Help: Truck starts then dies

could be leaky fuel injectors. have you changed the spark plugs?

 

I haven't changed the plugs. This should be the next thing I do

 

Id definitely change the plugs and check the gap prior to install. They might be due a change and gapped too much right now. Just a possibility.

 

There was a thread here awhile back that sounded alot like this problem. Turned out to be the engine disable security thing acting up during the cold.
I searched for awhile but could not find that thread.

 

Yeah that sounds like my problem. Only in the cold then when it warms up a bit it gets better if I can find that thread that would be helpful. I have also been searching on the forum for something similar but couldn't find anything

 

So I just filled up with 93 oct and filled it with the ISO Heat that says its supposed to remove water and be an antifreeze fuel additive. I also just changed out the spark plugs for Denso k20HR-U11 with a gap of .040. The plugs that were in there seem to be in good shape but they were

$47 NGK LFR6AIX-11 -6 PCSNEW

NGK LFR6AIX-11 gapped to .050 - .053. The truck is still starting up no problem.

The real test will be tomorrow morning. The temp will drop down to -5 tonight.

 

I experienced a similar problem with my 2007 SR5 V6. The truck would start up, and then die a few seconds later. The problem came out of nowhere while driving on the highway, the truck just shut off. No CEL present, so it made diagnostics that much harder. I started troubleshooting step by step, using the problem symptoms table in the factory repair manual. I got to the FUEL PUMP RESISTOR, and found the fault, an open circuit inside the resistor. The resistance should be between .70 and .76 ohms between the two pins on the component side of the connector, as stated in the manual. I then jumped the plug with a paper clip and it fired right up! Replaced the part, and away I went. Hope this helps someone out in the future!