Search Results for ‘4.0’

Hey guys I need some YJ help.. my rear adams driveshaft popped out as after 7 months of driving I noticed it was 2 inches too short, any how .. I would normally disconnect the whole rear adams drive shaft so can put it in front wheel drive till I get my new rear drive shaft back. issue is I’m...

Hey everyone! I'm new to the forum. I've been having this issue with my jeep for several months now. In the first few minutes of a cold start, i will put my jeep in drive, and if i sit there with my foot on the brake, the Rpms will be at normal idle, then quickly fall, the engine will rev up a...

I am having issues with turning my 93 YJ off. Sometimes it will turn off, and other times it won’t. I think the car is still reading it as my key is still in the ignition. I can turn on my headlights and my brake light is on still, even after removing the key. The only way that I got it to shut...

I have had an issue with my AX-15 transmission on my 4.0L. It can be hard to get into first and second and reverse. It also makes rattling as I engage first and vibrates as I drive down the road or let off the gas completely. I believe that it is the clutch and the throwout bearing. I was...

Hi all! Having a P0306 and P0302 error that just started showing up. Had already replaced both O2 sensors (OEM), so pulled the plugs (which were in awful shape (.04-.07 gaps, shame on me for trusting the guy I bought her from, he said he'd just changed them, but that's another story). I was...

Old water pump was going so I replaced the radiator, water pump, and thermostat but it still overheated. The upper radiator hose was hot and there were no leaks. Also, the air in the cabin wasn't hot or cold and AC lines were warm. Thanks.

Ok. I have a knock low in my 2001 4.0... I'm pretty sure it's piston slap (roughly 1 RPM) I already pulled the transmission and transfer case to replace the clutch, so in for a penny, in for a pound. The plan is to pull the engine and do the mechanical work myself, and find a machine shop for...

2001 Wrangler Sahara 4.0, 5-speed. Ok. So I was on a highway drive. It was very hilly, so I was back and forth between 4th and 5th, doing a fairly steady 70mph give or take. Right before my destination, my Jeep starts knocking. Sounds like the lifter tick, but lower in the engine and lower in...

I got a 1999 jeep wrangler TJ with the 4.0 idles fine I'm getting a random sputter almost as if I rapidly turned the key off and back on. While holding a steady 30 MPH on a dirt road I stared at the RPM Gauge until it did it and when it stumbles the RPMs jump to 3000 RPM even tho the motor...

Hey guys, for the past couple of days I‘ve been noticing a strong burning smell, almost like running rich, when engine braking down a pretty steep hill. The engine sits at 1700-1800 rpm in 3rd going down the hill and only notice the Smell near the bottom but goes away while I’m going up the...

Hi All: I appreciate your advice and yes i know I spent to much money already ... I am looking for some advice on replacing or upgrading the engine on my 1997 Jeep TJ SE. Normally, I would consider selling but I am in to this pretty deep; this was a father-son project and we put a lot of nice...

I am in the process of swapping a 1993 cherokee 4.0 motor into a 1990 yj which previously had the 4.2 liter. It is a pretty rough jeep and only going to be used on trails and around the property so I am fine leaving it pretty rough around the edges as far as wiring and look. What I know Right...

I am going to swap my 4.2 over to a 4.0 cylinder head, manifold, and MPI and I pulled the parts from a 1995 Grand Cherokee. I am fine with the mechanical side of this since it really isn't any more complicated than putting a new head on, but I am having trouble finding a good wiring diagram. I...

Recently, my tj body was separated from the frame and motor. TJ had a ton of rust and the frame needed lots of work. After the repairs, jeep was put back together in a rush and I'm finding that the lines that go to the intake and probably EVAP may have been hooked up incorrectly. Now I'm not...

Hi all, I was curious as to what it takes to get an Eaton m62 or m90 to work on a 4.0 i6. I have heard there are differences 05-06 but I would like to focus on 04-prior. Anyone have a build sheet or a list of what they did DIY or have a cheaper kit that I can't find? I was looking at getting...

High mileage jeepers, what was the first thing to mechanically fail in your engine (electronic sensors aside)? My 98 has about 225k give or take on the odometer, no major issues or slack in performance yet. What is your experience?

Don't you just hate it when some newbie joins the forum to ask questions before contributing anything?:) Well I'm about to look at a few TJ's 2000 - 2006, specifically the Sahara 4.0 auto model under 75000 miles. It's a retirement present to myself. Living England there are only a few...

I noticed the engine sounded different and the CEL came on (P0140). A few months ago I had to replace the exhaust manifold for bank 2, due to a crack, and this sounded similar to last time. So I checked the manifold yesterday, and found a crack around the back end of the bank 2 manifold. From my...