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Showing results for tags 'jeep 4.0l'.
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So I picked up a 2004 XJ 4.0 engine and didn't realize the many differences in the block casting from the older 4.0. It wasn't until I started doing more research on the engine that I realized this, but I did get the engine for a really good price that was too good to pass up. Being that I've already put in some time into this engine, I HAVE to make it work. The first issue that I ran into was with the driver's side motor mount pads on the block. on the older 4.2 and 4.0 engine, the top bolt pad is pushed back about half an inch, and on the XJ 4.0 they are flush with each other. So, I we -
I am trying to find the cause of a rich running engine, and I'm running out of ideas of what to do next. History: Wife bought me and my son this Jeep sight unseen a few months back for us to fix up. 213,000 miles Initial engine problems identified: Heavy exhaust smell, cracked exhaust manifold, Clogged CCV valves with oil bypass in air filter. Overall the jeep runs great other than the strong exhaust smell and bluish smoke from exhaust pipe. No noticeable power difference from other wrangler 4.0s i've driven. Haven't driven it enough to report on gas mileage. Smell is too har -
There has been a long thread of exchanges at Timmy960's topic on harsh shifting after rebuilding an AX15 transmission. The problem around 3rd/4th gear shift issues has a basis in the redesign of the synchronizer sleeve, bronze blocking rings and the third gear cog teeth for the sleeve engagement. Jason Logan and I had an exchange about this issue when he rebuilt his '99 TJ Wrangler unit. That exchange was just prior to the launch of the forums. For the benefit of all AX15 rebuilders, I am starting a new topic around this issue, beginning with the in-depth Q&A exchange that Jason Logan -
Hey I was looking to upgrade my 1998 Jeep Cherokee SE’s ignition system. My intent is to drop the distributor and replace it with a camshaft synchronizer (https://www.morris4x4center.com/dorman-camshaft-synchronizer-oil-pump-drive-includes-sensor-dor-689200.html?gclid=Cj0KCQjwn7j2BRDrARIsAHJkxmw1PJPPvcy8YpgleZmsRNOW_q9zw78_4IXXuvfIbh7uufSEW3rMaaEaAtSzEALw_wcB) , and a RIPP 3.8 High Performance Coil Pack (https://rippmods.com/collections/jeep-wrangler/products/ripp-3-8-high-performance-coil-pack). “Viper Coil Kit” Will this work with my current wiring harness and PCM? or will I h -
The owner of a 1998 Jeep Wrangler had several questions about the use of a CompCams 252H grind camshaft in a Jeep 4.6L stroker inline six engine build. His engine core is a 1998 Jeep TJ Wrangler 4.0L...Here is our exchange. My comments are in red: Keith M.: I’ve seen some posts, including on Comp Cams’ site, that say the head on the ’98 has different size valve stems than other years and that cams that will work on other years won’t work on this one. I’m pretty confused by what seems to be conflicting and unreliable information. Moses: I’m not clear why there is so much confusi
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Moses, I have watched your videos regarding how to approach a stroker motor. I have read tons of info on the internet, and I've seen many calculators for quench height, combustion cylinder volume, etc. It really is baffling to me, and I've begun to realize I could invest a lot of money and end up with an engine that doesn't work. Is there any identifying info on the block that would allow you (or someone) to write me a "recipe" for what parts I need to build up a stroker? I'm realizing that the added weight of the full size truck axles and 38" tires are going to necessitate more power. -
New here and tried searching but came up with nothing similar. My 06 LJ 4.0 (155000 miles) recently developed a habit of going to a fast idle/high rev of around 1500 RPM's or so. If I blip the throttle it settles down until you take of again and it repeats. I installed a Genright 31.5 gallon fuel tank and replaced the fuel pump assembly at the same time because it was a whole lot easier and I didn't want to drop the new tank anytime soon. I had a code for EVAP system small leak which I attributed to the vent hose from the tank to the filler neck as the hose that came with the tank was rath -
hi what distributors you recommend for standalone jeep 4.0 ( with cam and crank sensor ) coil pack ( 6 ) -
Hello, I have some trouble with mpgs, idling and acceleration on my Wrangler YJ 1995. 4.0. Recently went to a mechanic, he connected my PCM to a DRBIII scantool, and he told me that the adaptive factor is -80%. He did reset all adaptive memory, and I can feel improvement in mpg and acceleration. Is there any way to reset adaptive memory other than connecting it to a scantool? I've read on internet about touching positive and negative cables (or grounding postitve), that it empties the capacitors in PCM adaptive memory. The reason I'm asking this is because I don't have scantool availabl -
I am working on a 2002 Wrangler 4.0 automatic. I found this connected grounded to the left side of the block. I have no idea what it is or what it does. Any help would be greatly appreciated. Thanks so much, Jake -
I have a 1997 Jeep TJ Wrangler 4.0 with 171K miles on the clock. This mechanic at work is making me very nervous telling me that the oil pump on the 4.0L takes a dump between 150 and 200 thou miles and I should be aware of this..Im a worrier and he's got me going now. Anybody have any input on this and what I should do? the engine runs great. When I start it cold it has 50 lbs oil pressure. when its warmed up its 40 while driving and 20 sitting at a light. Sounds normal to me but have any of you had issues with the oil pump? He says when it goes its too late..New motor time.. -
Going to swap my old 258 w/ 4.0 head for a 99 model 4.0 in my 84 CJ-8. Already have the mpfi setup, just going to use it along with the TF999 trans. Question is will the flexplate and starter both work on the 99 4.0 engine? I've been told that I need the flexplate that fits the engine and to drill it to fit the trans. torque converter. Just need to know which is correct. Thanks -
I have attached a few pictures of this transmission I have but I don't know where its from I need help identifying this transmission the only thing I can identify here is the transfer case because it has the sticker in the back its an NP "new process" 249 J This is a manual 4wd transmission I believe its an ax15 transmission but please give me your input as i'm not sure any help is appreciated one more thing from the shape of the bell housing I don't think this came of a Jeep possibly AMC or other but thanks again -
random, intermittent #1 cylinder misfire. I have replaced the coil-pac, #1 injector, spark plugs, and both upstream O2 sensors. engine leakdown and compression normal though #1 slightly lower in compression. emissions always meet I/M standards (no certificate of waiver needed). have all heat shields including #3 injector so vapor lock not issue. engine runs good when not misfiring though does have a slight roughness noticeable when at idle. Is there any way to check the current of an injector wire or plug while engine is running and showing symptoms to see if all is well in the wiring harness -
Greetings from Northern Michigan, I am in the process of building a stroker for a 2002 TJ. I need to check the pushrod length. The engine is still on the stand. Do I need to prime the lifters to get the proper pre-load? Thanks so much, Jake
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The weather has warmed, and we're not using the block heaters. (They provide approximately 140-degrees F coolant temperature at start-up.) When starting the Jeep XJ Cherokee's 4.0L engine on a relatively cold morning this week, I could hear a subtle misfire. This was during the warm-up/enrichment cycle, and by the time the engine came off the warm-up cycle (around 140-degrees F), the idle stabilized. At highway speeds, the engine seemed to run smoothly in terms of cylinder firing, though there had developed an unusual downshifting habit on grades and strong headwinds. Concerns came
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Im looking at building a motor for my 83 Cj7 I have options, I have a 96 4.0 parts motor with 0630 head plus a spare 7180 head. I have two 258s one is a 1990 (006CL25 / EF3235444) the other an 80 (009C09 / 3235444). The 1990 258 i could just re-ring and drop a 4.0 head on, i wouldn't even have to plug the water jacket holes in the head as the 90 block is squared of on that side like a 4.0 block, re cam with a RV unit and i'm hauling like never before. Pretty strait forward. Or; Take the crank and rods from the 1980 block and put them in the 4.0 block. With this one i would keep -
Ok, here is my situation. i am new to the the jeep owners world. I have wanted a cj since I was 13 yrs old and I finally got one about 2 months ago. I bought an 85 cj7, it has a 2.5 l 4 cyl with a t4 transmission. I bought it with the expectation of putting in a different motor and trans, however, what I did not count on was how much body work I would end up having to do. The body work has taken a huge chunk out of my budget for the motor. A buddy of mine gave me a 4.0 out of his 88 comanche. the engine ran but had been sitting for 7 yrs and all of the seals leaked, including the main -
I own a 1995 Jeep Wrangler YJ 4.0L just got it reassembled after repainting I'm having 1 issue it's starting hard I replaced the iac valve no change when it starts firing it only sounds like a few cylinders until it warms up i have to keep my foot on the throttle slightly it sometimes back fires but once it's warm it runs perfectly fine. I don't have a vapor canister in it cause it got lost could that be my issue? -
Happy Thanksgiving to all! I've posted before that my CJ-7 has a Cherokee 4.0L in it, but it's not really that simple Here is the history as I know it or can guess from some evidence: 1. Originally a 258/4.2L straight six with the FrankenCarb--this one was sold in California, so I'm sure it was extra-special. 2. MOPAR EFI kit added to the 4.2L. It seems this addition happened sometime after 2000, as the MOPAR labels for the kit have a 2000 copyright on them. I learned from the shop that did most of the work on this Jeep that the lady I bought it from purchased it sometime around 2001. It w
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Members and Guests...We've had some great discussion on rebuilding the popular Aisin AX15 transmission, and my 'how-to' rebuild rental at Vimeo On Demand (http://www.vimeo.com/ondemand/ax15rebuild) has received solid feedback as a resource for shops and DIY level techs! I'm pleased to see many are able to successfully rebuild and thoroughly restore the AX15, made popular in 1989-1999 model year Jeep vehicles with the 4.0L engine. The AX15 transmission rebuild coverage and our discussion here at these forums also serve other applications of the AX15, including the Dodge Dakota, some Toyota tr
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Hi, Just swapped out my AX15 transmission on my 97 Jeep Wrangler. After I completed the job, with the engine off, I was able to shift through the gears without issue. I pressed the clutch pedal and it was easy the first few times then became extremely stiff. I removed the external slave cylinder from the bell housing and manually pushed in the clutch fork with my finger. The fork moved forward easily, then I heard something fall inside the bell housing. I pulled the tranny back off and found the clutch fork retaining clip had fallen off. I proceeded to put it back in place ensuring it was s -
I have a 95 YJ 4 litre let's running extra rich. It will foul out the spark plugs with carbon fouling within a few minutes. Let me start at the beginning, I bought this Jeep running terrible. I was told it had a dead battery while jump starting they hooked up the cables backwards. I thought this was probably true due to the fact that both alternator fuses were blown. I drove it nine miles home and went through over 4 gallons of gas. Most of that ran out the tailpipe or was dumped into the crankcase. The number 5 and 6 injectors we're running fuel anytime the key was in the run position. -
I've owned a 2004 TJ Wrangler Sport for a couple of years now and it has been stalling in 2nd gear the last few weeks. I gave the car to Berwick jeep service centre and all they tell me is that their computer doesn't show them what's causing it and that there is no problem. Has anyone had this issue? i know its not my driving!!!
