Skip the auto shop - Our mechanics make house calls

Q: gas pedal problem

asked by on

I was driving to work when my 04 chevy trailer blazer and it stop on my way to work so we pulled it to home so I seen it didn't have pressure so I replaced the fuel pump then I seen that the plug was burned so I change the plug and fixed the wires then I started to have problems with the pedal accelerator where I push the pedal and the gas was idling really high but if I would push the peddle to get it to idle less it will not do anything so I change the fuel pedal and it's still the same also when I change the fuel pump number 10 fuse pcm B 20 amp and this codes are not erase the keep coming back what can i check or what can i do

My car has 138000 miles.
My car has an automatic transmission.

A: It sounds like you have a problem with your...

It sounds like you have a problem with your pedal position sensor or throttle position sensors. Using a scan tool, test the pedal position sensor by reading the output of the sensor as you slowly press down on the pedal. The value should slowly increase as you press on the pedal. If they don’t or are erratic, further tests can be conducted to pinpoint which sensor is failing. If you need further help with this, a certified technician, like one from YourMechanic, will be able diagnose the high idle and can replace your pedal or throttle position sensor as necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Why is my truck overheating from start up?

Hi, I will be glad to help you. On refilling the cooling system you could have trapped air or air pockets. Such will prevent coolant circulation and the engine WILL overheat. There are typically air purge points in the system...

Q: The car continously switches off in the morning, basically it has a cold start but once on the road it is fine

Hello. Issues during cold start can be caused by many things. A few common causes are issues with the engine management or fuel system. Virtually all engines are designed to run with an increased amount of fuel during cold starts,...

Q: My headlights are not working correctly - 1996 Chevrolet Blazer

Hi there. Most of the time this is caused by a bad headlamp switch. When the switch fails, it will cause this to occur. If the switch is fine, then it may have an issue with the headlamp relay. I...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.