i have a turbo gsr in an ek coupe... obd1, s300, tunerveiw, omni power throttle body, used oem TPS, water/meth in intercooler pipe... the problem is that the tps keeps getting moisture inside the cavity where the sensor goes... the first time i noticed the problem the tps was reading about 35% at idle, it would still read, but it was like the range was between 35-100, i wrote it off to the gasket being missing and washing under the hood... cleaned it out and installed another (used) tps, back to 0-100, installed a gasket this time... a little time goes by, and it begins reading anywhere from 20-35% at idle but it will still go to 100%, then it will start working properly... i noticed some moisture when i pulled the tps, i used some rubbing alcohol to dry it out and even let it sit out for the day to dry out... put it back together and it will work fine... this senario has happened a few times... now today i pulled the tps, the was no moisture, this time i was having issues with it not wanting to go to 100%, only about 88% and around 20% on the low side... it will occasionally still go to 100%, but it seems hit or miss...

 

Connection problem look for corrosion on pins? Ohm out the wires from the ecu to the tps should see next to 0 ohms. Ohms to ground should read out of range or ofl depending on your volt meter. May be time to try a new tp http://omnipowerusa.com/tps_sensors.asp

 

Draggbody, I have had this problem before and unfortunately you might not like the fix to this. It's the omni throttle body that's the problem. I know this for sure, I also went through a few of those tps before I got to the bottom of the problem. The problem with their throttle bodies is that the throttle shaft is suspended on a "sealed" bearing and the water/meth blows right through there. I tried taking off my omni throttle body to remove the shaft and try to use some sort of sealant/rubber oring. Another unfortunate is that the omni style throttle body shafts seem to be cast in there when they are made.
Well, long story short is that I don't give up easily. I actually broke the whole tb trying to remove the shaft. (I'd be actually surprised if anyone has succesfully removed the shaft without damaging the tb)

Forgot to mention that I called the people at omnipower for instuctions whilst I was trying to remove the shaft because I had taken apart a few oem ones before and I realised the shaft just wasn't moving. They tried to help but could offer no idea how to remove the shaft.

Solution: Substitute a stock OEM Honda throttle body for the omni tb. The stock oem Honda gsr/type-r throttle body shaft is easy to remove and has a built in recess on the shaft which is perfect for installing an oring on the shaft so it actually stops the water/meth from blowing out the tps side. (I actually wish I had taken pics when I did this, but it's not hard to do at all) In addition to the oring, I put the usual rtv grey silicone around the oring for some extra insurance. Since then, there has not been any moisture/water whatsoever in the tps cavity. The OEM Honda tb is designed much better, only drawback is the reduction from 70 mm opening.Hope that helped you draggbody!!

 

I was suspect that the moisture was the water meth... other than OEM, are there any other quality tb out there... how does everyone else get around this problem...

 

Good info bro, But need to ask you what about Blox Billet Throttle Bodie did you test it.

 

hussian-vtec, I have not bought a bigger tb as yet. When I did read the specs of the blox and skunk2 billet tbs, I remember reading all of them using "Sealed" bearings as a feature. Given my bad experience with the sealed bearing type tbs I am waiting on some testing data. Namely, I have a customer's car with an ericks racing billet 70 mm tb. I will be installing his water/meth soon, so I'll know if that billet design is any better than the Omni design.

Truthfully though, I was so glad that I stopped destroying tps by using an OEM tb and sealing it properly. I will call skunk2 and eric's racing to hear what they both say about the seal in their tbs. It's realy important as I doubt I will ever go back to just straight pump gas.

 

Shanebadoo thanks and keep updating after the test.
Love to know the best thing for water/meth setups.

 

1.5mm x 6mm, silicone.

check it out

http://www.d-series.org/forums/engin...th-i-hope.html

 

Thanks for the info!

 

Thank you point78 for the oring size. We were at this point months ago. The pics were helpful just so everyone would see the recess that is built-in in the stock Honda throttle body. When the rtv grey silicone is wet it acts as a lubricant for the oring as well and when it dries, it provides extra sealing. The other purpose of this thread was to find out how to seal a non oem bigger throttle bodies. If you have the time, please look into it and report back.