cruiser54

For $90 exchange, I'll take a 60mm throttle body on a Renix. What does Hesco get for the adapter?

Have you tested the wires at the alternator, the plug, for voltage with key on as myself and someone else have already suggested?

RENIX TPS ADJUSTMENT Before attempting to adjust your TPS be sure the throttle body has been recently cleaned. It's especially important that the edges of the throttle butterfly are free of any carbon build-up. IMPORTANT NOTE: 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. If you see more than 1 ohm of resistance some modifications to the sensor ground harness will be necessary. The harness repair must be performed before proceeding. I can provide an instruction sheet for that if needed. MANUAL TRANSMISSION: RENIX manual transmission equipped XJs have a three-wire TPS mounted on the throttle body. This manual transmission vehicle TPS provides data input to the ECU. The manual transmission TPS has three wires in the connector and they're clearly embossed with the letters A,B, and C. Wire "A" is positive. Wire "B" is ground. Key ON, measure voltage from "A" positive to "B" ground by back-probing the connectors.. Note the voltage reading--this is your REFERENCE voltage. Key ON, back-probe the connector at wires "B" and "C". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be seventeen percent of your REFERENCE voltage. For example: 4.82 volts X .17=.82 volts. Adjust the TPS until you have achieved this percentage. If you can't achieve the correct output voltage replace the TPS and start over. AUTOMATIC TRANSMISSION: RENIX automatic transmission equipped XJs have a TPS with two connectors. There is a flat three- wire connector, same as the manual transmission vehicles have, and it is tested the same as the manual transmission equipped vehicles--FOR ENGINE MANAGEMENT RELATED ISSUES. However, the automatic TPS also has a square four-wire connector clearly embossed with the letters A,B,C, and D. It only uses three wires and provides information to the Transmission Control Module. Key ON, measure voltage between "A" positive and "D" ground. Note the voltage. This is your REFERENCE voltage. Back-probe the connector at wires "B" and "D". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be eighty-three percent of your REFERENCE voltage. For example 4.8 volts X .83=3.98 volts. Adjust the TPS until you have achieved this percentage. If you can't, replace the TPS and start over. So, if you have an automatic equipped XJ your TPS has two sides--one side feeds the ECU, and the other side feeds the TCU. If you have TRANSMISSION issues check the four-wire connector side of the TPS. If you have ENGINE issues check the three-wire connector side of the TPS. For those with a MANUAL TRANSMISSION--the TPS for the manual transmission XJs is stupid expensive. You can substitute the automatic transmission TPS which is reasonably priced. Revised 11-28-2011

www.precisionautoinjectors.com. Price is for a set of 6.

If he did at all.......

In the big red wire to the alternator. It's a fuse link IIRC. Have you tested to see if you have voltage at the stud of the alternator yet? If you do, it ain't the fuse.

Got a voltmeter? Need to have battery voltage at the stud on the alternator for one thing. With key on but not started, unplug the little clip-on connector from the alternator that has 2 wires. Should be 12 volts or so at the yellow wire.

Renix has a 52mm TB on a 60mm manifold hole. Changing to a bored out body with the bigger butterfly definitely makes a difference.

I've done it both ways. The net gain with having a TB done with a new butterfly versus just opening up the body is about 4 times better.

Not at all. Get a bored TB from www.strokedjeep.com if you want a performance increase.

Actually it's open loop when it's running off preset parameters. A Renix will go into closed loop before operating temperature is reached, but only if the oxygen sensor is working. A bad CTS, IAT, or MAP sensor come into play when cold. The vacuum line from the throttle body to the MAP, if cracked, unplugged, clogged, or melted can cause a super-rich condition resulting in a no-start.

Without enlarging the whole TB size and increasing the size of the butterfly, you won't gain anything. See www.strokedjeep.com

The fuel pump ballast resistor's sole purpose is to give 12 volts to the fuel pump on starting and then lower the voltage to the fuel pump after the engine is running so it's quieter. That resistor can be bypassed with no ill effects except that the pump might be too noisy for some folks. OP, do you have a voltmeter? I would check the TPS adjustment. It's a real possibility that it has failed. Have you ever cleaned your throttle body and IAC?

Match the intake and exhaust ports to the gasket on both the head side and the manifold sides. 60mm throttle body from www.strokedjeep.com.

There was a recall on those ratchet assemblies. Check with your dealer.

Check to see that your intake manifold bolts are snug.

New gasket installed under the TB after it was removed?

OP, you have the classic symptoms of a failed/failing TPS. I'm including the adjustment/test procedure for the TPS along with the something else that needs to be addressed on all 1987s and 1988s. You also have a connector in your harness which carries a bunch of signals between the sensors and the ECU. Resistance in that connector can give the ECU false info. The connector needs to be cleaned out. Renix Jeep C101 Connector Refreshing The C101 connector on 1987 and 1988 Renix Jeeps was a source of electrical resistance when the vehicles were new. So much so that the factory eliminated this connector in the 1989 and 1990 models. The factory recommended cleaning this connector to insure the proper voltage and ground signals between the ECU and the fuel injection sensors. We can only imagine how this connector has become a larger source of voltage loss and increased resistance over a period of almost 25 years. The C101 connector needs to be cleaned at least once in the lifetime of your vehicle. Chances are it’s never been done before. Almost every critical signal between the engine sensors, injectors, and the ECU travel the path through the C101. The C101 is located on the driver’s side firewall above and behind the brake booster. It is held together with a single bolt in it’s center. To get the connectors apart, simply remove the bolt and pull the halves apart. You will find the connector is packed with a black tar like substance which has hardened over time. Take a pocket screwdriver or the like and scrape out all the tar crap you can. Follow up by spraying out both connector halves with brake cleaner and then swabbing out the remainder of the tar. Repeat this procedure until the tar is totally removed. This may require 3 or more repetitions. Wipe out the connectors after spraying with a soft cloth. If you have a small pick or dental tool tweak the female connectors on the one side so they grab the pins on the opposite side a bit tighter. Apply a true dielectric grease, not the stuff that came with your brake pads, to the connection and bolt it back together. RENIX TPS ADJUSTMENT Before attempting to adjust your TPS be sure the throttle body has been recently cleaned. It's especially important that the edges of the throttle butterfly are free of any carbon build-up. IMPORTANT NOTE: 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. If you see more than 1 ohm of resistance some modifications to the sensor ground harness will be necessary. The harness repair must be performed before proceeding. I can provide an instruction sheet for that if needed. MANUAL TRANSMISSION: RENIX manual transmission equipped XJs have a three-wire TPS mounted on the throttle body. This manual transmission vehicle TPS provides data input to the ECU. The manual transmission TPS has three wires in the connector and they're clearly embossed with the letters A,B, and C. Wire "A" is positive. Wire "B" is ground. Key ON, measure voltage from "A" positive to "B" ground by back-probing the connectors.. Note the voltage reading--this is your REFERENCE voltage. Key ON, back-probe the connector at wires "B" and "C". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be seventeen percent of your REFERENCE voltage. For example: 4.82 volts X .17=.82 volts. Adjust the TPS until you have achieved this percentage. If you can't achieve the correct output voltage replace the TPS and start over. AUTOMATIC TRANSMISSION: RENIX automatic transmission equipped XJs have a TPS with two connectors. There is a flat three- wire connector, same as the manual transmission vehicles have, and it is tested the same as the manual transmission equipped vehicles--FOR ENGINE MANAGEMENT RELATED ISSUES. However, the automatic TPS also has a square four-wire connector clearly embossed with the letters A,B,C, and D. It only uses three wires and provides information to the Transmission Control Module. Key ON, measure voltage between "A" positive and "D" ground. Note the voltage. This is your REFERENCE voltage. Back-probe the connector at wires "B" and "D". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be eighty-three percent of your REFERENCE voltage. For example 4.8 volts X .83=3.98 volts. Adjust the TPS until you have achieved this percentage. If you can't, replace the TPS and start over. So, if you have an automatic equipped XJ your TPS has two sides--one side feeds the ECU, and the other side feeds the TCU. If you have TRANSMISSION issues check the four-wire connector side of the TPS. If you have ENGINE issues check the three-wire connector side of the TPS. For those with a MANUAL TRANSMISSION--the TPS for the manual transmission XJs is stupid expensive. You can substitute the automatic transmission TPS which is reasonably priced. Revised 11-28-2011 Revised 11-29-2011

Are you hell-bent on using the HO harness and fuel injection? I've put HO engines into Renix vehicles using the Renix stuff a coupla times. Easy.

If it's a Renix, good possibility the TPS is bad then.

Year and engine?

www.kelleyswip.com

Let me help you here. You get to drive donor, big plus to check parts. Swap axle, trans, TC, linkage. Rape for known good parts, alt, starter, battery, etc.......... Sell stack light grill only available to the Wagoneer........maybe $100-$150 Scrap body.......and your front axle and 2wd trans........weight........maybe $300 Sell good rear axle........check is Tracloc........maybe $100 By the time you get done your swap cost you maybe $200 or less. My logic exactly.

Ignition timing on a Renix is done by the ECU. Have you ever done a fuel pressure test?

Rich idle is affected the most by the folowing parts, in order of effect, biggest to smallest: MAP, CTS, IAT, O2 Sensor