Question about 1997 Toyota Tercel

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Hesitation while accelerating. the car runs smooth until it warms up, then it hesitates while im accelerating. oxygen sensors and tps have been replaced along with fuel pump

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  • Expert
  • 161 Answers

Could be your PCV valve or air filter need replacement. Also could be your EGR system needs a clean out.

Posted on Dec 17, 2014

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Posted on Jan 02, 2017

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SOURCE: corolla, 2001

did you get the car on computer to see what our check engine light i seen problem with temperature sensor the temperature sensor if it defect let say in morning its colder like 60 degre 15 celcius but the sensor is reading 80 degre the computer will not give the same anough of gas hard start not enough gas hesitation hope it FIXYA our problem thanks pierre

Posted on Jul 04, 2008

mackinbeats
  • 46 Answers

SOURCE: Hesitation on takoff and on acceleration

it could be one of many things with that many miles on the vehicle. when if ever did you change the fuel pump last? both filter and pump may need to be changed. that's alot of miles remember that. the filter is under the hood on the drivers side mounted on the firewall. under the brake master cylinder. be careful to relieve the fuel pressure before changing it.

Posted on Apr 22, 2009

  • 40 Answers

SOURCE: engine light is on ,code P0171, hesitates when start driving

you will need a code reader to turn light off

Posted on Jun 02, 2009

  • 1 Answer

SOURCE: 1991 toyota corolla gts, acceleration hesitaion

change the engine. cost only 1,300usd.

Posted on Nov 19, 2009

  • 12650 Answers

SOURCE: O2 Sensor Problem?

yes an o2 sensor can cause those symptoms so can a minor vacuum leak --bad ignition wire -clogging fuel filter --sticking egr valve etc.

Posted on Mar 01, 2010

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Engine stumbles only in no load circumstances. Idles smoothly, and stumbles only in no


no miles stated, 400k miles> or 100 = 100k?
if any 95 has 100k miles that be like a new car. no ?
5k /year, wow...
trouble is i cant drive car. and see this effect.

the issue is acceleration, right? :called Hesitations !
and only happens on a hot engine , yes?
and never happens wide open throttle.? correct?
HAPPENS:
only when tipping in the throttle at cruise. (then self corrects )
THE TPS sensors does that.
The TPS is a demand sensor. it sees driver DEMAND
acceleration, and this is detected and the PCM goes to ENRICH mode. this is done or the engine goes LEAN until the MAP BARO READINGS, catch up and correct fueling.
that is my wild useless guess. (not driven and me not scanning the PCM while it fails.)

The TPS is a rate of change sensor.
This is because all air meters made are slow.
The TPS hides this fact. until bad.
there are other causes,but im not there with my scan tool..
and (box of gauges)

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1 Answer

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Hi there i have a 2000 v6 camaro and i just rebulit the top end of the motor over the summer my car does this same exact thing ive diagnosed it as a tps but my throttle body is all one piece and i have fly by wire system so its about 500 to replace. when its really cold in the morning it doesnt like to idle smooth also because if my coolant temp. sensor. For you i would recommend doing a compression test on all of the cylinders, checking for spark, and also check and possibly replace tps( throttle position sensor)..

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Sounds like either a MAP sensor or TPS or both. TPS will impact the throttle control and if its stalling once its warm, this would be where I'd look. Best of luck.
Greg

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Absolutely is the Problem! Please Rate My Response! Thanks!

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