When i run my truck hard on stage 3 or 4 i dont get the SES light when i'm running it, but when i come to a stop and it is cooling down the light comes on... Is my HPOP on the way out if so how can i tell???

 

Here's a simple smoke check that might help diagnose it. When you mat the throttle, does the smoke clear normally, then start smoking again as you approach redline? This is a good sign the HPOP is not supplying enough pressure without the aid of a scanner or pressure gauge. When it get's really bad the truck will pull hard off idle, then nose over when the revs get up.

Mine is having a similar issue (to include the light/off throttle SES) and it falls on it's face hard abouve 2800 RPM. SInce my scan tool refuses to pull a code I'm building a hydraulic line and gauge to plumb into the head. That way I'll be able to see if the ICP and IPR I have will correct the issue.......before laying out the looooooong green for a pump.

 

instructions courtesy of SWAMPS

If you don't have access to a scantool, then go to your local hydraulic supply house, and have them make you up a mechanical gauge. You might spend $60 or so on high pressure hose, fittings, and a quality 0-3500psi liquid filled gauge....but having this hose available for future diagnostics might be more valuable than you think.

The hose which you will need will need to be about 40" long, rated for (minimum) 3000psi working pressure (12k psi burst rating!) with the gauge on one end, and a #6 female JIC swivel fitting crimped onto the other.

You will also need an individual fitting to screw into the head to go from the head to the hose.

This single fitting will be a 90degree fitting # 5 "male boss" (sometimes called # 5 o-ring) on one end of the 90, and a # 6 male JIC on the other end of the 90. Our local hydraulic shop would label such a fitting as 5MB-6MJ90

"JIC" is nothing special...it's just 'hydraulic talk' for a 37degree flare fitting...standard hydraulic stuff here...nothing rare by any stretch.

Looking at the top of (either) cylinder head, you'll see the factory stainless braided oil lines (one to each head) then you'll see a few bronze colored plugs... (Engine off, of course) Using a 5/8" wrench, remove any one of the bronze plugs, and install the 90deg fitting into the hole. (save the plug for reinstallation , after testing). and the O-rings are reusable, unless brittle, cracked, etc...

The single 90deg fitting will have a "jamb nut" on the O-ring side...screw the fitting into the head, "aiming" the 90 away from the turbo, intercooler pipes, etc...and then tighten the jamb nut, to "squish" the O-ring also locking the 90 from "spinning" around as you attach the swivel end of the hose to the 90. No sealants, loctite, or teflon tape are needed on "JIC" or O-ring fittings...and don't overtighten them...usually about 180degrees with a wrench past finger tight...check for leaks prior to getting too far from home...

run the hose, away from moving parts, electrically conductive junk (like batteries, glow plug relay, starter relays, etc) ..and just route the hose up through the cowl toward the windshield...for short term testing purposes, we just lay the gauge up under a windsheild wiper, and go drive...testing it just like I describes previously...chip in the highest setting, floor the truck, etc....

If you can maintain 2800+ psi of ICP, then any injector 250cc's and under will perform exceptionally well.

If you can maintain 2400psi then that's not bad, not great either.

2200psi is mediocre, and full performance from any injector will not be achieved with that HPOP, though power WILL go up with nearly any injector, driveability (excessive smoke) might be an issue.

If you cannot maintain 1900psi, you might seriously consider an aftermarket dual HPOP system, or our Gen3 HPOP. Nearly any larger injector is going to make the truck feel sluggish, and smoke excessively.

 

That's the only piece I was missing.....the thread boss size in the head. Now maybe I can put this thing together next week. Thanks again Brandon, that's two I owe you.

 

it will blow smoke continuously on stage 2 running it from a stop till about 85 (thats what my speedo says, but i know it is off because of the tires) on 3 the same thing happens but it is more smoke and is a lot blacker, but when i stop and let it idle down to cool the turbo sometimes the SES light comes on, but not all the time...any ideas

 

I have one, if you want it. I used it to check my HPOP pressures, and with a snubber the gauge wasnt very responsive, and without a snubber it destroyed the gauge. I can take a pic of the included stuff, the gauge reads 2000 or so at ambient, but with a new gauge youll be good to go. I mounted this to the wiper cowl, ran the hose through the wiper cowl and into the compartment. Let me know if youre interested, im not using it, and i can send it your way.

 

Yeah man....I've got a 5000psi hydraulic gauge coming, so I think I'm good there. But you can save me a couple of trips to the hardware store. PM sent.