blackwulfkiba

Was traveling down I-40 heading to take a friend to a doc appointment I notices small blips of hesitation while I was doing about 70-75 mph yet once I backed off the gas to about 65 mph it stopped hesitating immediately.

Also noticed no matter what it seems my oil pressure is always at 10 PSI is there a way to check the oil pressure with a gauge?

askingxforxit

When is that last time you did a tune up?(spark plugs, wires, filters, etc)

You can get an external oil pressure gauge from any auto parts store. I'm not sure if they rent those out and they're probably around $40 to buy one

blackwulfkiba

just changed them all tonight after work and the idle smoothed out but it still does the momentary pause now and then and its like for a split second

highmileage

Had a similar issue with a 93 chevy turned out to be the MAP sensor going bad. How's your fuel pressure?

blackwulfkiba

Unknown. I know the pump is a lil noisy and it takes a moment or two to start her up.. gonna rent a pressure tester from work tomorrow and let ya know

highmileage

Pressure should be @31lbs with the regulator hooked up. Have you preformed any of Cruisers tips?

blackwulfkiba

Trans plug refresh,C101 connector and working on the ground refreshing tomorrow

freegdr

Also noticed no matter what it seems my oil pressure is always at 10 PSI is there a way to check the oil pressure with a gauge.....Pull wire off sensor by oil filter ground connector to metal. Turn key to run position see if gauge goes all the way to right if so buy new sensor.

Fred/N0AZZ

New feature built into the newest Radar Guns to get you to slow down

XJRed96

could be something going on with the TPS sensor as well however that would require an oscilloscope to verify.

cruiser54

Not really:




RENIX TPS ADJUSTMENT

Before attempting to adjust your TPS, there are two things that need to be done.

1) 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.

2) With the Key OFF, and using the positive (red) lead of your ohmmeter, set on the lowest scale, 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 parallels the valve cover and also over near the MAP sensor on the firewall. If you see more than 1 ohm of resistance, or fluctuation in your ohms reading, 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.

TPS ADJUSTMENT FOR ENGINE ISSUES

Both RENIX manual and automatic transmission equipped XJs and MJs have a flat three-wire connector to the TPS which provides data input to the ECU. The three wires in the connector are clearly embossed with the letters A, B, and C. Wire "A" is positive. Wire "B" is ground. DO NOT UNPLUG THE CONNECTORS !! 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. Loosen both T-20 Torx screws attaching the TPS to the throttle body and rotate the TPS until you
have achieved your desired output voltage. Tighten the screws carefully while watching to see that your output voltage remains where it is supposed to be. If you can't achieve the correct output voltage, replace the TPS and start over.

Sometimes, after adjusting your TPS the way outlined above, you may experience a high idle upon starting. If that happens, shut the engine off and reconnect your probes to B and C. Start the engine and while watching your meter, turn the TPS clockwise until the idle drops to normal and then rotate it back counterclockwise to your desired output voltage.

TPS ADJUSTMENT FOR AUTOMATIC TRANSMISSION ISSUES

RENIX automatic transmission equipped XJs and MJs 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 outlined above—FOR ALL 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. THIS SQUARE FOUR WIRE CONNECTOR IS USED FOR TRANSMISSION/SHIFTING RELATED ISSUES ONLY. First off, DO NOT UNPLUG THE CONNECTORS !! Key ON, measure voltage between "A" positive and "D" ground by back-probing the connector. 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.

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. The square 4 wire connector is just not used.
Revised 12-15-2013

cruiser54

Be sure to do #3 and #5 while you're at it.

Don't buy any parts, or test any sensors until this is done!!

freegdr

The Renix God has spoken listen with undivided attention.

cruiser54

LOL.

Good morning, General.

freegdr

Morning Major.