Question about 2000 Pontiac Firebird

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Need location of tps on 2000 ls1. car redlines from first to second, have to let off gas for it to shift

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Follow the wires that go to the throttle. the tps is attached to the same area. it tells the computer what you are doing with the gas pedal.so look for it along the same pivot the wires affect. it will be on the opposite end of the rod that moves when the wires cause the butterfly to open. it will have a three wire connector attached to it. Hope this helps if not reply and we will figure this out. good luck

Posted on May 03, 2010

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Posted on Jan 02, 2017

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I have a 2002 Celica GT 5-Speed and I shift at about 4k RPMs when getting on the highway and I still feel I'm accelerating to slow. Am i doing something wrong?


Not driving a corvette? Just kidding. More details are important. How slow is your acceleration? Is it 0-60 in 8 seconds, or 20 seconds? What is redline on your car? If redline is 5K then 4000 is a good responsible shift point. If redline is 8K then shifting at 4000 is probably robbing your engine of it's torque and horsepower band. I believe the GTS model has an 8K RPM redline, the GT may be lower, but in that case, shifting at 4K is too soon for strong acceleration. Your Tachometer should have redline clearly marked. For responsible use, stay below that, maybe 10-20%. For economy stay further still, but for power you need to let the engine use it's RPMS, especially smaller and fewer cylinder engines usually don't make their power until they are half way through the RPM range and above.

Nov 13, 2013 | Cars & Trucks

1 Answer

Transmission wont shift to second gear


The vacume hose on the vacume modulater on the trans mission is nt hooked to full engine vacume or the engine isn't making vacume.The governer will make the trans shift to second anyway at redline but it's preety hard on an old car to redline it just to find out/ It's possible that youv'e got the shift detent cable that hooks to the carb set too tight or it's stuck as if it's floored. with the cable disconnected it should shift out al the way real early as long as thirs vacume on the modulater. Gas mileage freaks that drive around slowly unhook th shift cale so the trans shifts into high gear real early. Not much for passing and acceleration but they get a little bit better gas mileage.

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I have a 2000 ford f150 4.2 six and the overdrive transmission wants to downshift when coasting or gas is depressed at 55 and 60 mile per hour. works good all other times. the down shift is in and out many...


Start with checking the TPS, A bad TPS will cause this type of problem. Make sure that the wire harness is good and if it is, then good chance that the TPS will need to be replaced.

Feb 22, 2010 | 2000 Ford F150 Flareside SuperCab

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2002 Dodge Ram 1500. 5.9 V8-518 tranny. New filter/fluid/governor pressure sensor/pressure switch. No trouble codes showing. Need to redline the engine to get it to upshirt 1-2, and 2-3. Once in 4 and 5...


Did you test the TPS ( throttle position sensor)?

The automatic transmission uses throttle position sensor to determine position and opening of throttle, and to decide when to shift into gear.
IF throttle position sensor is defective, the car may have problems shifting into one or more gears, and you may also get no error code from OBDII scanner.

The TPS is tested reading volts on the TPS contacts, while someone else from inside the car smoothly press the pedal.

If the TPS is bad, the voltage will not change smoothly, but there will be gaps and peaks in voltage.


If the TPS is ok, then the next step will be checking the transmission shift solenoid pack located in the valve body. This are tested measuring Ohms on solenoids, and cheching if they get powered. This is unlikely the problem, as you would get a P0700 code from TCM.

Finally the TCM (transaxle control module) may be faulty. This may also return no code, as the TCM will think it is doing its job. This fault is also rather uncommon, and can be tested reading voltages on TCM connectors to TPS.

At a glance, from your broad description, you have a faulty TPS.

Feb 10, 2010 | Dodge Ram 1500 Cars & Trucks

1 Answer

My 2000 gmc jimmy seems to have problems shifting initially in the first gear, and lately it has been redlining to 5000 rpm before shifting from 4th gear ( i think). I feel like one day it is just going to...


1-2 shift is delayed and harsh, may not shift into OD: Check Throttle Position Sensor (TPS) for smooth and linear electrical response over the entire range of motion. If not, replace.

This is one of the things i can think of that would cause the issue you gave me. Start with that since it's simple and the other thing to is you can try resetting the ECM.

Turn the ignition key to the run position (engine not running) and pull the ECM fuse out for 30 seconds. Place fuse back in and start the engine, the engine may stall but let it. The ECM is relearning the engine and transmission and then go for a test drive after idling for 1min. The transmission my be running back good as new, if not. Have the TPS checked if not replaced. Good luck and keep me posted.

Nov 05, 2009 | 2000 GMC Jimmy

1 Answer

My legancy 2000 automatic gear shifts at ruv 3400 rpm .is it normal?


depends on gas pedal position,the lighter you are accelerating the earlier the trans should shift,if it always hangs on in gear get it looked at...as it can shift at redline (5000-6000 rpm,if you hold the gas peadl down fully).

Oct 28, 2009 | 2000 Subaru Legacy

1 Answer

Car wont shift untill redline or high rpms


If it wont let you shift make sure you have transmission fluid, i am guess its going to be your TPS which is your throttle positioning sensor it should be located near the back of the engine, Unplug it and plug it back in,

May 15, 2009 | 2000 Kia Sephia

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I cannot locate my dome light fuse for my 2000 Saturn LS1


it is under the hood, drivers side fuse panel bottom right hand corner of panel

Apr 27, 2009 | 2000 Saturn L-Series

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2000 NISSAN MAXIMA TRANSMISSION SLIPPING


If you havent already try to change the transmission filter.Sometimes when the filter gets dirty fluid pressure is comprimised and certain pumps and solenoids which control shifting inside the transmission function off of the fluid pressure,

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