Recent content by Ted Young

Thanks, 5-90. What is the "NSS" - neutral safety switch? I have 1990 FSMs. Do you know where to look on the '89 to determine if its late or early production? The '90 donor vehicle is complete and running, it was my daily driver until someone ran a red light and crushed the driver's side doors...

I'm looking to convert an '89 4.0 XJ to a 5 speed using a '90 4.0 5 speed donor car (AX-15). Do I have to put the whole '90 wiring harness in the '89, or can I just swap the computer, TPS, trans, and pedals/hydraulic clutch parts, clutch, flywheel and pressure plate from the '90 over the the...

I found a short write-up on Mopar Performance's website at the link below which explains that the increased scavenging abilites of headers can possibly lean the A/F ratio out too greatly on fuel injected engines. http://www.mopar.com/muscle/tech1003.htm Is this the case with RENIX and HO...

Hi - was this mock up done with an HO or RENIX head? Aren't the alignment pins on the RENIX head in different locations then on the HO head? Thanks.

We had a problem just like this on a '94 Bronco. It was the distributor trigger (the wire harness/sensor located in the distributor with the magnetic pickup). I know these are different beasts, but just thought I'd throw it out there.

I checked on RockAuto to make sure the RENIX and HO 02 sensor part numbers were different, but they're listing the same piece for a '90 and a '91. What's going on here? Thanks, Ted

These are the relays (square ones) located below the starter relay next to the ignition coil, right? I think I saw something in the FSM about testing them. Makes sense, thanks for the input. I think the 02 sensor is shot anyways, but it won't hurt to make sure it circuitry is doing its job as...

How do I test for and/or correct a sticking EGR? It pulls vacuum to the solenoid and vacuum at the EGR vacuum motor when at part throttle. I guess what you are saying is that it could possibly be sticking a bit in the open position at idle when its not supposed to be open at all??? Thanks, Ted

Mike, Please check out my latest post dealing with these issues here: http://www.naxja.org/forum/showthread.php?t=926272 I reposted because my original title, which I could not edit, would not bring attention to the new findings I've made. EcoMike has responded twice. His comments are...

My friend who got me interested in jeeps specifically reccomended a '90 RENIX becuase they "Had all the bugs worked out on that version of the 4.0 by then". Just so happens my other requirement, a 5 speed equipped XJ for sale, bit me in the a** one day while visiting a friend's repair shop. He...

My test on the 02 sensor heating element did indicate an open circuit as per the FSM! I assumed this was irrelavent considering that the 'warm up' mode does not read off of the 02 sensor. Your instinct and my test results are too similar to be coincidence in this case. Looks like I may have a...

I looked through the ReniX files post, but my problem does not deal with a high idle condition. Recently, the idle has been choppy and unstable. I cleaned out the IAC and adjusted the TPS to output .85 volts as indicated in my '90 FSM for a manual trans car (input was 4.99 volts). Now, it...

Yes, the idle will fluctuate between 500-1000 rpm until the engine warms up. Once the engine warms up, the idle only fluctuates between 700-750 RPM. Thanks, Ted

After I installed my lift, I had similar issues. The plate that the U bolts go through on the right rear had loosened up a bit after a few thousand miles. It could also be excessive back lash between the ring and pinion.

Everything checks out according to the FSM for the MAT, MAP, TPS, CTS & CPS. Problem is at cold idle - while warming up the car idles between 500-1000 RPM. Once warm, the idle stabilizes around 700-750 RPM. I checked the above sensors, cleaned out the IAC, and adjusted the TPS so that it...