glundblad Posted February 7, 2009 Share Posted February 7, 2009 I purchased a new TPS. BLHTAS was kind enough to present an article on how to adjust the TPS. I believe I am missing something and could use some advice. Before I connected the sensor, I checked voltage at terminals B & A and it read 4.99 volts. I assume the variance is due to my inability to get the probes inside the connector properly. When the connector is mounted and adjusted to .8 volts on terminals C & B, the engine races. I have better luck if I adjust it by hand. Unfortunately, when I do, the idle is way off after I restart the endgine. Am I overlooking something? :dunno: Link to comment Share on other sites More sharing options...
LEAD_NOT_FOLLOW Posted February 7, 2009 Share Posted February 7, 2009 http://www.greatlakesxj.com/tech/TPS.html Link to comment Share on other sites More sharing options...
88XJSport Posted February 7, 2009 Share Posted February 7, 2009 Ya you don't touch C. Just A&D for the input voltage, and A&B for the output, and divide. Refer to the link above. PS you owe us interior pics of your Manche. Link to comment Share on other sites More sharing options...
oldrusty Posted February 7, 2009 Share Posted February 7, 2009 are you sure your using the right procedure? They are different for the manual vs auto trannies. I used the same info from BLHTAZ when I replaced my tps a couple weeks ago and it runs awesome now. Bye the way TAZ thanks again :bowdown: :bowdown: Link to comment Share on other sites More sharing options...
glundblad Posted February 8, 2009 Author Share Posted February 8, 2009 Yes I believe I am following the correct procedure for the '87 5 speed. Once I put the probes in the connectors, they seem a little tempermental to get a voltage reading. Sometimes I really have to move the probe around to get a reading. Perhaps that is my problem? I have considered stripping the wire but that just sounds like a really bad idea for some reason. I can tell this engine really likes the new TPS even though I keep messing up the settings. It is starting to behave like I remember it so I know I am on to something. And yes I did have a picture of the interior after all. I promise I will post it on Sunday. By the way, I hope BLHTAZ doens't get mad since I misspelled his name. :brows: Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 8, 2009 Share Posted February 8, 2009 By the way, I hope BLHTAZ doens't get mad since I misspelled his name. :brows: :rotf: No problem...I don't do it for recognition. ;) I had the same issues with mine...it is very difficult to get the probes in there and get a reading. I found that it was easier to ground the negative lead to a remote source instead of trying to get both of them pushed in to the connector. I touched the negative lead of the tester to a good ground on the block and then only had to worry about getting the positive lead in to the terminal A connector and it was much easier. I had it adjusted and running good in just a couple minutes that way. I am not an electrical guru by any stretch of the imagination and someone may refute this idea for some reason, but after I adjusted it that way and tightened everything down, I went back and checked it with the probes in the recommended terminal locations and the readings were perfect there too :thumbsup: Link to comment Share on other sites More sharing options...
glundblad Posted February 8, 2009 Author Share Posted February 8, 2009 Thanks TAZ, moving the ground to the engine block really helped. I was able to get it dialed in pretty well. Unfotunately, it didnt do much good. The idle was either too high or too low. I began to feel sorry for the starter so I stopped. To me, that means I must have misdiagnosed the problem. I think I will need to take it to a Jeep dealer and pour money on the ground. But since I may have bought a new TPS while my old one was still good, I probably already waisted money anyway. :doh: Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 8, 2009 Share Posted February 8, 2009 Unfortunately...I did the same thing. I eventually found that my problem was a bad ground on the right rear side of the engine block and once I took all those ground wires and made sure they were in the right place and had a good clean ground, everything has been fine. I put my old TPS back on and sold the new "hardly used" one to someone on here for about a $30 loss, but that was better than eating the whole thing at $115 - $120... :thumbsup: Link to comment Share on other sites More sharing options...
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