vacuum leak

So my TJ threw bank 1 and 2 lean code recently, so plugged the OBD reader in and checked the LTFT and O2 sensor data. LTFT at idle is about 20% at Running Temp in Closed Loop, on throttle open (in Neutral), the LTFT drops for a split second then goes back up to 20% and remains there till WOT...

Hi All, I've noticed my '99 3spd has been using more fuel (12mpg) lately (16mpg is normal) but I put it down to only doing very short runs. Took it out yesterday for a 300km round trip to the farm and noticed a couple of things: 1) Mileage was still poor - 14mpg 2) The aircon would switch...

I’ve recently had some issues with my 2004 Jeep wrangler rubicon that I was looking for some help with. Since I purchased the vehicle, I’ve had a very loud whistling sound that I assumed to be a vacuum leak. I replaced the throttle body as that’s where a majority of the smoke came out of when...

I initially posted this thread in association with what I assumed was vacuum leak. Was actually just a slightly stuck cable on the TB. I recently finished a JK Axle swap and am having very intermittent issues with my brake pedal going soft and to the floor. Can pump the brakes back up and...

I did a boost leak test using soapy water and found both ends of the TB shaft leaking. No other leaks at the TB. Is there a seal and/or bearing for each end of the shaft that I can order? Or is there a TB rebuilder that anyone would recommend I contact? I appreciate the help on this.

Alright Jeep Family - I've got a head-scratcher going on over here. Not sure if it is a possible vacuum leak or something else. Could use your collective input. Possible Information Needed: 2003 TJ Sport, 4.0L, Automatic, 121k mi Banks Cold Air Intake Throttle body spacer Standard OEM Throttle...

Bought a 2000 4.0 and just got engine light and vacuum noise. I see LDP has open port and there is an un-used electrical connection next to it. Can someone tell me where the open port needs to connect as well as the connector?

I have a 2004 TJ, 4.0 sport 5 speed manual. 30 inch tires, no lift. Just replaced TPS and IAC after check engine like error code p1294 I think. (wasted money. Did nothing :BangHead:) cleaned out throttle body, still get a rough idle. Doesn't stall or anything. There was a lift in it that was...

Hi all. Here's the story: I've only had my 2004 TJ for about a week or so. I purchased it used from a dealer, and overall it runs well. Drove it this morning, all was good. Several days ago, she did something weird: She whistled. Not a small whistle, oh no, but a large all out steam kettle...

2004 Rubicon with 4.0. Have owned it about two weeks. Started throwing this code after I put 700 miles on it. Replaced after market gas cap with Mopar locking OEM gas cap. Had Oreilys reset the code and threw it again after 100 miles. Have read on the internet that topping the tank off after the...