https://honda-tech.com/forums/tech-misc-15/diy-how-calibrating-voltage-your-tps-sensor-2947986/

 

http://www.youtube.com/watch?v=ukPoe5E4Fqg

maybe this will help??

 

Hi guys. This is my first post. I picked up a nightmare but slowly getting the bugs worked out. I'm having a problem with idle, cold starts, & acceleration.

I have a cracked TPS. I can see about an 1/8 of an inch of the silver metal (The silver wire is normally inside of the plastic TPS housing) wire that goes to the yellow wire. The yellow is the positive from what I have read. I don't have to unclip the harness to remove it from the TPS.. If I pull on it, the TPS comes apart with the wires exposed. It doesn't seem to move while driving.

I tested it with a multimeter. The yellow wire reads 5v. The middle wire tests at .66 closed & 4.57 open. Could this be causing problems?

I plan to take off my throttle body this weekend.. replace the broken TPS.. clean out the IACV... & tighten the cold start thing.

I'm cleaning out the IACV because I noticed that sometimes (not often) the idle bounces.

I'm tightening the cold start thing because when I first start the car in the morning, it idles at 2000 rpm's & never drops. If I shut off the car after it is warm & turn it back on, it idles properly.

BTW.. I have a 99 Civic si B16A2.

 

I know this thread is old... but can someone answer this question please?

The TPS tests at .66 closed & 4.57 open. Could this be causing problems?

 

once you get the new sensor, calibrate it as described in the beginning of the thread. even if it doesn't cure your problems, you have at least ruled out another suspect.

 

had to bring this up..to calibrate on a 93 gsr.did u have to remove throttle cable or change anything?

 

The guy who owned my Si didn't take care of it. I found cracked hoses, missing bolts, timing was way out (Jumped a tooth), 3 broken motor mounts (4th one cracked)... replacing hoses & flushing the cooling system took care of most of the idle problems. Replacing the TPS took care of the idle bounce.

I'm probably doing the mounts this weekend if it stays warm.

I recently replaced the exhaust system (Ebay) everything from the exhaust manifold back. The previous owner put a universal cat on it that had the O2 sendor pointing the wrong way. All of the exhaust components were made by a company called Spec-D. The high flow cat sucks.

 

might as well add this here....what if the TB is cocked 10% or so at idle for a 1500 rpm idle on a big cam?

 

Drill out the idle bypass port if its not big enough to idle on a cam with alot of over lap.

 

Huh? There's no iacv, I'm not aware of any other "bypass" besides the iacv

 

IDLE SCREW?

 

Theres no way an idle screw will make up for that much air needed. Im running fine so far just curious cause i think i need to replace the TPS