Question about 2001 Chevrolet Blazer

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When you push the gas pedal half way the motor wants to smother out we changed the o2 sensor the maf sensor the throttle position sensor and it still does it what can i look for next

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Hello: You have spent a lot of time and money already. I would recommend you use a back pressure gage and check for a restricted exhaust system (possibly a plugged catalytic converter) Anything above 1 psi indicates a restricted exhaust. It screws in where the 02 sensor goes in front of the catalytic converter.

Posted on Nov 15, 2010

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Posted on Jan 02, 2017

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What does a throttle positioning censor for an 05 ford focus look like


I suggest you google 05 ford focus throttle positioning sensor. This sensor keeps you air intake throttle at the proper position when the engine is cold and changes position when the engine has warmed up. to locate the sensor, remove the hose that comes from the air filter housing to the engine. the hose you removed was connected to the air throttle. you can manipulate the position of this throttle by having someone push the gas pedal down slowly while you watch the throttle move. notice that the gas pedal cable is connected to the mechanism that opens and closes the air throttloe. also notice that beside this mechanism, you have an electric throttle positioning sensor. Pay close attention to the existing throttle positioning sensor before you remove it if you are planning on replacing this sensor. because if you do not install the new sensor in the same degree that the old one was in, you will throw the calibration off. word of advice. buy some throttle cleaner from your local auto parts. turn the car on with the air filter to throttle body hose off and have someone push the gas pedal down slightly to keep the engine from turning off. spray the throttle body cleaner til all the black crud comes off the inside of the throttle body. this dirty crud is what was making your throttle stick and not working properly.

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I have a 2001 kia sephia and when i press the gas pedal down the car spudders i changed the fuel filter and it still happens took it to auto zone said mass airflow sensor signal range/performance also said...


The diagnostics said the MAF sensor and Throttle position sensor (TPS) are not performing well. The TPS has the most significant effect and you should fix this first, buy a used one on Ebay and change it, its very simple to do if you can reach it. The MAF sensor has a metal wire that sits in the airflow and it can be cleaned by a cotton-bud dipped in acetone, but this sensor affects efficiency, failure would not cause misfiring.

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2002 GMC ENVOY 4.2L While the service engine soon light was on received code p0171 but the light didnt stay on. When going down the highway it loses acceleration and when you try to press the gas its as if...


Your vehicle has electronic throttle control .Position sensors in the gas pedal an throttle postion sensors at the throttle body tell the PCM/ECM -engine computer , how much your foot is pushing on the gas pedal an where the throttle plate is located . These postion sensors wear an can cause this problem ! I suggest you take your vehicle to a qualified repair shop an have it diagnosed .

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Have you checked the fuel pressure yet ?

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P0068 on a 2006 Dodge Ram 1500 SLT. Rough "hunting" for idle. Momentary lag/loss of power from a stop. Random RPM changes while at a constant speed. Sometimes it feels like it drops out of gear...


P0068 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of power
- Engine rough idle Possible causes - Large vacuum leak
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P0068 DODGE Description The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing Throttle Position (TP) to Mass Air Flow (MAF) readings. If, during a self-test, the comparison of the TP sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a diagnostic trouble code is stored in continuous memory.

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My 99 f350 shakes like a teenager trying to learn how to drive a stick when i push on the gas pedal more than half way has anyone seen this before


Hi and welcome to FixYa!

If that's the case then there are two reasons why it shakes. A faulty TPS (throttle position sensor) and a faulty MAF (mass air flow) sensor. You definitely have vacuum flow irregularities that's why the car shakes. The TPS and MAF is located on the throttle body and by replacing it the issue can be resolved.

Hope this helps and thank you for using FixYa! Have a good one!

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you have water in gas your going to have to drop gas tank and clean or you can try gas cleaner maybe that will fix the problem.

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Sometimes when I press the gas pedal the acceleration isn't as powerful.it feels sluggish and has a loss of power.i can push the pedal to the floor and it moves foward slowly.other times it will work...


Change air filter and TPS (throttle position sensor). It is subject to Physical wear. (1992, Age). A dirty air filter can put the MAF sensor out of range.

May 23, 2017 | 1992 Lexus Sc 400

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Accellerating


What fuse did they change? Are you sure it wasn't a relay or sensor they changed? You need to check the computer codes and test the fuel pressure. It wouldn't be a clogged catalytic converter if it happens only occasionally but could be a bad O2 sensor, fuel pump or filter, fuel pressure regulator, VSS (vehicle speed sensor), dirty throttle body or bad IAC motor, throttle position sensor, MAF sensor. See there's lots of things to check that's why you need to check the codes and fuel pressure first.

Apr 16, 2009 | 1992 Volkswagen Passat

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