OtterMobile Posted November 27, 2018 Share Posted November 27, 2018 Hey all, i'm the proud new owner of this '89 MJ. It came with some issues as most older jeeps do. First order of business, clean the throttle body and iac. Trying to eliminate the vacuum leak, which is massive. Kicking out a loud whoosh when i step on the gas pedal, limiting my top speed to 35 mph. PO installed an electric fan to help with overheating, seems to work well, keeping temps at 220 F if i can trust the thermostat. So i'll be under the hood for a while this week. The forum articles on vacuum leaks are helpful. Also i'll be looking for a new flexplate, mine is cracked. Any advice/info on sourcing a new one will be appreciated! Link to comment Share on other sites More sharing options...
grumpiebill Posted November 27, 2018 Share Posted November 27, 2018 Hey all, i'm the proud new owner of this '89 MJ. It came with some issues as most older jeeps do. First order of business, clean the throttle body and iac. Trying to eliminate the vacuum leak, which is massive. Kicking out a loud whoosh when i step on the gas pedal, limiting my top speed to 35 mph. PO installed an electric fan to help with overheating, seems to work well, keeping temps at 220 F if i can trust the thermostat. So i'll be under the hood for a while this week. The forum articles on vacuum leaks are helpful. Also i'll be looking for a new flexplate, mine is cracked. Any advice/info on sourcing a new one will be appreciated! Rock On, welcome to the club. Is this a 4.0 TBI I take it...Sent from my LG-M210 using Tapatalk Link to comment Share on other sites More sharing options...
OtterMobile Posted November 27, 2018 Author Share Posted November 27, 2018 TBI is correct, sir. Carb would have been cool, though! Link to comment Share on other sites More sharing options...
Pete M Posted November 27, 2018 Share Posted November 27, 2018 the 4.0 was always MPI. unless something aftermarket was added. the older 2.5s were TBI. nice truck! I'm loving the bed. Link to comment Share on other sites More sharing options...
Dando Posted November 28, 2018 Share Posted November 28, 2018 Do not buy an aftermarket flex plate, everything available from the big auto stores are indexed inproperly and your truck will not run right after install. I found this out last year sadly, spend the time to find a stock takeoff Link to comment Share on other sites More sharing options...
OtterMobile Posted December 13, 2018 Author Share Posted December 13, 2018 Thanks guys, i'm into the vacuum lines next. So helpful that every problem ever had with these trucks has a thread going about it. Shout out to Cruiser54's mostly renix tips! Link to comment Share on other sites More sharing options...
Articul8 Posted December 13, 2018 Share Posted December 13, 2018 Welcome man. digging the bed its pretty sweet. Link to comment Share on other sites More sharing options...
OtterMobile Posted December 15, 2018 Author Share Posted December 15, 2018 (edited) Right on, thank you sirs. The bed will get a headache rack once i get a hold of some stainless 2" square tube. Should i put a side dump exhaust??? Kinda want to go "full yeetard" on this project Edited December 16, 2018 by OtterMobile Link to comment Share on other sites More sharing options...
JMO413 Posted February 10, 2019 Share Posted February 10, 2019 Good looking truck you got there. Side dump exhaust for sure! Link to comment Share on other sites More sharing options...
Darren Posted February 11, 2019 Share Posted February 11, 2019 Why not do stacks? You said you wanted to go "full yeetard". Link to comment Share on other sites More sharing options...
OtterMobile Posted May 5, 2019 Author Share Posted May 5, 2019 Cracked flexplate: replaced Cracked exhaust manifold & plugged up CAT: replaced Cracked head stud replaced Leaky radiator: replaced New starter, cap, rotor installed Soon: Slip Yoke Eliminator OTK steering kit Rear bumper w/ taillights that work Stacks would be fun but i went the (somewhat) less expensive route.. Pics too large to upload, will post the img's when i get them compressed down to CC's standards. Link to comment Share on other sites More sharing options...
Pete M Posted June 12, 2019 Share Posted June 12, 2019 any updates? Link to comment Share on other sites More sharing options...
OtterMobile Posted January 14, 2020 Author Share Posted January 14, 2020 Sorry for not updating. I haven't had much time to work so there's really nothing much to update, but while it's been sitting in the driveway I'm going through Cruisin54's mostly Renix tips like refreshing the ground at the oil dipstick tube, sensor grounds, checking all connectors and relays under the hood. I didnt use a spray cleaner like he says to on the site, i just wire brushed and used dielectric grease. Hope that's good enough. Also got to get a rear bumper welded on and finish the tailight wiring. The PO did electrical installs for fire departments so there's a huge panel behind the driver's seat I get to decipher how to use. Looks like a clean job, I just got to figure out what's what. Link to comment Share on other sites More sharing options...
Pete M Posted January 14, 2020 Share Posted January 14, 2020 that is shockingly clean. not one of the POs of my rigs was that thorough. Link to comment Share on other sites More sharing options...
High2by Posted January 14, 2020 Share Posted January 14, 2020 9 hours ago, OtterMobile said: The PO did electrical installs for fire departments so there's a huge panel behind the driver's seat I get to decipher how to use. Looks like a clean job, I just got to figure out what's what. Wow!! Link to comment Share on other sites More sharing options...
DesertRat1991 Posted January 14, 2020 Share Posted January 14, 2020 1 hour ago, OtterMobile said: Sorry for not updating. I haven't had much time to work so there's really nothing much to update, but while it's been sitting in the driveway I'm going through Cruisin54's mostly Renix tips like refreshing the ground at the oil dipstick tube, sensor grounds, checking all connectors and relays under the hood. I didnt use a spray cleaner like he says to on the site, i just wire brushed and used dielectric grease. Hope that's good enough. Also got to get a rear bumper welded on and finish the tailight wiring. The PO did electrical installs for fire departments so there's a huge panel behind the driver's seat I get to decipher how to use. Looks like a clean job, I just got to figure out what's what. POS 1 POS 2 DECKS FRY OUTER CORN ALLY ALLY ??? ??? Very curious! Link to comment Share on other sites More sharing options...
eaglescout526 Posted January 14, 2020 Share Posted January 14, 2020 Ok I wasn’t the only one who saw corn. Link to comment Share on other sites More sharing options...
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