My throttle position sensor is worn out on my 20b.
Just wanted to know if anyone has swaped a 20b TPS for a FD RX7 TPS? Or if they are the same?

 

No they are not the same.

 

but you can take the one from a 13b-re TB.

 

ok thanks

 

The 1990 Toyota Supra used the same TPS

 

Cool, thanks for that..

 

Hmm, I could swear we swapped my 20b one out for a 13b unit with no problems.

 

Cosmo (20b or 13b) are different to to the other rotary TPS. Cosmo ones are round and 13brew are a rectangle shape.

 

The connectors are not even remotely the same. From your pics in your threads you do not have a 20B throttle body, looks like you are using the FD. This would explain why you did not have any problems swapping TPS.

The FD connector is a tap lock , the Cosmo connector is a rectangle and has a wire spring lock. It is also located on the front of the TB, FD is on the rear.





FD

 

^Doh, you are correct sir. I am running a 13B TB. All those bad prior conversion experiences are now flooding my brain. I recall finding a massive hunk of sealant used to mate the 13B TB to the 20B UIM. It had solidified and cracked and pieces were chunking off of it into the UIM

Beautiful engine in that pic BTW.

 

OLD THREAD REVIVAL!!


Are the SENSORS themselves interchangable onto the physical throttle bodies of each motor? I realize the connectors are entirely different.

I'm trying to fit a 20b TPS on an FD TB.

 

Why?

 

The 20b TB is extremely oxidized and the bolts/screws are frozen in place. I cannot remove them to polish the TB. Rather use a clean 13brew TB if its swappable.

Also, I have a Greddy elbow that I'd rather not hack the flange up to fit.

Why not?

 

FD and Cosmo TPS spin in opposite directions, as was already stated in this thread they are not interchangeable. They have the same footprint but will not register any voltage change when installed on the incorrect TB.

If you are using the FD TB just use a FD TPS. However using the FD TB has it's own fitment issues.

 

understood, thanks!

 

Back from the dead!!!!

I just picked up an 85 Gsl-se with a Cosmo-re swap. It has trouble idling and generally runs like **** (bucking and hesitating). While looking at the car I noticed the TPS had epoxy oozing out of it like the PO had opened it up. After reading Banzai's comments and suggestion about the Supra TPS, I was wondering if anyone has used the Toyota TPS? I picked one up used at my junkyard the other day. Car has power FC with Banzai's adaptor harness (nice bit of kit, btw) and is running rich as hell too.

 

If you bought one, then put it on. Go to the sensor switch screen and look at the vta1 & vta2

TPS can come from:

TOYOTA 4RUNNER (1986 - 1989)
TOYOTA CAMRY (1987 - 1991)
TOYOTA CELICA (1986 - 1989)
TOYOTA LAND CRUISER (1988 - 1989)
TOYOTA MR2 (1988 - 1989)
TOYOTA PICKUP (1986 - 1989)
TOYOTA SUPRA (1986 - 1992)

BECK/ARNLEY 1580531
AIRTEX / WELLS 5S5340
STANDARD MOTOR PRODUCTS TH218

 

Hmm, it looks like I may have picked up the wrong TPS. I went on info from a genuine Toyota parts site. I found the number for the Supra and it crossed to these vehicles. I pulled my TPS from a 1991 Landcruiser with a straight six. I guess I can just try it and see if it works. Thanks for the reply!

TOYOTA pn#89452-14050

4Runner 4 Cyl 2.4L, 6 Cyl 3.0L
22RE, 3VZE; RN101, RN106, RN110, RN120, RN121, RN130, RN131, RN80, RN85, RN90, VZN100, VZN105, VZN110, VZN120, VZN130, VZN131, VZN85, VZN90, VZN95

Camry 1989-1990DX, LE 4 Cyl 2.5L 2VZFE; VZV21

Cressida 1989-1992 GLX 6 Cyl 3.0L 7MGE; MX83

Land Cruiser 1989-1993 6 Cyl 4.0L 3FE; FJ62, FJ80

Pickup 1989-1991 DLX, SR5, STD 4 Cyl 2.4L, 6 Cyl 3.0L
22RE, 3VZE; RN101, RN106, RN110, RN120, RN121, RN130, RN131, RN80, RN85, RN90, VZN100, VZN105, VZN110, VZN120, VZN130, VZN131, VZN85, VZN90, VZN95

Supra 1986-1992 6 Cyl 3.0L

 

According the rockauto, that number checks out. Just look at the connector

 

When I was trying to pin down my tuning issues over the summer, I did some digging and found that some of the AW11 MR2 owners have issues with their TPS developing dead spots. Since it's on a 4A-GE, the same sensor cross references to the AE86 as well. I believe it was through Club4AG where I found a short guide on how to open it up and clean it. Did it on my 20B TPS, it made a decent difference by stabilizing some of the fluctuating values I was seeing before, not enough to sew up the issues though (low compression). If it were a rare unbotanium part, I'd say clean it with alcohol and reassemble. But since it's not, a new one is cheap insurance.

 

I appear to have a dead spot on my 20B TPS, anything < 5% movement doesn't pickup, so I ordered the BECK/ARNLEY 1580531 which the lever is 180* out (see pic). So thinking it was incorrect, I ordered the Standard Motor Products TH218, which again is 180* difference. So now do I open my semi-working tps and see if I can swap the levers or attempt to find the real part number for the 20B?




Another option is attempt to clean the thing: How to disassemble and clean a TPS throttle position sensor - MR2 Owners Club Message Board

Anyone come across this yet?

 

instead of taking the TPS apart..I got an idea.
Get an old throttle "tab" off another junk throttle body and score the tab at 90 degrees to accept the 1/4 turn you need to align the tabs on the Throttle body shaft to the TPS.
You put the tab back onto the Throttle body shaft in it's newly clocked position and can place the TPS back on at it's normal stock position.

 

I actually have a spare 20B throttle body which the tab is the same. I guess I can see about modifying that for the correct orientation. Thanks sir.

 

Which one is the new one? If it is the one on the right, then the orientation is correct, the one on the left is wrong/out of spec. Take a look at the picture I posted above.

 

Left one is new. My old stock one is right. Oddly the picture on Amazon shows the new one oriented just like my stock one.