards that being my best option but I'm curious if anyone has any magical suggestions (besides set it on fire). There's way more foam in the box than I thought there was. I'm going to replace my heater core/evap/blower while I'm at it but that's pretty much killing my budget atm lol.

I found me a project truck and want a/c in it. I am looking for the HVAC Box. Does not need to have fan, but would be a bonus. Needs to be a/c box since I already have the heat only box. It is for a 1988 Jeep Comanche 4.0 Pioneer. I am located in Dallas Texas and looking to spend no more then $150 for the box without fan. I already have dash torn down and new heater core and a/c under the hood hooked up. Just need the box so I can put evaporator in and put back together. I finished putting in a 4.7L ATK Crate Engine and a nv-3550 trans with the np231. I would like to finish off the inside of truck now before I paint it.

Ok guys I've had my 88 comanche MJ for almost a year now I bout it without heat in it. My truck actually has a dash in it from like a 98 and there is no heater controls in it the vac lines and everything are there but no controls I phisicly have to get out of the truck and plug in a plug to turn my defroster on...but guys I'm looking for some heater controls with the vac line plug and electrical plug on the back just in case for my 88 comanche MJ I have no heat right now and hunting season starts in a couple weeks and I need to get this fixed so I don't freeze..something local would be great but I would be willing to drive an hour or so to get them if I had to I'm located in NE PA outside allentown let's see what you guys got