4.0 H.O to Renix swap.
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Year: 1990
Model: Cherokee(XJ)
Engine: 4.0 HO
4.0 H.O to Renix swap.
Hey everyone I am new to this site and new to discussion forums in general so here I go I need some help from fellow XJ owners! So I had a 92 with the 4.0 H.O it failed local smog so my chance at classic vehicle registration which for Nevada means "emissions exempt" is out for a year. The XJ had excessive rust issues but ran well! Well I bought a 90 XJ off a customer last year she overheated it and seized the motor, she didn't want to spend the money so I got it. Well I decided to swap engines from the 92 to the 90. It has fought me every step of the way so far. The 92 has a manual transmission so I had to figure out a way to get pilot bushing out of the crankshaft, did that then I figured I would freshen the motor up and do a timing chain and gear set and rear main seal and oil pump etc. well I kept the H.O head and everything bolts up but the jeep runs so rough. I had to relocate the coolant temp sensor because the square drive plugs on the block were stripped. Well I replaced the vacuum harness and found my EGR solenoid was stuck wide open so I have bypassed that for now. But this thing is sputtering on acceleration and off idle. It's running extremely rich, I will lift the fuel rail tomorrow and see if I have a leaking injector. But since the ports of the heads are same size but shaped slightly different is sputtering a fact of life or is something else going on ? Anyone who has done the H.O to Renix swap what can I expect as far as Performance? Anything else I should consider? Thanks again!!!
#2
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Here's all you need:
http://cruiser54.com/?p=100
Have you indexed the distributor?
http://cruiser54.com/?p=68
Which intake gasket did you use? Must use the Renix one.
Need to get the CTS in the correct place if possible.
http://cruiser54.com/?p=100
Have you indexed the distributor?
http://cruiser54.com/?p=68
Which intake gasket did you use? Must use the Renix one.
Need to get the CTS in the correct place if possible.
#3
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Thanks, yea I know my distributor is spot on I did index it. The cts is in the spot for the H.o sensor on the thermostat housing not much I can do being the plugs are stripped. That was a very in depth write up. Thank you so much! I used the Renix intake gasket.
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Hey just updating ya! So it turns out one of my injectors were wide open just dumping raw fuel. I also ended up re routing the vacuum line to the map sensor it was hooked up to the port that has no vacuum 😜
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