Jerry Reader
March 28, 2013 12:09 p.m.

So pretty sure the TPS is causing the intermittent hesitation. My mechanic says they made a change mid-year production for my 1987 MR2 NA. My build-date is December 1986.

There's an early switch, easy to get and ~$75, and a later switch I need which is $300 from the dealer, and about $150-200 elsewhere. He says the connector seems to be the only difference in appearance, and might be able to make a jumper to allow me to use the earlier switch.

Anyone with old Toyota and/or MR2 knowledge know more about this? (At this point I'm willing to pay the berkeleying cash if it makes my car drive nicely for a change!)

March 28, 2013 12:21 p.m.

if you are going to get involved with Toyotas... you need to learn about

89452-12040 (08/1987 - 02/1989) 1 $157.04

89452-20070 (08/1986 - 07/1987) 1 $370.90 - can be found on FX16

89452-28010 (12/1984 - 07/1986) 1 $269.29 - can be found on AE86 GT-S

Have your dealer run all the part numbers(or better yet find an online source) and see if any of them supersede to another........

Have you tried Rock Auto?

ransom UltraDork
March 28, 2013 12:25 p.m.

Holy berkeley!!

What kind of TPS is > $100 without some sort of exotic car tax?

It's a zarking potentiometer, isn't it? Maybe with limit switches?

alfadriver PowerDork
March 28, 2013 12:27 p.m.

In reply to Jerry:

What's the part number cast into the side of your TPS?

pinchvalve UltimaDork
March 28, 2013 12:29 p.m.

Check the boards at as well, sometimes you can grab a part like that from someone parting out an AW11.

FYI, the 1985 TPS on Rock Auto is $160 and the 1988 is $60. Seems like you could do better there no matter what.

zipty842 Reader
March 28, 2013 12:38 p.m.

Toyodiy has a cross reference that lists 89452-20070 for all 3 chassis, all years, including supercharged. 89452-20050, which is also listed for 87-89 crosses to all AW11, 86-89 ST160 and 87-91 SV/VZV20 camrys. plenty of them out there in the yards

Jerry Reader
March 28, 2013 1:19 p.m.

I'll check these out soon,thanks! (I trust my mechanic 100%, SCCA member and either Club Racer or former racer, so I'll forward some part numbers to him after work when I check on his progress.)

Hitting MR2OC after work, and I know there's a vendor on eBay with a crap load of assorted parts that's helped me out in the past.

trucke Reader
March 28, 2013 2:01 p.m.

I have a TPS from an '88 GTS coupe that will not fit my FX16. The car it came from had 87K miles on it. Let me know if you want it. Will sell for shipping + cheap (low ball offer accepted). For a fellow GRMer, pay me if it works.

The FX16 TPS takes a rectangular connecter. This one is more oval. Other than that, they look the same.

GameboyRMH UltimaDork
March 28, 2013 2:09 p.m.
ransom wrote: Holy berkeley!! What kind of TPS is > $100 without some sort of exotic car tax?

A Genuine Toyota TPS. Certain parts from them are just horrifically expensive for no apparent reason.

Jerry Reader
March 28, 2013 2:31 p.m.

In reply to trucke:

Let me check w/ my mechanic. Do you have a part # by any chance?

trucke Reader
March 28, 2013 7:40 p.m.

The part number is 89452-12040. There is another number listed below that: 198500-0330. PM me if this can help.

Jerry Reader
March 29, 2013 5:07 p.m.

Thanks for the offer trucke, just picked up the MR2.
He bought a new TPS for the earlier models, and adapted it to mine. Said the wiring diagrams were nearly identical, the plug slightly different, and they made an adaptor. $114 plus labor, and hopefully we're done!

trucke Reader
March 29, 2013 7:27 p.m.

Sweet! Glad you have it going. Had the same issue with my FX16. It is annoying as can be.

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