New to Cherokee land from TX
08-18-2008, 06:17 PM
#1
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Year: 1987
Model: Cherokee
Engine: 4.0 Renix, Oh Yea!
New to Cherokee land from TX
I'm new to this whole Jeep thing and will no doubt have a bunch of ???'s... I have a 87 Cherokee Laredo with a 3" Skyjacker lift and 31" Procomp tires.. it has a 4.0 in it and has very little get up and go in it.. No idea why.. it has 181K on it.... and one day I will post a pic of it...
08-18-2008, 06:36 PM
#2
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Location: Helena, Montana
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Year: 89
Model: Cherokee
Engine: 4.0L
Welcome from Montana! For your info, you've got a Renix era engine in your Jeep. Very easy to diagnose with nothing more than a little time and a good quality digital multi meter. Check out this thread: https://www.cherokeeforum.com/f51/helpful-renix-links-1397/. It will provide you with ton of good info regarding your Jeep.
08-18-2008, 08:49 PM
#5
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Join Date: Apr 2008
Location: Smiths Station, Al
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Year: 87
Model: Wagoneer
Engine: 4.0 I6
IT is a great thing plan on getting atleast 400k in mileage on there. Get up and go well its a jeep so Dont expect a lot lol. I own 2 87's and neither one acts like it has a 6 cylinder except when you are on the trails.
08-18-2008, 09:22 PM
#7
Do you hear banjos?
Renix era XJs came out in 1987. Prior to that there was no 4.0 availible, just a 2.8 liter V-6 A.K.A. GARBAGE!! No offence 2.8 owners, it's still a Jeep!!!
They also had a 2.5 liter four cylinder engine, which was the better of the two, IMHO. In 87 Jeep released the 4.0, it had the Renix electronic fuel injection system on it. They went to the H.O. version in 1991, and everything about the fuel delivery was changed on the enigine. They are basically the same block with different intake manifolds and electronics. The Renix models are easier for the garage mechanic to work on because the system is very simple, and based off of resistance levels through the sensors. Once you figure out what the "loads" are supposed to be at a given sensor at a given time, they are easy to diagnose, and fix from that point. This is where the links that were offered in the arlier posts come in handy. BTW, welcome to CF from COS!!
They also had a 2.5 liter four cylinder engine, which was the better of the two, IMHO. In 87 Jeep released the 4.0, it had the Renix electronic fuel injection system on it. They went to the H.O. version in 1991, and everything about the fuel delivery was changed on the enigine. They are basically the same block with different intake manifolds and electronics. The Renix models are easier for the garage mechanic to work on because the system is very simple, and based off of resistance levels through the sensors. Once you figure out what the "loads" are supposed to be at a given sensor at a given time, they are easy to diagnose, and fix from that point. This is where the links that were offered in the arlier posts come in handy. BTW, welcome to CF from COS!!
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