Not familiar with the 09', just an idea. Maybe it has to relearn it idle settings?

N.E.O.

 

I would almost guarantee it's related to your remote start wiring. I haven't personally installed one, but I would imagine it has a sensor that has to see P or it won't start the vehicle. So there is some mis-wiring going on with that particular area of your install. Reread your installation directions VERY carefully and make SURE you have all the wires connected to the proper place. You may have to trick the remote start into thinking it sees P by sending it a full time +12v. If you can post what model of RS you installed, we might be able to help troubleshoot a little better. :chug:

 

Btw, another way to guarantee it's an electrical thing and not an idle/mechanical thing is to slightly raise the revs while holding the brake FIRMLY and then shift it into gear. If it still stalls out, then it's definitely electrical. Don't try this more than once though, since it's obviously not great for the tranny.

 

^ and ^^, re-read his post. You both have it backwards. It starts fine and runs fine, but only stalls when shifting OUT OF D or R and into P or N.

 

You're correct, I read the post backwards, but It still sounds like the remote start to me. There has to be sensors in the machine that tell it what gear the truck is in, that part of the system must be wired incorrectly, or shorting somewhere. I don't think either of us designed his remote start, so there is no way to know how it would behave if it was miswired, but the RS is the only thing he changed that has any effect on the truck running or not. The fact that he said if he coasts in neutral and then matches RPMs and shifts says to me it might be a flawed RS, but I stil bet it's wired incorrectly, especially since it was a DIY install.

Again, post what model Remote Start it is, and I'll try to do some research for you.

 

Another thing is this morning it took 2 tries to start the truck. So I guess after the truck has been running for a bit it starts fine, but after sitting awhile it needs 2 tries to start. And it is still stalling when shfting out of R or D into P or N.

Another observation was that if I shift it into N from R or D without putting on the brakes (i.e. I'm coasting on idle speed and then put the truck into N) the engine RPM's will drop real low and almost stall at like 100rpm and then it shoots back up to normal around 1100rpm. So it seems that it'll only consistantly stall only if I'm at a complete stop with the brakes when shifting into P or N.

 

Remove whatever you have installed and see if the problem continues.

 

Just to clarify, the R/S is an Autostart 6850 found here:

http://www.autostart.ca/prodInfo.php?alarm=1&starter=1&tw=1&prod=AS-6850TW-FM

And also, the one scenario where it almost stalls but doesn't is when I'm coasting in DRIVE and then put it into NEUTRAL, I don't touch the gas or the brake so there's no engine rpm matching on my part; simply the ECU making it's own adjustments.

BTW, I already have the brain of the RS disconnected and it's still doing this. all the wiring taps and relays are still in, but not connected to anything. I wouldn't think this would cause issues, but I will desolder and remove all the wiring in the next couple days and let you guys know unless someone else has other ideas to try first. Thanks.

 

I'm assuming the RS will start the truck in P? If not, then the problem is that the P sensor is not connected properly. What wire did you tap to get the signal? It may not have enough current to properly trigger the RS. But then you say you disconnected the brain, and it still kills. Sounds like a short somewhere. You have a long day of troubleshooting ahead of you.

Edit: Also, before you disconnect and unsolder ALL of the wires and relays, just try bypassing the relay that triggers the P sensor (if there is one). That could fall under the category of not receiving enough current to trigger the relay, and therefor would open the circuit.

 

Yes, the RS will start the truck in Park. There is no P sensor on the remote starter because the truck is an automatic tranny, it's up to the car to disable starting in anything other than park or neutral.

The only wires I've tapped into are, power, ign1/2, starter1/2, acc, power un/lock, door sensors, tach, brake, parking lights and maybe a few others but I can't recall off the top of my head. I only used 2 relays (one to drive ign1 and one to drive starter1; ign2 and starter2 are driven from the RS).

I hope nothing got fried in the ECU.

 

I hope nothing got fried in the ECU.

Everyone else kind of danced around the ECU, and I actually that is what it sounds like, an ECU issue. Not the necessarily the ECU itself being damaged, but something with the wiring that you did not allowing a signal to pass to the ECU that it is expecting or needs.

 

Ok, then I'd say try bypassing the 2 relays and see if the problem still occurs. If that doesn't fix it, I'm out of ideas.

 

very strange.

 

Indeed!

N.E.O.

 

things like this are really difficult to diagnose though without having the truck in front of you. i would suggest taking it to your dealer and letting them figure out what's going on.

 

Just an update to the situation. I desoldered the all the connections and relays to IGN1/2, Starter1/2, accessory, and power and the problem went away (Also, before I did this I started getting a trouble code P0340 and P0705). Also, before I unsoldered the connections, I first tried to just unhook all the connections to the remote starter but I was still getting the stalling. Only after I removed the relays and wiring did the codes all clear and stalling went away.

In hindsite, I probably should of tried to first unplug the relays from their sockets before unsoldering everything to see if maybe it was a stuck/defective relay problem.

Thanks to everyone for their suggestions.

 

The second code makes sense with your issue, but the first? Camshaft position sensor?

 

It's just the ECU getting confused because of the RS causing some short or closed circuit somewhere. It probably could have been any code really. You only get proper codes when everything is wired correctly.

 

is it automatic or manual?

 

have you ever heard of a manual transmission having a park position?