Throttle Position Sensor and Gear Shifting

165

Asked by Mar 09, 2013 at 11:12 AM about the 2003 Chevrolet Venture LT Entertainer

Question type: Maintenance & Repair

I read http://www.ehow.com/how_6774858_install-throttle-position-sensor.html (as advised by
master DavidH25 --- thanks!) and I quote..."The main component it (Throttle Position Sensor)
affects is the transmission, which will engage more aggressively with additional throttle."

Question is, if the Throttle Position Sensor is broken will your A/T vehicle not shift properly?

10 Answers

of course~ remember the old days with the 'kickdown link'? the modern equivalent has the same persuasions-

3 of 3 people found this helpful.
22,475

trans. shift is related to speed sensor,tps may have to do with trans pressure control for a quick response to acomadate this ,intresting?

1 of 1 people found this helpful.
165

Yes 7jimmy7, so if the TPS is faulty there wouldn't be a quick response from the tranny. Interesting...

2 of 2 people found this helpful.
20,775

the TPS tells the trans to downshift when you give it throttle. If it goes bad it will shift up and sown as normal but if you go to pass someone and put it to the floor it will stay in the same gear and will probably shift before 3000 rpm.

3 of 3 people found this helpful.
119,055

Most tps work on a 5 volt signal. Five volts is supplied to it and the signal coming back from it should range from 1 to 5 volts. At and idle it should read 1 to 1.5 volts on the signal wire. As the throttle is moved to full open position the volts should smoothly increase to 4.5 to 5 at full open throttle. If the voltage does not read in the ranges listed above or does not smoothly increase and decrease with the moving of the throttle it needs to be replaced. Will cause poor idle conditions, poor acceleration and in proper shifting just to name a few.

6 of 6 people found this helpful.
165

Thanks Andrew & Dandy, I will give both atry to test my TPS.

80

Will a bad throttle make your transmission make noises while shift

8 of 8 people found this helpful.
10

I have a 2002 infinti g20. first gear shifts at 3,000 rpms but it shifts smooth, but on all gears it stays at a high rpm. could this be my TPS ?

1 of 1 people found this helpful.
130

i have a 2004 chevy tahoe 5.3L V8 do you think the TPS causes the rpm to go high and not move any higher than 30mph

6 of 6 people found this helpful.
10

transmission noise ? bad water pump, any bad pulley can make a noise that will make you think a 100% that the trans is bad and it will play with your gears as the bad pulley are braking the engine and transmission tps? disconnect it if gears feels better then it is bad or need adjustment loosen it then move it up or down test drive it until it feels comfortable

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