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02 trailblazer will not stay running after I crank it without a little gas. Replaced throttle body and still not working right.

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Need to check fuel pressure.
With out proper fuel pump pressure engine will not start or run. Here is a way to try to start engine. turn key on but do not crank engine over, turn key off, then turn key back on, do not crank engine over. Repete 3 or 4 times. This gets fuelpressure up to where it should start. Have fuel pump pressure tested. Replace pump as needed.

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Posted on Apr 21, 2017

Testimonial: "It did not work. It has set for 3 months but did not have this problem before I took it off the road."

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Posted on Jan 02, 2017

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  • 182 Answers

SOURCE: No gas

check or replace injector fuse or relay

Posted on Sep 11, 2008

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SOURCE: 1988 nissan pickup engine rotates but does'nt start.

it sounds like the injectors are not opening up man.. replace the injectores and this should fix your problem..good luck keith....

Posted on Mar 21, 2009

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SOURCE: S10 won't start after it rains. Replaced fuel

Dump the gas in the fuel tank

Posted on May 07, 2009

mustanglove0
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SOURCE: why wont jeep stay running without giveing it gas

throttle is set low, or you may have a fuel pump going out.

Posted on Aug 24, 2009

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SOURCE: Engine cranks over and starts, but won't stay running or idle

Fuel pump or fuel pump relay?

Posted on Mar 09, 2010

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2 Answers

2002 trailblazer lxt codes p1516 & p1220


First off when you say it won't start does the motor turn over but won't start or does it do nothing

Mar 29, 2014 | 2002 Chevrolet TrailBlazer

2 Answers

My 2002 chevy trailblazer wont stay started without the gas pedal pressed when released the car shuts off


Spray some carburetor cleaner directly into the throttle body (behind the tube from the air filter.) Tap the gas several times and repeat after a few minutes, making sure to run it long enough to clear excess cleaner from the engine.

Mar 26, 2014 | 2002 Chevrolet TrailBlazer

1 Answer

2002 trailblazer starts then dies immediately


Usually a stalling problem in hot weather is caused by an electrical part getting overheated such as a coil or a relay, or a fuel problem.
I doubt the O2 sensor would cause it to stall that quick. And if a sensor fails it should turn on the warning light.
You might want to have the computer scanned for codes even tho the light has not come on.
How many times do you have to start it before it keeps running ? Will it stay running if you open the throttle ?

Jul 31, 2012 | 2002 Chevrolet TrailBlazer

1 Answer

My 02 chevy trailblazer's rpm fluxchuates when


Many of the 6 cyl. engines are prone to carbon build-up in the throttle body. If this is the case, it is best to clean it off the car and is fairly easy to do. Remove the snorkel, 1 electric fitting on the throttle body (a little tricky) and one vacuum line on tb as well. Four bolts remove the tb from the engine and the throttle body can be cleaned with throttle body cleaner from any auto supply store. An o-ring attaches the tb to the engine so that you will not destroy a gasket during the repair. Pretty easy and should take less than 1 hour, but be careful of sharp edges in the throttle body.

Nov 04, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

03 trailblazer 4.2 l code p0172 has no power


P0172 02 sensor is detecting that the system is running too rich. An 02 sensor that is starting to go out will pull this code, but the following will cause the 02 sensor to throw this code as well:

A few things to look at. 1st thing I'd do is clean your throttle body with the battery disconnected. Use sensor safe throttle body cleaner, about $4.

From there, I'd look at your upstream 02 sensor, located on the exhaust manifold on passenger side of engine, very easy. Try and stay away from Bosch if possible.

New fuel filter, clean or replace your MAF sensor located on top of engine next to firewall. Also, probably time to change your spark plugs. I recommend A/C Delco 41-103, will idle better than other brands.

Jun 20, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

I went to a local repair shop because my check engine light is on. I have a 06 Chevy Trailblazer. The codes were P1400 and P0506. They recommended a fuel injection cleaning and clean the throttle body...


Definitely clean that throttle body...can do it yourself for around $7.

Instructions for doing it without removing the throttle body.

1. Disonnect the battery....very important so your stepper motor isn't ruined when moving the butterfly.
2. Remove the plastic resonator on the top of the engine (The black piece that says 4200 on it)
3. Remove the large rubber hose from the throttle body.
4. Clean away, with throttle body cleaner or Seafoam, I just use the blue shop towels to clean in there. Could use a plastic bristle brush also for more elbow grease. Be very careful, as the butterfly will cut you very easily, very sharp edges. Make sure you get all the gunk out of there, including any edges of gunk that may have formed, preventing the butterfly from opening and closing properly. Needs to be nice and shiny.
5. Hook the resonator and hoses back up, don't forget the little pcv hose on the front right corner of it.
6. Hook the battery back up and drive around for 20 minutes or so with all accesories OFF. The computer will relearn a properly functioning throttle body at that point.
7. Enjoy a little bettery gas mileage and horsepower


As far as the injector cleane....Buy a $10 can of Seafoam, that will clean the injectors. Look on Youtube on how it works, good stuff.

Feb 14, 2011 | 2006 Chevrolet Trailblazer Ext

2 Answers

The gas mileage on my 2003 Chevy Trailblazer is very bad. As soon as the gage left the full bar, it becomes a free fall, meaning the gas just drop down so fast. What should I do to improve my gas mileage?


Many reasons for this, from running bigger tires to a dirty air filter, to the way you drive.

#1 on your list, should be to clean your throttle body with throttle body cleaner, WITH the battery disconnected. When finished drive around for 20 minutes or so (with all accessories off), so the computer relearns a properly cleaned throttle body. You'll notice a difference in power and gas mileage right away with this finished.

Replace your 02 sensor upstream, right in the engine compartment where the exhaust comes off the engine, very easy to do and easy access.

Replace your spark plugs with A/C Delco 41-103's, these engines love these and will idle better than other brands.

Replace your fuel filter.....but if you decide to do the Seafoam suggestion below, change the filter after you've run it through a tank of gas, will be clogged with gunk after the Seafoam does it's job.

Also, one thing many of us in the Trailblazer community have done, is run Seafoam through your brake booster. Can get at any autoparts store or even some WalMarts. Look Seafoam up online, there's even a Youtube video on their site to show you how to do it. Basically, unplug the brake booster vaccum hose and **** 1/3 of a can through the hose. The rest you can put in the gas tank, or use a 1/3 in the engine oil, which would require an oil change very early.

With these simple and inexpensive things, you can get your mileage back up to normal.

Feb 01, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

What can be the reasons of 2004 trailblazer to burn a lot gas?


Many reasons, from running bigger tires to a dirty air filter, to the way you drive.

#1 on your list, should be to clean your throttle body with throttle body cleaner, WITH the battery disconnected. When finished drive around for 20 minutes or so (with all accessories off), so the computer relearns a properly cleaned throttle body. You'll notice a difference in power and gas mileage right away with this finished.

Replace your 02 sensor upstream, right in the engine compartment where the exhaust comes off the engine, very easy to do and easy access.

Replace your spark plugs with A/C Delco 41-103's, these engines love these and will idle better than other brands.

Replace your fuel filter.....but if you decide to do the Seafoam suggestion below, change the filter after you've run it through a tank of gas, will be clogged with gunk after the Seafoam does it's job.

Also, one thing many of us in the Trailblazer community have done, is run Seafoam through your brake booster. Can get at any autoparts store or even some WalMarts. Look Seafoam up online, there's even a Youtube video on their site to show you how to do it. Basically, unplug the brake booster vaccum hose and **** 1/3 of a can through the hose. The rest you can put in the gas tank, or use a 1/3 in the engine oil, which would require an oil change very early.

With these simple and inexpensive things, you can get your mileage back up to normal.

Jan 26, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

SHUTS OFF WHEN I TURN ON AC/HEATER


Easy one, around $7 to fix. The battery was recently unhooked right? Clean your throttle body (should be shiny) with throttle body cleaner ($7) while the battery is unhooked. Perferred method is to remove the throttle body, but can be done without removing it too, just won't be as clean as it could be. After you're done, drive the car around for 5 miles or so, your problem will be solved, and you'll get a little better gas mileage. Very common problem with TB's.

Dec 16, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

1999 Dodge Ram 1500 cold cranks but will not stay running


Have him remove & clean th IAC/AIS motor on the throttle body, and the port it came out of , as well as clean inside of throttle body if he hasn't done so already. Check and clean connections before re-assembling. Shouldn't take any longer than 1/2 hr or so.

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