I was driving down the interstate lastnight about 3 hours into my trip when I noticed the engine started to labor and eventually threw the CEL. It felt like it was missing on a cylinder or two. I was able to limp it to the next off-ramp and shut the truck down. I restarted and it ran fine for the rest of the trip.

I've noticed that when I start to get into it lately I can throw the CEL earlier than normal. I'm not sure if that has anything to do with or not.

The truck is nearing the 200k club and I'm started to think the HPOP is getting weak. I guess it could be the IPR, but it idles fine and starts ok.


Any ideas? It was running pretty rough when it happened.

 

Were you pulling or unloaded? Mine as soon as I put the stage ones in and the chip would set a cel at WOT empty. When I was pulling, it set it soooo easy, and ran like crap till I shut it down, I had to upgrade. Maybe mine was a little weak, but only had 147xxx miles on it. As soon as I changed it I had no more issues. You still have the stock 15*?

 

I was unloaded but pulling a decent sized hill. If I had to guess I was areound 10-12 lbs boost.

I think your right about the HPOP... It's still the stock 15 degree pump. There used to be a time when I could hammer it pretty good and never get a CEL. Now it happens all the time.

 

That would be my guess. I'd say that 15 has done you good but is just tired of trying to keep up with those big injectors..

 

x2 on what Darin said. Even after my baby bean injector install it would about knock my filling out jerking. A 17* or adrenaline is in order.

 

It did it again today going down the interstate. However, this time it started slow and never through a CEL. I had the cruise set and if I'd increase speed the engine would bog down.

The weird thing was I noticed that I was running 3-5 lbs more boost while it was running in this condition before I could pull over and restart. All other temps were normal. I can't figure out why it would be running more boost if speed and workload were constant?

I haven't studied hpops lately, but the Adrenaline seems to have a pretty good price.

 

FYI, the modded 17* from joey will handle the 180's alright and is quite a bit cheaper than the adrenaline. Contact Joey at terminatorengineering.com and he will help you out. If I remember right mine was pulling more boost when I had issues too, maybe working it harder to keep up speed, not sure. Weird how it did it just going down the interstate though..

 

15 is pretty hard to wear out.
I'd look elsewhere before blaming a broken pump.

 

I thought so too and I like the adrenaline.

 

He's still trying to run 180's and a DP tuner with a 15, not going to work for long even if it did before. I'd be replacing that anyway cause you know its not supplying enough oil. That takes that out of the equation for sure.

 

I agree with william. Im thinking its something else. Your first post said it acted up threw a cel restarted and it was fine. Pumps aren't weak then all the sudden get better after a restart. And when they get weak its usually working hard at full throttle or high boost struggling to keep up with oil demand not with the cruise going down the freeway unloaded I think you have something else going on. Im thinking sticking ipr. Did you ever scan the code? May not even be oil related

woohoo 1,000 posts!

 

The pump's not setting the cel. It's the demand for the oil and it won't keep up that could set it. The way his acted is exactly how mine was until he had the going down the freeway thing. Once I had the cel set I lost major power, after shutting down, power is right back with no cel. I'd scan for the code like Justin said then I'd get a gauge rigged to read the hpop pressure.

 

The first time it didn't I think it was running different for quite a few miles before I realized it started to fall flat on its face and throw the CEL. I was thinking that the road was just rough.

I don't have the ability to scan the codes. I agree that it might be something else. I put another 200 miles on it lastnight and it didn't have any problems. However, I was only going 55 mph.

IPR R&R might be in the works before I get the pump.

 

What happens with the 15's throwing CEL's is your asking for too high of a demand on the pump, so when the requested pressure doesn't equal the actual pressure it throws a CEL and goes to limp mode, even though you might still be getting enough oil.

I can only throw CEL's with my 15 if I lug my motor in 4th or 5th gear starting at 1200 rpm's or so.
Though, I know I'm starving for oil, cause my scangauge says it does even if I don't set a CEL.

I think there is a bit of error set in for requested pressure, and if it goes outside of that percentage, then it will throw a cel. A restart just throws it outa limp mode and your good to go.

If you get a bigger pump, just research it first.

 

Would this limp mode be the service engine soon light coming on and the overdrive off light flashing?