Overboost pressure (P0234) popping off my Weeks Kit 1 hose?

Infinite_Karma · **Posted:** Tue Mar 01, 2016 9:00 pm

Hey yall,

For a little back story, I never really solved the mystery of my Overboost (P0234) problem (http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=83543), and so now I'm being careful not to push the vehicle into 2500+ RPMs unnecessarily (no flooring it on uphills to pass other cars or anything) so the P0234 CEL/DTC hasn't popped up again yet...

BUT! I've had this strange thing happen twice while accelerating up a slight hill at about 2400RPMs (going about 50 MPH) over the past three days:

The first time it happened, I heard a loud pop sound while driving uphill on the freeway, and then there was no acceleration while stepping on the accelerator. So, I pulled over and looked inside the engine compartment and noticed that the Weeks Kit Stage 1 "Short-Hose" popped off the engine mounted "Adapter Front" piece, clamp and all (just sticking up right there). Luckily the hose clamp didn't fall onto the road or get lost. I quickly loosened the clamp, refit the hose and clamp, and tightened it down snug and strong, making sure it was solid.

The second time it happened, I was on my way back to work driving up hill (up a mellow grade), going about 50 MPH (RPMs ~2300+) and it happened again, this time throwing a P0299 DTC / CEL. I pulled over, fixed it again, and made sure to thoroughly wipe down the surfaces where the Short-Hose and the Adaptor Front connect, so that they weren't so slippery. I also tightened the clamp more than before.

I have mine installed correctly, like this

and so I'm wondering if the Overboost is pushing this apart, or if I need to improve the connection point for the Small-Hose and the Adapter Front.

I welcome any and all suggestions.

Thanks,

Sarma.

diesel_guy86 · **Posted:** Tue Mar 01, 2016 9:34 pm

Did you ever measure the boost pressure? You need a gauge hooked to it, not reading from an obd tool. Im pushing 30+psi with my setup and havent had a hose or clamp come off yet.
Make sure that clamp is TIGHT, snug wont do it.

WWDiesel · **Posted:** Tue Mar 01, 2016 10:05 pm

I had a very similiar problem with my Dodge Cummins with 40+ psig boost with silicone hoses. Kept blowing two of the hoses off when pulling a heavy load uphill or passing. Solved problem by installing new super heavy duty constant pressure spring loaded clamps and cleaning all metal to silicone surfaces with brake cleaner and then spraying 3M adhesive on the mounting surfaces before clamping. Have not blown a single hose off in over three years now since I done this!!!! :BANANA:

I also used the glue trick on my Jeep CRD when I installed the Weeks kit and new silicone hoses..... :wink:

Like these:
http://www.turbohoses.com/Clamp.htm

flash7210 · **Posted:** Tue Mar 01, 2016 11:33 pm

My Weeks elbow has popped off half a dozen times.
I finally got rid of the clamps that came with it and just used regular screw type hose clamps.
Hasn't popped off again and I'm pushing 27psi out my turbo. (yes, I have a boost gauge)

weeks101 · **Joined:** Mon Jul 30, 2012 3:29 pm **Posts:** 747

As most of us know by now, excess oil vapor from the PCV system condenses and flows through the intake system on these engines. When the elbow is removed, this oil residue can coat and lubricate the elbow, coupler and clamp surfaces, which can cause the elbow to pop off. Additionally, if the stubby adapter is not seated in the elbow, or the clamps are tightened on top of the bead-rolled edge, this can cause the elbow to pop off.

Give this a try:

- Fully remove the elbow, coupler and clamps
- Wash all components in warm, soapy water to remove ALL oil residue. Let dry.
- With the stubby adapter still installed, use a damp rag with soapy water to remove all oil residue. Let everything dry thoroughly
- (Optional) Spray the inside of the coupler with hairspray (yes, it works wonders!) Reinstall before the hairspray dries, while it's still tacky.
- Important: Make sure the stubby adapter is "seated" in the elbow. The two parts are designed to fit very snugly together, with the stubby adapter actually going inside the elbow - ever so slightly.
- If you tighten one or both of the clamps on top of the bead-roll, it will likely pop off.
- I also advise tightening the clamp on the elbow first, then the clamp on the stubby adapter, in that order.

:rockon:

mass-hole · **Posted:** Wed Mar 02, 2016 12:54 am

I would check your boost pressure as well if Week's suggestions are not the answer. if you are blowing the elbow off repeatedly it could be getting up very high. An OBD scanner like TorquePro will only show you up to 2550 mbar(~23 psi) so you may need an actual gauge. I've written test tunes up to 2600 mbar and never had an issue but have seen my Torque app hit the 2550 ceiling.

Patrick Henry · **Posted:** Wed Mar 02, 2016 2:13 am

I too had the exercise of having my short hose blow off repeatedly. Like weeks recommended, I solved it by disassembling the coupling pieces and thoroughly cleaning all the oil and carefully fitting the pieces back together. I also replaced the intercooler outlet hose with an IDParts hose. The OEM hose (2nd replacement) had a gooey oil saturated rot feel that certainly was not helping the situation. Everything has been tight for the last couple thousand miles but now I carry a spare coupling hose in the Jeep for insurance.

Infinite_Karma · **Posted:** Wed Mar 02, 2016 3:03 am

Thanks everyone for the great recommended fixes, and now for me to do them!

I'll do the quickest and easiest first, and go from there.

diesel_guy86 & mass-hole, I haven't connected a gauge to measure the pressure yet (honestly, I don't know how to check it, what type of gauge to get, nor where to connect it to in order to measure the pressure). I'll research that and figure out what to do, since it would probably be a good thing to know.

WWDiesel, I frikkin love those Super HD Spring Loaded Clamps! I just might have to get some, and possibly install them if all the initial cleaning/de-greasing, drying & tackying, and reinstalling doesn't work.

flash7210, I was thinking the same thing if I had some clamps big enough, but I'll probably go with the Super HD Spring Loaded clamps cuz I like overkill.

weeks101, Thanks for the detailed explanation and the step by step instructions for cleaning and reinstalling. I like the hairspray idea, since it isn't too much of a heavy-duty adhesive (in case I want to remove them for some reason and not have to deal with the adhesive remains). I'll definitely do the installation with the stubby adapter last.

Patrick Henry, thanks for the reinforcement of the cleaning fix, I'm on that for sure. I also appreciate the recommendation about checking my intercooler outlet hose, since that could be contributing to the future problems of blowing a hose.

I'll update yall when I've done this all and tested it out for a bit.

I'm hoping I can drive over to join Geordi here in my neck of the woods tomorrow. He's working on juliecracker's TB replacement and 4J/1G Thermostat Assembly install, so that'll be fun to meet and help out if need be.

Infinite_Karma · **Posted:** Thu Mar 03, 2016 4:33 pm

So I cleaned every surface and the stubby silicone hose and the O-clamps with soap and water. I dried them and sprayed hairspray on the contact points when installing. Hopefully that will fix that problem for now.

I intend to get some constant-torque O-clamps if these pop off again.

I also plan on getting a Pressure Gauge installed, and I wanted some feed back from folks about the best ones out there (like maybe the Sasquatch one https://shop.sasquatchparts.com/products/2005-2006-jeep-liberty-crd-combo-gauge-pod-boost-gauge/)?

And if there are any new or old threads (with active photos or working hyperlinks) that I could use to follow the installation (many of the older ones don't have active/live pictures anymore, and the hyperlinks aren't live anymore either).

Thanks!

Sarma.

flash7210 · **Posted:** Thu Mar 03, 2016 5:20 pm

The Sasquatch kit is very nice because it comes with everything you need.
I bought from Amazon a VDO 0-30psi mechanical boost gauge. It required me to make my own bracket for mounting on the dash and it works very well.

The hard part about installing a boost gauge is drilling the hole for attaching the fitting. Some folks have drilled directly into the intake manifold and tapped the threads for the fitting.
I chose to drill into the weeks elbow because its thinner aluminum.
Not as clean of an install as some others because I didn't have a thread tap, but I made it work.

weeks101 · **Joined:** Mon Jul 30, 2012 3:29 pm **Posts:** 747

The CAC endtank is probably the easiest place to drill and tap for the sensor. The plastic is nice and thick in this spot:

rob40wilson03 · **Joined:** Sun Jul 10, 2011 9:43 pm **Posts:** 51

weeks101 wrote:

The CAC endtank is probably the easiest place to drill and tap for the sensor. The plastic is nice and thick in this spot:

Anybody have a DIY link for this?

I want to install a boost gauge before I do my Weeks kit. I suspect that my intake elbow is badly clogged. It feels very low on power. I assume a before and after boost pressure would differ quite a bit if the elbow is indeed clogged?

Thanks!

flash7210 · **Posted:** Fri Mar 04, 2016 10:53 am

http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=82966&hilit=Boost+gauge+install

weeks101 · **Joined:** Mon Jul 30, 2012 3:29 pm **Posts:** 747

rob40wilson03 wrote:

Anybody have a DIY link for this?

This is the drill and tap you need - https://shop.sasquatchparts.com/product ... it-18-npt/

1 - Mark where you plan to drill the hole
2 - Remove the CAC hose from the CAC outlet
3 - Insert shop vac. into CAC outlet to suck up the plastic shards. Add duct tape to secure in place.
4 - Using the drill bit, drill your hole
5 - Using the tap, create the threads
6 - Install the included hose barb - DO NOT OVERTIGHTEN
7 - All done! Finish boost gauge installation...

rob40wilson03 · **Joined:** Sun Jul 10, 2011 9:43 pm **Posts:** 51

weeks101 wrote:

rob40wilson03 wrote:

Anybody have a DIY link for this?

This is the drill and tap you need - https://shop.sasquatchparts.com/product ... it-18-npt/

1 - Mark where you plan to drill the hole
2 - Remove the CAC hose from the CAC outlet
3 - Insert shop vac. into CAC outlet to suck up the plastic shards. Add duct tape to secure in place.
4 - Using the drill bit, drill your hole
5 - Using the tap, create the threads
6 - Install the included hose barb - DO NOT OVERTIGHTEN
7 - All done! Finish boost gauge installation...

THANKS!!

Am I correct in my assumption that the boost pressure would probably be lower now (if the elbow is clogged) and increase after the installation of your kit?

weeks101 · **Joined:** Mon Jul 30, 2012 3:29 pm **Posts:** 747

rob40wilson03 wrote:

THANKS!!

Am I correct in my assumption that the boost pressure would probably be lower now (if the elbow is clogged) and increase after the installation of your kit?

Possibly. Even if boost pressure is the same, the flow rate is certainly less if there is a restriction, which will indeed have performance implications.

crasher · **Posted:** Mon Mar 21, 2016 4:14 pm

weeks101 wrote:

The CAC endtank is probably the easiest place to drill and tap for the sensor. The plastic is nice and thick in this spot:

Sorry if I'm missing something obvious, but;
What is the 2nd tap into that CAC endtank for?

Thanks.

weeks101 · **Joined:** Mon Jul 30, 2012 3:29 pm **Posts:** 747

crasher wrote:

Sorry if I'm missing something obvious, but;
What is the 2nd tap into that CAC endtank for?

That's a thermocouple probe used for R&D purposes, in developing our intake heater kit for improved cold weather starting.

There is another probe in the intake manifold. The probes are for measuring the intake air temp before and after the heating element.

mass-hole · **Posted:** Tue Mar 22, 2016 8:29 pm

weeks101 wrote:

crasher wrote:

Sorry if I'm missing something obvious, but;
What is the 2nd tap into that CAC endtank for?

That's a thermocouple probe used for R&D purposes, in developing our intake heater kit for improved cold weather starting.

There is another probe in the intake manifold. The probes are for measuring the intake air temp before and after the heating element.

I was hoping it was for testing a performance CAC :BANANA:

weeks101 · **Joined:** Mon Jul 30, 2012 3:29 pm **Posts:** 747

mass-hole wrote:

I was hoping it was for testing a performance CAC :BANANA:

We looked into it. No room to work with, and non-standard core size made it pricey to produce. I am not opposed to the idea, but if we did one, it would be a limited production run. Pre-orders only, and would need a minimum number of orders to make it happen.

Overboost pressure (P0234) popping off my Weeks Kit 1 hose?

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