Question about 2002 Chevrolet TrailBlazer

2 Answers

Hey i got a 2002 chevy trailblazer. it was running rough and started saying reduce engine power. well he cleaned the throttle body and changed some coil packs it crank up ran for about 5 min then cut off now it won't do anything . all gauges work battery is fine ,fuses are fine, starter is fine what could the problem be ? please help thanks in advance

Posted by on

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 4 Answers

I would suggest trying to retrieve codes, this would really help at least point to where the problem may be. I have seen several trailblazer come in for this same problem and the most common issues I have found are a bad crank position sensor and issues with anti theft. Both give you similar symptoms but will set different codes.

Posted on Sep 29, 2019

Ad

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

    Corporal:

    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 12 Answers

I would begin by looking at the fuses. Check for one labeled ECM or PCM... Those are the computers that control engine management. There are also fuses for the coil packs and fuel injectors.

Posted on Sep 29, 2019

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Anonymous

  • 1 Answer

SOURCE: Chevy Trailblazer 2003 ran the battery down now wont idle

try changing the air filter ,i had a problem ,at ilde in drive my trailblazer would stall, changed the air filter now it's not stalling and got my power back ,there is a secondary air pump that i have to change ,
not sure were it is ? still not running perfect but it's running better .and my service light is on too.
i got it put on scope ,it's the pump .
not sure if this helps ,but i'm start to run in to problems too,i have a 2004 trailblazer.
i like to do fix things myself ,i hope i can.it's the cost if you know what i mean.

Posted on Dec 18, 2008

Anonymous

  • 25 Answers

SOURCE: I own a 2002 Chevy Trailblazer with 4200 vortec

Do you know if the plugs were changed, a bad or broken plug will also cause rough idle and slow acceleration?

Posted on Oct 21, 2009

Anonymous

  • 1 Answer

SOURCE: Nissan b14 rough idle, black smoke

i have a nissan b-14 idle roughly sometimes cut off when in traffic. any solutions???????

Posted on Dec 01, 2009

alicantecoli

Colin Stickland

  • 22485 Answers

SOURCE: I have a 03 gmc envoy. My reduced engine power

sensors on the pedal?? not sure what you mean by paddel though never heard of this term before

Posted on Dec 14, 2009

Testimonial: "03 Envoy:My reduced engine power keeps happening. My car goes 20 mph. Changed throttle body, pedal, wiring. Need new thermostat. Car not heating up."

jaxtraw1976

Ray Wagner

  • 2 Answers

SOURCE: 2002 chevy trailblazer has rough idle

There are numerous things that can caise a vehicle to idle rough. Could be a throttle posistioning sensor. pcv valve, dirty fuel filter, worn spark plugs and wires, possible O2 sensor. If the vehicle has not had a tune up yet, I would recomend one. Even if it doesn't fix your issue, the vehicle is ten years old and probably needs on anyways. Start there, then rule out the cheaper stuff next. pcv valve and fuel filter, inexpensive and it's probably time anyways. If you are getting an engine code, stop in to advance auto. They'll plug it in for free. If your still having problems, you may have to break down and tajke it to a mechanic to get plugged into a real diagnostics machine.(probably run you around $100)

Posted on Feb 12, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2002 Trailblazer rough idling


First try cleaning the throttle body,make sure you take it off the intake manifold so that the rear side gets cleaned as well. While doing the cleaning, disconnect the battery so that the PCM will reset and relearn to the freshly cleaned throttle body.

Dec 18, 2012 | 2002 Chevrolet TrailBlazer

2 Answers

Chevy Reduced Engine Power and Auto Gear Transmission


still sounds like another sensor is bad. take it to shop and have it tested would be my suggestion. good luck.....

Aug 13, 2012 | 2002 Chevrolet TrailBlazer

1 Answer

My 2003 Chevy Trailblazer suddenly started running rough and stalling, It smelled like fireworks.


1st things first, clean your throttle body. Also, that smell is concerning, have a muffler shop do a back pressure test on the Catalytic converter.

Jan 23, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

The reduce engine power light has came on I have a 2002 Chevy Trailblazer, what does this mean?


A lot of times it's a filthy or sticking throttle body. With this situation, the computer will throw the reduced engine power light as kind of a safe mode. A lot of times, you won't be able to go past a certain speed too. With the battery disconnected, clean your throttle body with throttle body cleaner. Must be shiny. When finished, drive around for 20 minutes or so, so your computer can re-learn the correct settings of a newly cleaned throttlebody. When driving for 20 min, make sure all accessories are off.

Jan 27, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

Rough Idle 2002 Trailblazer 4.2L could it be the cam solenoid? It shows no code or service engine light but the idle is very rough


Clean throttle body first, make sure you disconnect battery foe about 30 minutes so PCM can relearn to cleaned throttle body.

Jun 27, 2010 | 2002 Chevrolet TrailBlazer

2 Answers

I got code p2176 I changed out the tps still got same problem did not have this problem with other engine just changed engine out now cant seem to get this code off causing the car to rough idle and low...


P2176=Throttle Actuator Control System - Idle Position Not Learned
Did you use all you old sensors,or is some of them from the new engine,I would swap out the IAC sensor or check for wires not hooked up.
If it can't relearn to idle the Idle air control might be different then your old one,but its not registering with the computer

Dec 17, 2009 | 2006 Chevrolet Impala

1 Answer

2002 Chevy Trailblazer


hi, those sound like throttle actuator codes. the throttle body on your vehicle should be an electronically controlled unit without wires to control actual acceration an deceleration. now, there is also an electronic switch called a potentiometer on the gas pedal that transmits signal to the throttle body to tell it what to do. most of the time, the throttle body is what goes bad here. you should also check the wiring to the unit for bad connection by wiggling the wire connector and seeing if the reduced engine power light comes on. if this happens, you will likely have to replace the wiring pigtail and the throttle body. but, in some cases, the gas pedal switch goes bad, and likely what is not allowing the transmission to shift out of park, the pcm may lock out the solenoid controlling the shifter. but, don't just run with that answer, it maybe completely wrong. i have seen more throttle bodies and wiring harnesses go bad than gas pedal switches in those vehicles. but you might want to have a shop diagnose further, it may even be two unrelated problems, or in the powertrain computer itself.

Mar 26, 2009 | 2002 Chevrolet TrailBlazer

Not finding what you are looking for?
2002 Chevrolet TrailBlazer Logo

Related Topics:

33 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

85219 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...