06 Wont Start

[djtaron]

I have a 2006 TB that will not start. Last night I was going to the store and got about 10 feet from the drive way and it just quit running. I tried to restart it and it just turns over and over. It wants to fire over but just wont. It did fire up after a while but would not stay running for more then 2 sec. I have been looking on the web for engine codes and how to read them without a scanner but had no luck. It looks like my only option is the dealer. It has about 47,000 on it. Any help would be great.:(

[DrumMedic965]

Something possibly fuel related? Sounds like it isn't getting enough/any gas.

[Intense_Customs]

I thought the same thing but i hear the fuel pump kick on in the tank. It could be the filter may be full of stuff

[Intense_Customs]

do you know of a web site that I could find out how to check the engine codes without using a scanner

[KNBlazer]

OBDII I don't think you can check the codes without some sort of Data Link Cable either to a laptop or a scanner... on the OBDI you could just ground it and it would flash the codes for you through the check engine light..

you should start off with the easy stuff such as checking for vacuum lines.. did you have any work done in the engine bay? ... also check your fuses and relays both in the engine and the BCM... if you see a relay or fuse that says for fuel pump or something with the ignition swap it out with another one just make sure that the one you are using as a diagnosing aide isn't intended for ignition...

[Intense_Customs]

No work was done to the vehicle since I have had it, just oil changes. I also checked all the fuses and stuff last night and switched some around just to see if that could be it. But still no luck.

[PROSPHOTO]

do you know of a web site that I could find out how to check the engine codes without using a scanner

As far as I know, this is only possible on Cadillacs :undecided

:iagree: that it sounds fuel related, but was unable to find any bulletins specifically related to your concern.

I did find one that mentioned poor fuel causing excessive deposits on the valves...leading to a stall-no start condition. The bulletin mentiones the symptom accompanied by a P0300, random misfire code.

Was your check engine light on prior to the vehicle stalling?
What kind of gas have you used the life of the truck? (not octane)

You can see if there is an auto parts place near you that loans out tools; they may loan out scanners http://www.unixboard.de/vb3/images/smilies/sm-nachdenk.gif

Also...under User CP, click "edit profile" & fill out your vehicle information for us :cool:

[cbwilsha]

If you have Onstar active, just punch the Onstar button and they can read the codes for you.

[Intense_Customs]

I wish I had onstar. Well I got it started by pumping the hell out of the gas. But now if I turn off the car it wont start and I have to pump the pedle again to get it fired up. I dont know if it could be the fuel or just the filter.

[PROSPHOTO]

Thanks for updating your profile...what about the questions?

The fuel system only has 2 modes of operation during start-up...
Start-up: predetermined air/fuel ratio based on throttle position
Clear-flood: reduces the fuel injector pulse width in order to increase the air to fuel ratio. This only occurs while the throttle position is at wide open throttle.

How did it run when you got it running? Was the check engine light on? Flashing?

[Intense_Customs]

I got it running for a while and it trow up the check engine light. I called a buddy that had a scanner and he came right over to read it. It said P0230 twice. Which is a fuel pump relay control circuit. So I went to Advance and bought a new relay, put it in and still will not fire. I have no idea now and I am really trying to stay away from the dealer because I know they will put a new hole in me. But to look on the bright side I think I found out what is wrong with it

[cbwilsha]

Why are you worrying about the Dealer and what he might charge? You still should be under warranty unless you've already got more than 36,000 miles. So any repair should cost you zero even if he has to tow it to the dealership.

[PROSPHOTO]

Since you already changed the fuel pump relay, you only have a few possibilities...

-an intermittent open/poor connection in one of the wires for the fuel pump control circuit or:
---Check the ground connection, #4 in the diagram below
---Check the connection at the PCM , connector 1, terminal #37

-a fuel pump control circuit failure in the PCM (bad PCM)

http://memimage.cardomain.net/member_images/7/web/2551000-2551999/2551515_109_full.jpg

This circuit does not monitor the fuel pump operation; so that is not where your problem lies :no:

Good luck diagnosing this...I'm guessing a poor ground.

Oh, BTW...have you recently done any mods to the truck or cleaned the engine compartment; anything that may have disrupted these connections?

Why are you worrying about the Dealer and what he might charge? You still should be under warranty unless you've already got more than 36,000 miles. So any repair should cost you zero even if he has to tow it to the dealership.


He's got 47K on the truck

[KNBlazer]

try disconnecting the battery for 30 minutes maybe that will help you out.. clean out the throttle body if necessary also...

[Intense_Customs]

Even tho the code reads fuel pump control circuit, could it still be poss. that the ignition switch is bad. I know i have seen alot of post of ign. switches going bad on TB. Oh and by the way I checked all the connection on motor, and grounds. They seem to be tight and not loose. Where is the PCM located and what is that.

[PROSPHOTO]

For your PCM question, Click Here (http://forums.trailvoy.com/articles.php?do=viewarticle&artid=9)

Based on the circuit description and schematic, I doubt the ignition switch will cause just this failure http://www.unixboard.de/vb3/images/smilies/sm-nachdenk.gif

[Intense_Customs]

thanks for all your help. you have really norrowed down a lot of things for me. I guess this is what this site is all about. But on the other hand is there any way of maybe cleaning the PCM to see if it may have gotten sh... in it or is there really no may to find out if that is the problem but to put a new one in and hope it fixed it.

[PROSPHOTO]

The PCM is sealed and the connectors are [supposed to be] weather tight; there's no way to clean it out without causing damage.
The possibility would be a loose terminal connection or the terminal backed out.

[Intense_Customs]

ok here is where i stand. My boy came over that has a trailblazer also, so I pulled his PCM out and put mine in his, Now his would not start. So Im thinking good now I know it my PCM....so now I put his in mine to see if it would start mine and nothing. So we put his back in his car and his started up fine. Is there any difference between PCM's in different TB.

[PROSPHOTO]

You would have to do a security re-learn...

Actually, I do not think that PCM's can be swapped without a dealer or programmer re-flashing them for the specific vehicle :no:

[Intense_Customs]

Ok well with all the things we have talked about in this thread. Do you think that my PCM is bad. Because everything checked out ok or looked good. But there is really no way to check the PCM right. Where would I be able to get one at a reasonable price and would it be cheaper just for me to go aftermarket?:(

[PROSPHOTO]

PCM failures are very uncommon; but if it is a PCM failure, the PCM should be covered under the federal emissions warranty for 80K miles :yes:
The next step would be to check the wires & connections from the PCM to the relay and from the relay to the ground (continuity) because you could also have an open wire :undecided

I think you should check your owners manual and let the dealer check it out :yes:

[rjgnwdc]

dealership ought to fix it right up. :yes:

[Intense_Customs]

well i took it to the dealer. They had it for 3 days and the first two they had no idea what it was. Finally the called GM technline and had them walk them through what was going on. Well it did turn out to be the ignition switch. I just didn't want to start throwing parts at it not knowing what the problem was. But to all the guys that helped me on trying to fix it. I just want to say thanks. And if you ever get a chance come check out my website, I just finished another fiberglass speaker box for a 06 TB.