Rockfrog

Well, good thing I changed the rear system out ... Went to pull the hose garden aside for better access to the offending rotten one ... The whole works fell apart at the fittings. The whole rear circuit was rotted from the front edge of the gas tank back. Replaced it in three sections, prop valve to just in front of crossmember. Junction. 60" line bent to just behind gas tank. Junction. 24" section bent to the soft line. Gravity bled it to the soft line with nice new fluid. Made an air filter mount off the inner fender. Used an old generator "foot" and the old pressure tank strap. Started slinging the front axle up and ran out of daylight. Solved the high idle issue with another IAC and that made my day. She purrs better than my 2000.

Another HO IAC later and we have a nice 600rpm idle. The first HO IAC was a dud it would seem. I also tried a renix IAC with a HO Pintle on it .... But for got to hook up the ballast resistor and thought it was a no go. Didn't realize my mistake until the third HO IAC was on. I'll try it again at a later date. As of right now she's purring like a kitten ... A happy 4.0 is a beautiful sound. I'll snap a picture of the various IAC's it looks like the renix one with an HO tip should work as well, and give better wire plug angle to boot.

Made a new intake pipe, used an edelbrock filter (cheap enough to replace instead of cleanning). Swapped in an HO tps... Idle is now at 1250 instead of 15-1700rpm now. Started working on the brakes, swapped in an XJ prop valve for simplicity's sake. Burp and burped the cooling system and added and electric fan since I happened to come across one. Probably wire it through a switch of some sort (either manual or temp activated). And how she sits now, drivers fender is crap, but I'm having trouble finding another so it'll stay for the time being.

Well swapped in a 94 IAC, it idled at 700 for a few seconds then stuck at 1250 now, so bit better. The IAC housing looks bent a bit so I'll try swapping it and the housing again. I can live with it for now, and worry about it after she's on the road again. Unplugged the ect and saw no change. Hopefully it's not another dying tps again (that's what my last high idle was). Ahhh .... The never ending joys of Jeep.

Exhaust almost hodge podged together (to get it to the exhaust shop). Brake Line that blew was the mainline and popped right behind the tank. Dammit! Pulled the line and flared it right after the cross member, then a Junction and standard store lengths from there to the rear soft line. Adding an XJ prop valve at the same time to end the mess. The stock prop valve worked fine, but just more hassle to keep it right now. Might put it back later. Or not.

I have the spare water pump from my 2000 on my 88 currently ... Same pump as what I pulled off the 88. A 4.0 water pump is a 4.0 water pump. Apparently also fits the 2.5 as well, from my research to date. In my case all the pumps are Carbone and have never had an issue.

I tore into my engine as a result of severe "ticking" ... Found two Rocker bridges twisted making four rockers very loose. Also found the usual rear exhaust manifold stud broken. Dubbed her 'Ole Ticky Since I had bearing I went under as well and found slightly worn rod bearings and good mains. A video or sound clip would go a long way in helping diagnose. Lots of things on a 4.0 "tick"

Picked up and HO IAC today when I was down Island (island cup 2014 4x4 event) This is how my tps is mounted, just got home have yet to install it. More details in my build thread.

Or for $50-100 you can swap a later XJ axle (or if earlier a limited) in there with no issues. He'll, I run an 89 limited housing under my 2000 XJ on 35s .... Got it for $25 complete ... Sold the guts for $50.

OK, so what we have here is not the usual high idle thread. I've completed the HO head swap, used a 99+ intake, 94 throttle body, 92 head and exhaust. Used the Renix TPS, and Renix IAC. Read somewhere a while back to use the renix IAC with the HO throttle body. Got her fired up and she sounds great, but idle is at 1500rpm now. No vacuum leaks, good seal on intake and TB. The HO IAC looked longer (on the inside) and I am thinking that's where my problem lies ... Anyone able to confirm? I should be able to grab a used HO IAC tomorrow, but just wanted to check here and hopefully move onto other issues .... Like getting the front axle attached. Anyone? Thanks in advance.

Ended up bending the pedal to make it all work perfectly. Swapped in a 92 tilt column, primed the motor and started plumbing and bolting stuff back on. 97 power steering pump pulley was bent so swapped the 88 pulley onto it. New PS lines. Got a major thing covered too ..... Made TPS adapter plate and mounted it all up. Hopefully she'll be good to go come start up. Made a main plate to adapt the patterns, used an 11/32" socket for the throttle plate adapter (fit better than the stock bit did) drilled it and press fit a chunk of an Allen key so it rests at 0.8262V (reference was 4.86V) once installed. Finally got to chopping and splicing the ECT sensor wiring. Used a Dayco 5061000 belt for the accessory drives. Ran new 3/8" brake line for the CCV, and 3/16" brake line for the MAP and FPR lines. Plumbed in the rest of the vacuum lines using rubber. And a shot of the exhaust manifold gussets .... Hopefully this will prevent future cracking, we'll see. Just need to plumb the exhaust and add an intake hose. Then a bunch of quick stuff by comparison, hope to have her back on the road for next week, paint will have to wait till later. Wheel bearings, rear brake handline and re-attaching the front axle are the number ones.

Well, we didn't want to say anything but .... Are there really only 4 of us igloo dwellers? Be right back ... Gotta go call my pet moose back... [emoji12]

Valve seals, pop the cover, then just remove rockers and Springs. Keep everything sorted to its exact position as they will have worn in by now. Easy fix but takes a bit of time. Seals are cheap.

Rotella T6 5w40 year round in the 00 XJ and the 88 MJ, otherwise it's 15w40 Rotella T3 when hotter. My 88 manual specifies 10w40 for my temp ranges around here, but the lighter flow at start keeps things quiet.

I just made my own for my 88, a 10mm all thread connector, a drill, and a knob of my choosing, all a little 'no more nails' construction adhesive amd she's been good for over a year now. The only picture I can find of mine.

Never mind, reread again. Clean the plug and test voltage at the plug, the 93 system should be pushing at least 30psi ... more if you disconnect the FPR vacuum hose. May also have a bum FPR or a restricted fuel line.

Being on Vancouver Island up in Canuckistan, I'd be willing to travel a few states for something like this. Hopefully the truck will be ready, but always have the XJ as well.

Not much time today, got the valve cover bolted down, oil filter on and filled with oil. Pulled the water pump and added the newer water neck. Dropped the throttle body in place and hooked up the cable... OK, so now a new issue I never knew about... . The cable spacing is different. SURPRISE! shoulda seen this coming and measured first. Only get about 1/4 throttle openning. Two way I see to fix it. ... bend the top of the throttle out to take up the slack, or hack the cable accordingly. I'm thinking bend the pedal so my cables will all be stock swaps. Any other ideas, beside the obvious HO pedal swap (no donors near here).

And the reasoning behind swapping to HO stuff and not getting a bored our Renix TB fro Leigh Machine is. .... he will not ship to Canada. So, adapt a sensor I go.

Generally it rarely gets mentioned. Common practice is to good and goop the rubber yoke seal (looks like a little black rubber spikey washer). This ensures no oil oozes between the yoke and shaft.

decided I wasn't quite done yet, made a new home for the Renix ICM and coil assembly. Then stripped the flares off the old fenders, in prep to move to the new fenders. And... That's a day

Sept 18, 2014 Hammered on the truck again today ... Rear main seal replaced (main bearing looked much better than the rod bearings - that made me feel beter), oil pan on, OFA back on block. Got the intake and exhaust manifolds on and Torqued down. Pulled passenger fender and got new 2000 XJ fender on and lined up. She's starting to come back together. I think the XJ might be getting jealous, front end has one heck of a creak going on in the turns, hope it's just something that loosened off a bit.

Sept 9, 2014 I had to vacuum out the lifter well, had two drains fully clogged with crud. Wasn't unexpected, the valve cover and rockers looked like the timing cover when I first got her. Oil pan wasn't much better. Should be OK for a bit once I get it back together, but I'll be on the look out for a new short block anyway. As it goes back together, it'll have a 92 head (7120), 00 intake, 94 header gusseted against cracking, 00 valve cover and CCV layout, 97 ps pump and brackets, new timing set, stock HO throttle body (may try dropping to a 2.5L TB if I need to - about equal to stock renix 4.0 TB from the looks) and Renix efi. Should work fine, just need to find a 1990 Renix 4.0 5spd PCM to complete the motor. It's getting 97 up front clip, and a 92 8.25 (for the 3.55s and since I couldn't find a 96 up 29 spline, but with 31s and 2wd that should be fine). Custom cowl hood (driver side only) And a shiny blue metallic paint job in redneck rustoleum (can't go getting fancy now). On the future list is a 94 ax15 and 231... Then a d30 in 3.55 when I get around to it, and a rear disk swap. Getting it back on the road is priority right now, she's just a fun truck to drive

Sept 8, 2014 So installed new timing gears, cleaned and painted the timing cover. Reinstalled, pulled it to put the oil sands need back on, the put it back so I could pull it again. Forgot the tension slider, so another reinstall ... Yeah it was one of those days. Got the head back on, changed the rod bearings (since I had some), cleaned and painted the oil pan, and a bunch of other minor crap. So, hopefully I should be tossing the intake and exhaust system on when I get back. Hopefully should be ready to start before the end of that shift. Missing the MJ right now.

Sept 7, 2014 Well, finally got some jeep time ... been fighting with the motorhome all summer. Changed the rod bearings, no big deal, probably won't make much difference. Started pulling crap off to change the timing gears, and pulled the ECT sensor on the block and plugged with a 3/8" plug. Going to run it on the thermostat housing. The stock wiring can be rerouted without issue. Changed the water pump (used the spare from the XJ). Then pulled the timing cover off .... :o Further leading me to believe I may be the only person to have changed the oil since it's first service call. Scraped more crud in the lifter well, and now need to shop vac that junk out. At least I've reached the point where it's going back together.