I'm officially on vacation, and in anticipation of a large storm...I loaded up the quad and headed for Colorado at 6:30 p.m. last night. Got into Denver at 5:45 this morning. Had an interesting drive. Learned a few things.

6. When its dark outside, cardboard boxes, when large and brown and strewn about on the highway, look just like a herd of deer. BTW, any of you who live near Omaha, if you see about 70' of black rubber marks on Westbound I-80 just East of Omaha, remember, LISA WAS THERE.

5. My truck stops really, really well for a 8,000 lb machine hurdling down the highway.

4. Ogalala, NE realy does have the cleanest gas station bathrooms.

3. Three energy drinks and gas station coffee all in one night really screws up your stomach.

2. Sunflower seeds work great for fighting off sleepyness.

1. When you have a DP Tuner, and no overboost solution, and you have the truck set on cruise and it defuels on a small hill, the SES light will trip on. I have a code stored but no scanner. This brings me to the purpose of this thread.

I was tailin it down the highway somewhere in Nebraska at like 2 this morning and as the truck went down a hill and then back up (I know I found a hill in Nebraska, amazing) the turbo kicked on. I built up enough boost that the computer sensed overboost, and the truck defueld. Well, I had the truck in cruise..so when the truck woke back up again, the cruise went crazy and the truck got all the way up to 80 mph and then cruise kicked off and my SES light came on. Anyone have any clue what might've happened, or any further explination? I pulled over, shut the truck off and restarted and no SES light, and she drove great the rest of the trip.

 

Lisa, you hit 25 psi of boost ( or greater ) The SES would have most likely shut off in about a 1 or 2 minutes.. Glad you made it safe!!!

 

The freaky part was, I had cruise set on 70, not 80. Also, the SES did not go off. I had no safe place to pull off for oh, I'd say about 6 or 7 minutes. SES light shut off when I shut the truck off and restarted.

 

I am going to sit back and listen in then..I hope it is nothing to worry about!!

 

Glad you made it alive! Did you flat spot your tires????

 

I think it was a code that tripped because of the cruise control. I had the cruise set for a specific speed, and the engine couldn't maintain said speed because of defuel. I think thats what did it.

I am curious what the PCM experts have to say about it though.

Nolan I just went out and checked my tires...they are fine. I mean, they are a brand new set of tires so I have a lot less "nipples" now but...nothing more than that. Sure got my heart rate up. I wouldn't have been able to stop in time if a trucker up ahead hadn't flickered his lights off and on to warn me there was an issue.

 

Lisa, I've seen my truck (not yet chipped) on steep hills not be able to keep excellent cruise control, and when it starts losing speed in spite of the gently increased throttled, it eventually kicks the truck in the butt and sort of tromps the throttle a little bit... kind of like saying, "speed up.... speed up.... that's not enough yet.... come ON, now.... Speed it UP.... ok, then SPEED UP NOOOWWWW!!!".

Anyway, I expect that might be what you ran into and when your cruise finally kicked in hard, you hit the overboost limit just because of how nicely the DP programming knows how to respond to that last, urgent DEMAND for power.

Maybe I'm wrong...

 

This would be what I was going to say.
Oh, and my overboost code sets of the SES light at 24#. Sounds like you need one of those OBAs.
The light will go off on its own after about 10 miles or so.

 

Lisa FWIW you dont need to pull over to shut the ses light off just turn the ignition off then back on as your rollin down the highway and the light will go off and your truck will continue on and all will be good.

 

Glad you made it back in one piece. I too have noticed the cruise control freaking out when it cant get back up to speed like it wants. All my truck did was floor it, but darn did it floor it hard. What are you doing in CO? It would be cool to meet up, the truck has changed since you first saw it.

 

Doesn't the OBA take care of this? I have never had this problem and have read 30+lbs of boost many times....installed OBA w/ DPTuner????

 

OBA cured mine untill I really get on it and check engine light comes on. Me thinking my HPOP might need to be upgraded????

 

That is the point of the OBA, prevent the overboost code.
Glenn- could be, you'd need to find out what code you are setting.

 

Lisa, how long are you hanging around Denver? I have Autoenginuity.

 

Great offer Curtis!!!!