04 Ford F150, remote starters

I am about to my wits end with these vehicles. I have been doing vehicle electronics installs for over 13 years and recently got into remote starters. I have put a few on now and am working with a set of identical Ford F150 trucks that I consider light duty but they have  4 doors and factory keyless entry. I have installed a Crimestopper RS-850 remote starter on both vehicles and the corresponding bypass module sold to me by my distributer. I should be able to make the units work without the bypass as long as the key is in the ignition barrel, so I am told. That did not work so I installed the bypass module and tried it with that connected, still same problem. The problem is this, I push the start button, the truck turns on until the security LED goes out, about 2-3 seconds, then it starts the truck. About 2 seconds after the truck starts and runs the security LED flashes 1 time and at the same time it flashes the truck shuts off. It does this 3 times before the starter resets. I first thought it was faulty equipment but I put the second unit on the other truck and it does the same thing. I am posting here only because of everything I have already tried from the suggestions of the Crimestopper technical joke line and from the tech at the distributer. I have tried Crimestoppers suggestion of leaving the headlights on for 8 minuites to "drain off excess battery voltage" which did not work, the other tech was a little more helpfull. He suggested adding the tach wire, the keysense wire, checking my ground, and not to use scotch locks or t-tap for my connections. I added the tach wire, added the keysense wire, moved my ground to a factory ground and removed my scotch lock connecters and used butt splices to make my ignition harness connections. I even run a dedicated 8 awg wire straight to the battery for my A+ feed. NOTHING has worked and I am about to give up. Please if anyone has had this problem or might be able to tell me something else to try I do not know what else to do. I have to be overlooking something but I can't figure it out or it is so simple I am making it hard. I have about 10 hours of labor in these now and 6 of that is troubleshooting.

Thanks in advance to anyone with any help,

Joey

What bypass are you using? Are you using one with the loop that needs to be wrapped around the ignition barrel????

Can you start the truck with the key....then keep it running with the remote start? (take the key out)

If so, check to see if your unit has accs. and Ign. outs working properly

mo12v, I am refering to the factory LED on the dash that blinks 1 time after the truck is running. Also, no I am not sure if the unit is PATS or transponder as I am new to this and am having to rely other peoples info. The bypass module is for a PATS system and is what my distributer sent me when I ordered. How can I find out what it is, it uses a big black key.

ziggyb222, yes I am using a small module that has a red power wire, a black wire that goes to the out when running, and yes it has a loop that goes around the key cylinder. I have tried putting the ring on the back side and on the front side of the factory ring but no luck.

KarTuneMan, I have not tried that as doing so would grind the started when the module engaged. It does not have the anti grind optin install.

Thanks for any help given.

Sounds like you have the Transponder Key.

You should also be able to START vehicle with Remote Start with Key inserted  in Ignition Switch.  If not:

Vehicle with the TACH wire hooked up......

Also is the GRAY Hood PIN wire hooked up or used????