Jbro

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!!!

cruiser54

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.

Jbro

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.

Jbro

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 😜

cruiser54

We love updates!!!!

Ricky Glaim

Without map sensor they run like a bag just did this swap pretty easy mosty plug. N play

stubble88

Can I just use the HO dizzy if I have it? And keep everything else Renix?

cruiser54

No.

stubble88

I’m not understanding why indexing is necessary? Or cutting cap or whatever. I’ve got mine on TDC and it’s pointing to the #1 on the cap. What am I missing here?