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  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!

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  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!
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Rock On, welcome to the club. Is this a 4.0 TBI I take it...

Sent from my LG-M210 using Tapatalk

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the 4.0 was always MPI.  unless something aftermarket was added.  the older 2.5s were TBI.

 

nice truck! :L:  I'm loving the bed.  :D 

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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

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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!

 

 

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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

2018-12-14 jeep comanche.jpeg

Edited by OtterMobile

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