cruiser54

The clicking in the throttle body is the injector. Normal. Make sure your intake manifold bolts haven't loosened up and check the hoses to it below the throttle body for vacuum leaks.

Yes. Do Tips 1 through 5 FIRST. No shortcuts.

Not true. I've done it. Huge difference. 40% brighter with JUST the harness. A guy on one of the other forums measured the difference in Lumens and got the 40% figure. I had done the harness alone in my wife's 88 before reading the results of his test, and I guessed 35% better. aLWAYS do just the harness first. You will be pleasantly surprised.

Okay, time for myth busting. Renix goes into Closed Loop very quickly, based on O2 sensor temp. NOT coolant temp. The ONLY stat I will use anymore is the one from the dealer. 52028186. I' went through 5 Stant 195s before going factory. At 25* F I drive 2 miles and I'm at 195*. I hate being cold in the cab. While the stants never let me get too hot in the summer, they took forever to get to operating temp in the cold.

746s.

Possibly a bad injector. Pull all the plugs and see what they look like. Even with a leaky injector, you should see higher fuel pressure though. Stock injectors? If so, get some 0 280 155 746 Volvo injectors. Programbo on Cherokee Forum sells them.

I can't remember. And congrats on the job!!

Maybe it got worse up front because the cat is clogged?

Never heard that. Concerned about a clogged cat? See Tip 16.

746s all the way. Best I've ever used. Only b*@$£ is the Volvo 850s are 5 cylinder motors...............

These guys^^ give great advice.

One thing at a time. You're doing a great job of doing things logically.

I wonder if your fuel pressure regulator has a hole in the diaphragm.

You done good. Yep. Thanks for the earlier post. It helped me to clarify Tip 5.

I just revised Tip 5 to be more clear: Cruiser’s Renix Sensor Ground Test This sensor ground circuit affects the CTS, TPS, IAT, MAP, ECU and diagnostic connector grounds. It’s very important and not something to overlook in diagnosing your Renix Jeep as it is common for the harnesses to have poor crimps causing poor grounds. If any or all of the sensors do not have a good ground, the signal the ECU receives from these sensors is inaccurate. Set your meter to measure Ohms. Be sure the key is in the OFF position. Using the positive (red) lead of your ohmmeter, probe the B terminal of the flat 3 wire connector of the TPS . The letters are embossed on the connector itself. Touch the black lead of your meter to the negative battery post. Wiggle the wiring harness where it runs parallel to the valve cover and also near the MAP sensor mounted on the firewall. If you have an 87 or 88 with the C101 connector mounted on the firewall above the brake booster, wiggle it, too. You want to see as close to 0 ohms of resistance as possible. And when wiggling the harnesses/connectors the resistance value should stay low. If there is a variance in the values when wiggling the wires, you have a poor crimp/connection in the wiring harness or a poor ground at the engine dipstick tube stud. Refreshing of the dipstick tube connection is covered in Tip #1, and the sensor ground upgrade is covered in Tip #6. On 87 and 88 models, you could have a poor connection at the C101 connector as well. See Tip #2 and Tip # 27. Revised 11/01/2014

That's Tip 6.........

Weak or leaking, correct. Pull the vacuum hose of the fuel pressure regulator and see if it smells like gasoline.

Gotta be running.

Doubtful it's the ECU. But Tip 9 covers refreshing the connections. Might be worth a try.

CTS can be tested. Click on my tech photos and scroll through for the CTS and IAT values.

That's what my strippo 86 had. 3.55 2wd.

It does. And it's prone to breakage at the sensor.....

I love that analogy..... How about this? Start with a cage containing five monkeys. Inside the cage, hang a banana on a string and place a set of stairs under it. Before long, a monkey will go to the stairs and start to climb towards the banana. As soon as he touches the stairs, spray all of the other monkeys with cold water. After a while, another monkey makes an attempt with the same result - all the other monkeys are sprayed with cold water. Pretty soon, when another monkey tries to climb the stairs, the other monkeys will try to prevent it. Now, put away the cold water. Remove one monkey from the cage and replace it with a new one. The new monkey sees the banana and wants to climb the stairs. To his surprise and horror, all of the other monkeys attack him. After another attempt and attack, he knows that if he tries to climb the stairs, he will be assaulted. Next, remove another of the original five monkeys and replace it with a new one. The newcomer goes to the stairs and is attacked. The previous newcomer takes part in the punishment with enthusiasm! Likewise, replace a third original monkey with a new one, then a fourth, then the fifth. Every time the newest monkey takes to the stairs, he is attacked. Most of the monkeys that are beating him have no idea why they were not permitted to climb the stairs or why they are participating in the beating of the newest monkey. After replacing all the original monkeys, none of the remaining monkeys have ever been sprayed with cold water. Nevertheless, no monkey ever again approaches the stairs to try for the banana. Why not? Because as far as they know that's the way it's always been done round here. That's Congress.

Funny you should ask that!! On my neighbor's 87 XJ, we were reading the factory scan tool and the O2 sensor switched slowly. He was gonna go get one but I said "Let's wait and do the C101 elimination first." After we eliminated the C101, the O2 switched very quickly like it should....

Good plan.