Reparare TPS
de butysoft » 05 Noi 2006, 12:09
Pe cine intereseaza am gasit asta:
TPS Filter Construction - Bring a dead TPS back to life
Steve Clayton Gemcuttr1@cs.com sent this simple technique for filtering the output of a noisy TPS.
I did some experimenting and found that an electrolytic capacitor (440 microFarads, 35 Vdc) with the negative side connected to the SIG RETURN wire and the positive side hooked to the TPS SIG wire gave me absolutely *troublefree* operation! Even though my TPS is basically trashed, the capacitor filters out almost all of the electrical noise, and my auto tranny once again shifts like factory-new!
I dug into the wire bundle coming out of the PCM and soldered the capacitor as close to the plug as I could manage - thinking some "TPS problems" may actually be wiring/connector problems in disguise.
Results with other values were:
* 220 mF, 35 Vdc - too little filtering. Tranny a little flaky.
* 1000 mF, 35 Vdc - far too much filtering, and a 1.5 second delay in transmission shift response crept in.
BTW, I might add that since I added the capacitor, my cruise control hasn't dropped out even once in 15K miles - usually a twice-per-week occurence (I drive 1500 miles a week). What I believe is that the dropout problem is caused by an electrical noise spike from the TPS - which is *exactly* what the capacitor filters out.
aici http://dodgeram.org/tech/transmission/a ... adjust.htm
Daca are cineva probleme cu TPS-ul si vrea sa experimenteze sa ne anunte si pe noi de rezultate.
Totusi ma gandesc ca aceasta inginerie rezolva doar pentru un timp scurt problema si e posibil sa fie resimtita rezolvarea in cresterea consumului, nu atat de mult ca atunci cand este defect clar tps-ul dar mai mult decat fara inginerie.
TPS Filter Construction - Bring a dead TPS back to life
Steve Clayton Gemcuttr1@cs.com sent this simple technique for filtering the output of a noisy TPS.
I did some experimenting and found that an electrolytic capacitor (440 microFarads, 35 Vdc) with the negative side connected to the SIG RETURN wire and the positive side hooked to the TPS SIG wire gave me absolutely *troublefree* operation! Even though my TPS is basically trashed, the capacitor filters out almost all of the electrical noise, and my auto tranny once again shifts like factory-new!
I dug into the wire bundle coming out of the PCM and soldered the capacitor as close to the plug as I could manage - thinking some "TPS problems" may actually be wiring/connector problems in disguise.
Results with other values were:
* 220 mF, 35 Vdc - too little filtering. Tranny a little flaky.
* 1000 mF, 35 Vdc - far too much filtering, and a 1.5 second delay in transmission shift response crept in.
BTW, I might add that since I added the capacitor, my cruise control hasn't dropped out even once in 15K miles - usually a twice-per-week occurence (I drive 1500 miles a week). What I believe is that the dropout problem is caused by an electrical noise spike from the TPS - which is *exactly* what the capacitor filters out.
aici http://dodgeram.org/tech/transmission/a ... adjust.htm
Daca are cineva probleme cu TPS-ul si vrea sa experimenteze sa ne anunte si pe noi de rezultate.
Totusi ma gandesc ca aceasta inginerie rezolva doar pentru un timp scurt problema si e posibil sa fie resimtita rezolvarea in cresterea consumului, nu atat de mult ca atunci cand este defect clar tps-ul dar mai mult decat fara inginerie.
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Never drive faster than your Guardian Angel can fly.
Never drive faster than your Guardian Angel can fly.
- butysoft
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