CStrain14

Now I'm gunna add, it's only when letting off the gas going to a coast. When I let off the gas I have to hit the break immediately to go to a stop, once I have my foot in the break its fine. It also did it today when I got home and shifted into park, rpms just go all the way down, no bogging when this happens

CStrain14

Anyone?

CStrain14

Codes I got were a camshaft position sensor which I just changed, and the p0171

xMUDKINGx

I read this post earlier and didn't reply because I didn't think I could be much help, but for some reason it just occurred to me that this happened to me only like 2 or 3 times right after I got my transmission built. Not sure if that had anything to do with it, but I never found a cause of it, no check engine lights, no DTC's, nothing at all, but the problem seemed to have sorted itself out because it hasn't happened in over a year. :knockonwood: it only happened when I would come to a yield and coast at like 4 or 5 miles an hour, I would go to step on the gas and nothing. I would then realize the truck cut off, I would shift into neutral, and start it again while still rolling, put it back into gear and continue on my way. I wouldn't worry about it too much.

CStrain14

It's just every time I coast, now it seems to be getting worse, once I come to a red light the rpms dip down to 250-300 ish then come back up to 500. As soon as I let off the gas the rpms seem to very quickly drop down to 500-600. I'm pretty much driving with 2 feet to keep it going. When j pulled into work tonight into my parking spot it immediately died,only battery light comes on with the check gauges.

CStrain14

I was told to check the IWE vacuum line. Is this common for them to come loose? And how do I go about finding this/putting it back on.

xMUDKINGx

Extremely easy, go to both front wheels, and look on the inner side where the CV axles meet your Hub that your wheels are mounted on. You will see a rubber hose on both sides. There's a spot for it to connect on the hub/IWE *see picture*

xMUDKINGx

I would also advise tracing those lines back up to the engine, they connect behind the throttle body. Make sure none of them are burned (common) or broken (also common)

CStrain14

They said there was a vacuum line between the firewall and the engine that's hard to get to and you need a camera to see, and if it's off its wicked hard to put back on. Is that the one?

xMUDKINGx

I'm not sure man, I have a 4.6L XL and all of mine are visible. No hard to reach ones that I can think of off the top of my head. Vacuum lines are simple however, if you pull one off and can't get it back where it was, just re route the line, just making sure it's not kinked or touching anything that moves or gets hot. If there is a hidden one back there, and it's broken, worrying about putting it back should be the last thing you should do. Fixing it should be the first priority.