What makes a Chevy Trailblazer run too rough?

If an oxygen sensor goes bad, it can make your Trailblazer run too lean (or rich). A super lean running engine will often idle rough. The fuel injection systems job is to atomize the fuel into fine mist.

What are the sensors on a Chevy Trailblazer?

The oxygen sensors that are equipped in your Chevy Trailblazer are responsible for monitoring the exhaust to help the ECU determine the correct air/fuel mixture. Of all the sensors equipped in your vehicle, the O2 sensors may have it the hardest.

Why is the air filter on my trailblazer not working?

If you have reason to suspect that your Trailblazer’s air filter has not been changed in a very long time, or if you have recently been driving in tough conditions, it may be worth taking a look at it. It could be so clogged that there is not enough air getting through for quality idle conditions.

Why are the spark plugs on my trailblazer not working?

Spark Plugs – One of the absolute most common causes (if not the most common reason that your Trailblazer may be misfiring) is the spark plugs. Although most modern vehicles use iridium spark plugs, they still need to be changed at the manufacturers recommended interval.

Why does my Chevy Trailblazer not transfer power?

If your Trailblazer is too low on transmission fluid, it’ll will no longer be able to transfer power to the rear wheels. The power goes to the torque converter, and that’s the end of the line. You should check the transmission fluid immediately.

Why does my 2005 Chevy Trailblazer die at idle?

Clean it thoroughly and then take it on a test drive. Once the idle is re-learned, your problem will be solved. Also the radio control **** to turn channels or volume and on and off won’t work the radio and cd will switch back and forth,, what could could cause this — 2005 trailblazer.

Why is the spark chain on my trailblazer not working?

The timing chain (or belt) is responsible for keeping the upper valve train synced with the crankshaft. This is vital for spark timing. If the timing is off a little and the engine still runs, the timing belt may have skipped. If it has jumped too much the Trailblazer may not even fire.

Why does my car idle with my foot on the brake?

Rough idle with foot on brake at stop light or just sitting in park in driveway runs good while driving My car has 128000 miles. My car has an automatic transmission. This may be a sign of a failing idle air control valve.

Why does my Chevy Trailblazer have a rough idle?

While there are a variety of reasons your Chevrolet Trailblazer has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. See what others are asking about their Chevrolet Trailblazer. Get answers from RepairPal’s community of auto experts and enthusiasts.

What causes a Chevy Colorado to rough idle?

When one or more of these variables is off it can lead to a rough idling condition. Most of the time the culprit is going to be the ignition system, although there are a myriad of other causes.

What does it mean when your car has white smoke coming from the exhaust?

White smoke. Some white exhaust smoke is normal, especially when you first start the car. Condensation can turn to vapor, providing what looks like white exhaust. But excessive white smoke likely means coolant is leaking into the engine combustion chambers.

How often do fuel tank pressure sensors need to be replaced?

A vehicle with an EVAP system issue can be driven, but may get lower fuel mileage and run roughly. Also, a vehicle with an EVAP system issue won’t pass standardized state or federal emission testing. How often do fuel tank pressure sensors need to be replaced?

How can I Fix my Chevy Trailblazer idling problem?

Simple solution, clean the throttle body, connected to the electronic idling motor. This is a 2004 Trailblazer with the 4.2 inline 6 cylinder engine in it, but this issue is common with the whole generation, 2002-2009 (1st generation Trailblazer, and other vehicles with the same engine/throttle body/electronic idling motor). Simply…

Can a Chevy Trailblazer stall at any time?

Stalls can happen at any time, and it can be incredibly jarring when it does happen. Before troubleshooting any automotive issue, including stalling issues with the Trailblazer, make sure that you check the vehicles trouble codes with an OBD2 scanner.

Why is my Chevy Trailblazer running rough at idle?

Really, your Trailblazer will be running rougher at any RPM, but a misfire will be most pronounced at idle. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your Trailblazer happens to have them, they can go bad and cause a rough idle.

What causes a Chevy Trailblazer to run out of gas?

A couple things to check….look to see if the fuel pressure regulator is leaking, that would cause a problem like you describe. Also, if the intake gasket has a vacuum leak, it cause the same issue, but go away after the truck has warmed up a few minutes. Either of those two things can cause the issue you’re having with your Sierra.

What causes a bad throttle position sensor on a trailblazer?

Here’s a great article on diagnosing a bad throttle position sensor from cars direct. MAF/MAP Sensors – These sensors are responsible for air measurement. When they go bad, your Trailblazer may not be letting in the right amount of air for a quality air/fuel mixture. Here’s more on diagnosing a bad mass airflow sensor .

What causes a trailblazer to shake when idling?

Here are the main components of the ignition system, as well as what would cause them to make your Trailblazer shake when idling. Fouled plugs can cause a misfire, which in turn causes an idle shake. Spark Plugs – One of the absolute most common causes (if not the most common reason that your Trailblazer may be shaking) is the spark plugs.

When did the Chevy Trailblazer lose its power?

Just reaching 30k miles and things starting to go out: little things: door switches, squaky and rattling noises. This is last american car for me seriously, the darn Honda Accord I had 10yrs ago was purring like a kitten at 180k miles with 32 mpg.

Can a Chevy Trailblazer lose power on OnStar?

vbell, my information came from a news report that stated that OnStar can now reduce engine power to newer OnStar equipped cars. They do not “deactivate” a car, they reduce power to a safe level so the driver cannot speed away. I would pose the question directly to OnStar, not Chevy or GM.

When did I buy a 2002 Chevy Trailblazer?

We bought a 2002 Trailblazer from AutoRama about 4 months ago, if even that. But about 2 weeks ago I was driving and got lost on the highway and ended up 6 hours later home. But what would normally take me about 20 minutes up the highway from where I finally figured out where I was]

Why does my Trailblazer stall at a stoplight?

These were just some of the most common ones. A dirty throttle body can lead to stalling in your Trailblazer. If you let off of the gas coming to a stoplight and it stalls for a second or two and recovers itself, it very well could be a dirty throttle body that is causing the problem.