[talonxracer]

I know that every aftermarket TB I have tried has damaged the TB unless an extremelly thick TPS gasket(at least the thickness of 2 or 3 gaskets) are used.


And seeing that you have the TPS apart, why not simply solder on some more significant gauge wire to connect the board to the output pins?

 

[WESTUP]

I thought of doing that,but wire is not best,the first post bottom right picture is how Honda had it and that's most durable as far as the contacts go.

I am going to try and make a modified sensor using the OEM curved metal prongs and a modified board.The most difficut part is assembling the sensor housing again and hope the rotating wheel makes correct contact with the board.

 

[talonxracer]

You are right, wire would be hard to use, I am sure you could fabricate some spring metal strips that would work.

It may take some trial and error as far as getting the correct pressure on the contacts, too little and it would suffer from intermittant contact and too much pressure and the trace on the board may wear out to quick.

How about making an adaptor plate to use a Ford TPS?

 

[WESTUP]

After I examined the housings further,I see that the board rests on a lip inside the housing so,to me,there really is no wrong way to assemble the gap for the board to wheel.I also noticed the wheels' contacts are flexible and adjust to slight differences in gap,but need to be a certain distance for the proper tension.Just have to epoxy or JB weld the 2 pcs of the housing together again and try it.
If it works I will start a side job beefing up tp sensors,lol.

 

[Timmy.Ho]

After I examined the housings further,I see that the board rests on a lip inside the housing so,to me,there really is no wrong way to assemble the gap for the board to wheel.I also noticed the wheels' contacts are flexible and adjust to slight differences in gap,but need to be a certain distance for the proper tension.Just have to epoxy or JB weld the 2 pcs of the housing together again and try it.
If it works I will start a side job beefing up tp sensors,lol.

well , do let me know the progress

i've got like ..... 3 or 4 defective original keihin's just begging to be experimented upon

 

[WESTUP]

OK,Well what are you waiting for,open one up and show us the innards!!
I want to see if we have a pattern with design and failure.

If you need to know how,Just Dremel the glue looking area slightly all around and it will expose an edge of the 2 pcs of the case,then pry lighty with an xacto or small screwdriver and voila.

 

[allmotorek4]

dont Honda of Japan sell the tps by itself? i know they did with b series. not sure with k series.

 

[talonxracer]

dont Honda of Japan sell the tps by itself? i know they did with b series. not sure with k series.

Nope, neither Honda nor Keihin sell the TPS separately to the public.

 

[allmotorek4]

Nope, neither Honda nor Keihin sell the TPS separately to the public.

isn't that shitty.

 

[WESTUP]

I would like to know why the reason is Honda does not sell the T body and TP sensors seperately,and why are they costing so much? The TPS are set at factory with break away bolts for a reason and I wonder why that is.

 

[Timmy.Ho]

OK,Well what are you waiting for,open one up and show us the innards!!
I want to see if we have a pattern with design and failure.

If you need to know how,Just Dremel the glue looking area slightly all around and it will expose an edge of the 2 pcs of the case,then pry lighty with an xacto or small screwdriver and voila.

Bro, I was studying the TP sensor (honda/keihin) as what you've suggested, and it seems to be pretty much in 1 piece , particularly near the socket, i didn't manage to pry it open.

any suggestions on the matter?

 

[WESTUP]

Bro, I was studying the TP sensor (honda/keihin) as what you've suggested, and it seems to be pretty much in 1 piece , particularly near the socket, i didn't manage to pry it open.

any suggestions on the matter?

Look at the pics up top again,its like a door.The body part that has the logo on it,around that edge there is a bead,it looks like its part of the plastic,but it is a glue and you can dremel it and reveal the mating surfaces of the two pieces.If the logo were facing up,dremel the edge at 45*,not the socket though that stays on the lower piece. Focus on grinding and prying on the round end of the tps,the socket is where the connectors are that we need to see.Just grind and open it up,if it breaks it breaks,not like you will use it again.We just need to compare the inside connectors and see if they are consistent.Not alot of people seem to be interested in solving this common problem, so if you can donate some data that would help.

 

[Andrie]

Just to throw it out there. I'v been running K series in my race car since 2005. I have zero TPS failure. Been running the same TB and TPS since 2007.

 

[WESTUP]

Thanks Andrie.

This is an oem keihin as well,like the pic on the right in my first post.I have this type sensor in my car now and we will see in a few weeks at the first race what happens.

 

[WESTUP]

Any more out there with TPS failures? I would like to see more opened up to compare to mine.

 

[Mr_Plenty]

i was wondering how the insides of the hyprid tps looked? Are they more similar to the OEM keihin or the BLOX,OMNI,BWR...

 

[WESTUP]

I wonder as well.I have not had my hands on one of them yet.

 

[Timmy.Ho]

Look at the pics up top again,its like a door.The body part that has the logo on it,around that edge there is a bead,it looks like its part of the plastic,but it is a glue and you can dremel it and reveal the mating surfaces of the two pieces.If the logo were facing up,dremel the edge at 45*,not the socket though that stays on the lower piece. Focus on grinding and prying on the round end of the tps,the socket is where the connectors are that we need to see.Just grind and open it up,if it breaks it breaks,not like you will use it again.We just need to compare the inside connectors and see if they are consistent.Not alot of people seem to be interested in solving this common problem, so if you can donate some data that would help.

Bro!

Ok, i have managed to dissect a faulty Keihin/Honda OEM TP sensor ..... and will be uploading the pictures soon.

basically, either by contact/impact or extremely harsh vibrations, the ceramic board within the TPS shattered ....

I believe in some other cases without the CEL , the ceramic circuit board merely cracked, and causes intermittent contact.

will be uploading the pictures soon.

 

[WESTUP]

Thank you so much for posting again.This is great that you have confirmed my diagnosis of the oem ceramic board and this supports my oem and aftermarket sensor evidence.

I hope some of the manufactures can see that this is an important issue to us and those who want to eliminate the money pit of cheap aftermaket sensors.Do the math at $50-100 each,these guys are making a killing of these cheesy tps sensors that cost about $10 to make.

Maybe Honda Americas will begin to sell the sensor seperate someday and overpower the aftermaket sensor option,which is wise if I were them.

 

[Timmy.Ho]

Ok , as promised, here are some pictures of the ceramic circuit board from the Honda OEM Throttle Position Sensor (manufactured by keihin)

this particular one chipped and shattered probably due to impact, but from studying the pictures and seeing how thin it is ..... I suspect it wont take much for the board to snap in half.

before dissecting the TPsensor, the OUTER shell (housing) was in perfect condition, no cracks on the housing, etc, proving while the exterior is pretty tough, the circuit board inside is somewhat brittle.

the circuitry looks simple enough , i think some engineering students may be able to etche it out , should we really want to repair a tp-sensor.