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#1
10-02-2005, 09:41 PM
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Throttle Posistion Senser
I just recently picked up a 92 Chevy K-1500 5.7 after doing some maintenance work to it I developed a high idle. So I researched the forums and changed out the EGR Valve,EGR Silenoid,Map Senser,Coolant Temperture Senser,TBI Gasket and the Throttle Pos Senser (TPS). I got rid of the high idle problem but now it shifts hard going into Second. After reading the Haynes manuel it said that I had to change the TPS and the TBI at the same timeand I really hope this isn't the case. I checked the voltage on the TPS and I got it set around .65 volts but I am only able to get around 3.7 volts at WOT. I know that the TPS is non-adjustable but I can vary the voltage some on it's mount between .55 to .7 ish. So I my questions are:
1.Is my New TPS Senser bad or do I need to tweak it some? 2.How do I find out which Tranny I have to determine if the TPS is what is causing the hard shift? 3.What is a scan tool to check the TPS properly? Thanx....... 
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#2
10-03-2005, 01:02 PM
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Re: Throttle Posistion Senser
I am pretty sure that in 92, you would have a 700R4 (4L60) and not a 4L60-E; therefore, the TV Cable is used to control shifting not the TPS sensor.
Use this link to verify the correct adjustment of the TV Cable http://www.tciauto.com/instructions/...ble_adjust.htm //2000CAYukon
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#3
10-03-2005, 07:37 PM
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Well after messing around with the TV cable I was able to correct the hard shift....
I crawled up under the truck to take a look around and noticed a hose hanging from around my transmission. I traced the hose up and it connects to the top of my tranny. Does anyone have any idea what this is or where it would go? I diddn't see anything obvious to connect it to.
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#4
10-03-2005, 08:57 PM
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Re: Throttle Posistion Senser
Quote:
//2000CAYukon
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#5
10-03-2005, 09:50 PM
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Re: Throttle Posistion Senser
That's right it is a vent. It should have a clamp somewhere on the trans to clamp it to, If not, don't worry about it, just wire tie it up to something high.
__________________
Matthew Brough  1997 Geo Prizm -- 301,000 miles 2000 Honda Accord -- 225,000 miles 2004 GMC Yukon XL -- 223,000 miles 1987 Jeep Comanche -- 116,000 miles 
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