IAT or MAT renix

is the renix era IAT / MAT sensor available new anywhere? i cannot seem to get an ohms reading on mine or the one i took from the junk yard.

Note from DJ
My first thoughts what makes you think your MAP is bad they don’t have a very high failure rate and two for two is not normal.
Also where are you trying to get ohms reading across?

Now hear is a link for testing a MAP but you are checking for DC voltage.
Keep us posted as to your progress.

Manifold Air Pressure or MAP testing
http://www.naxja.org/forum/showthread.php?t=1062262

What does it do? It compares ambient barometric pressure during start-up (cranking) to engine load while engine is running. The ECU computes that information and adjusts the air-fuel mixture accordingly.
See Post #2 by mongolchuck:
Information from alldata:

actually i was asking about the "MAT" (manifold air temp sensor), or also known as the "IAT" (intake air temp sensor). My "MAP" tested good. (5v cold, 1.8 warm idle).
But truth be told i did have a brief old timers episode when testing ohm on the MAT/IAT and was testing on the wrong setting. atleast now both my MAT sensors are clean and test good. after a long hunt (a few days worth) for why i have a low idle and seemingly rich condition, i may have found the issue. many times i have tested and re-set the TPS after doing other changes, but this time while the engine was running (still low idle and engine at temp) i unplugged the TPS and it had no effect. but when i went to replug it i noticed it would raise the idle as i squigled (it's a word) around. i kept messing with the connection and got it to stay at a normal idle. went for a test run and it ran great. more power, much smoother. i have unplugged that connector many times before, bet never really messed with it while it was running. looks like i will be making a better connector, or atleast tweeking the terminals a bit on this one to gain a better contact. so far so good.

Use these instructions to set your TPS, and do it on the "engine" side since you are experiencing driveability issues.

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: Set your meter to measure Ohms. 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.
If you see more than 1 ohm of resistance, and/or fluctuating 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 03-13-2012

Note from DJ
Nice revision on Renix TPS adjustment cruiser, I have it saved along with your other write-ups, thank you.

Sorry OP 2stix I got the M’s confused, old timers disease is setting in I guess.

djgrayxj said:

Note from DJ
Nice revision on Renix TPS adjustment cruiser, I have it saved along with your other write-ups, thank you.

Sorry OP 2stix I got the M’s confused, old timers disease is setting in I guess.

Click to expand...

Thanks DJ. I've been working on the write-ups this winter. I'd be glad to post up a list for you to check out. Let me know.

I usually get parts from napa or carquest. I would start there..