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i am an idiot 
Platinum - Posts: 13,667
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: June 23, 2009 at 9:10 AM / IP Logged  

i am an idiot wrote:
No you didn't keep me up, but since I too stayed at the Holiday Inn Express last night, I was able to find a recall on that vehicle. It does refer to the Engine Control Module and it does talk about engine stalling.
The first one on this page

The blue line that reads "The first one on this page"  click it, it is a link to the page at motortrend.com

Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB
KPierson 
Platinum - Posts: 3,527
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Joined: April 14, 2005
Location: Ohio, United States
Posted: June 23, 2009 at 1:05 PM / IP Logged  

It sounds like you have a fuel problem.   :)

I would check each injector to make sure they are pulsing when the vehicle is running - if an ECU injector output shorted it would cause the injector to stay open constantly, which would cause misfiring, clogged cats, and terrible fuel milage.   This could be checked with either a 'scope, a frequency meter (should be around 11hz at idle and go up with RPM), an LED,  or, if nothing else is available, a volt meter. 

Another thing I would check is fuel pressure - too much pressure can cause simlar issues to yours.

That recall covers stalling under deceleration - I doubt that has anything to do with dumping too much fuel at all times but it would be a good starting point.  Typically, fuel injected vehicles do not inject at all while the motor is heavily decelerating and most likely the ECU wasn't restarting to inject at a high enough RPM to keep the motor from completely stalling.

Kevin Pierson
dvaldez0989 
Copper - Posts: 98
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Joined: June 11, 2009
Location: Texas, United States
Posted: June 24, 2009 at 8:52 AM / IP Logged  
say if this was the prob could it be resolved with a blown fuse or does the pcm have to be replace??
KPierson 
Platinum - Posts: 3,527
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Joined: April 14, 2005
Location: Ohio, United States
Posted: June 24, 2009 at 9:09 AM / IP Logged  

Well, it depends on the exact problem.

If the output transistor is fried you would need to replace the PCM.  However, it is possible that the fuel injector trigger wire is shorted to ground somwhere - if that is the case there is a chance that if you fix the wiring issue it will fix the problem.

You have determined that you have a fuel delivery problem, now you just need to figure out what cylinder(s) the problem is on and take the steps necesarry to rectify the situation.

Kevin Pierson
dvaldez0989 
Copper - Posts: 98
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Joined: June 11, 2009
Location: Texas, United States
Posted: June 24, 2009 at 10:18 AM / IP Logged  

the snap on solus shows me to be cylinder four and cylinder six the only problem with checking the injectors is that they are under the intake manifold so you cannot check it while the vehicle is running. you have to take the manifold off to get to the injectors.

KPierson 
Platinum - Posts: 3,527
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Joined: April 14, 2005
Location: Ohio, United States
Posted: June 24, 2009 at 10:34 AM / IP Logged  
You don't need to check the actual injectors, just the wires running to the injectors.  Most injectors have two wires - a constant 12vdc (which we can assume works) and a switched (-) coming from the PCM.  Go to the PCM and measure the voltage there on the suspect cylinders.  If you have constant voltage (which would be my first guess) then you can go to the next step and unplug the PCM harness - if the fuel injector wire is still showing ground then the problem is in the wiring - if the injector wire goes to 12vdc or floats then you know the problem is in the PCM.
Kevin Pierson
dvaldez0989 
Copper - Posts: 98
Copper spacespace
Joined: June 11, 2009
Location: Texas, United States
Posted: June 25, 2009 at 8:31 AM / IP Logged  
does anybody have any access to ALLDATA so i can see what wire colors the injectos are
i am an idiot 
Platinum - Posts: 13,667
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Joined: September 21, 2006
Location: Louisiana, United States
Posted: June 25, 2009 at 8:53 AM / IP Logged  
Can you not see the 2 wires on the injector itself.  There shold be a wire color that is on all 6 injectors.  The other wire on each injector is the trigger wire for that injector.
Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB
dvaldez0989 
Copper - Posts: 98
Copper spacespace
Joined: June 11, 2009
Location: Texas, United States
Posted: June 25, 2009 at 9:20 AM / IP Logged  
i would have to take off my intake manifold to get to it that is why i am asking
tommy... 
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Joined: December 10, 2004
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Posted: June 29, 2009 at 7:59 PM / IP Logged  

dvaldez0989 wrote:
i would have to take off my intake manifold to get to it that is why i am asking

So even w/ the colors...How are you going to check them if you cant see them...?? All 6 of the injectors are under the manifold...??

M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!
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