HPX and rough idle
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Senior User
Joined: Mar 2006
Posts: 434
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From: San Antonio, Tx.
HPX and rough idle
I am hoping for some reassurance from yall that everything is OK...
I just finished re-installing the turbo from its rebuild last night and since I was in there went ahead and installed the HPX and did the CCV.
I knew it was gonna run a little rough from everything I have heard here about getting air in the lines, but it is really rough.
Its so underpowered that I have to let the clutch out at over 1000 rpm to keep from bogging it down.
When I first started her up the SES came on and has been on since, no code reader, but im assuming an ICP code is being thrown.
I drove the truck to work this morning with the hopes of getting some of the air out of the system, barely broke 40, and had EGT's between 800-1000 and boost of less than 5 psi. The boost seams a little low, but the EGT's are way high.
Is this normal for an HPX? Is there something I may have missed?
Does the EBPV default to open or close if I didnt get a good connection on the solenoid?
I plan on changing the oil when i get home, since I am breaking the turbo bushings in (should have done this last night...). Not sure if this will help at all, but seems like a good idea none the less.
I just finished re-installing the turbo from its rebuild last night and since I was in there went ahead and installed the HPX and did the CCV.
I knew it was gonna run a little rough from everything I have heard here about getting air in the lines, but it is really rough.
Its so underpowered that I have to let the clutch out at over 1000 rpm to keep from bogging it down.
When I first started her up the SES came on and has been on since, no code reader, but im assuming an ICP code is being thrown.
I drove the truck to work this morning with the hopes of getting some of the air out of the system, barely broke 40, and had EGT's between 800-1000 and boost of less than 5 psi. The boost seams a little low, but the EGT's are way high.
Is this normal for an HPX? Is there something I may have missed?
Does the EBPV default to open or close if I didnt get a good connection on the solenoid?
I plan on changing the oil when i get home, since I am breaking the turbo bushings in (should have done this last night...). Not sure if this will help at all, but seems like a good idea none the less.
Cargo Master
Joined: Feb 2005
Posts: 2,837
Likes: 1
Man, sorry for your problems. I can't help much, but I can tell you that the EBPV defaults to open. It recieves an electrical signal from the PCM to command it closed. So unless it somehow got stuck closed, I doubt that has anything to do with it. Good luck!
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Senior User
Joined: Mar 2006
Posts: 434
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From: San Antonio, Tx.
OK, thanks for yalls help so far.
I will definitely go over it again with a fine tooth comb.
I cleaned all of the boots very well prior to re-install, the turbo spun freely and everything on the pedistal was clean. All in all it seamed to be a good install.
What sensors are on the top of the engine that I may have knocked loose?
I know IPR and ICP are at the front, then there is the EBPV solenoid. What is the sensor on the front of the spider? could that cause this sort of thing?
I will definitely go over it again with a fine tooth comb.
I cleaned all of the boots very well prior to re-install, the turbo spun freely and everything on the pedistal was clean. All in all it seamed to be a good install.
What sensors are on the top of the engine that I may have knocked loose?
I know IPR and ICP are at the front, then there is the EBPV solenoid. What is the sensor on the front of the spider? could that cause this sort of thing?
Posting Guru
Joined: Apr 2009
Posts: 2,447
Likes: 1
From: Northern Idaho
X2 on what jwhitetail stated and the sensor on the front of your spider is your temp sensor for the PCM. It measures the incoming temperature of the air into the motor. While you're at it, it wouldn't hurt to pull that sensor out and hit it with some brake cleaner and clean it up.
Besides that it is definitely a up pipe issue or intake issue. Be sure your EBPV is actually open and you didn't some how get it stuck close, be sure you're building boost and the one mistake some of us make is not getting the exhaust combiner on the back of the turbo completely seated. Leave the turbo a bit loose, connect that pipe, fasten it down then bolt the turbo down the rest of the way.
High temps means restricted exhaust or not enough air being taken in by the motor.
Besides that it is definitely a up pipe issue or intake issue. Be sure your EBPV is actually open and you didn't some how get it stuck close, be sure you're building boost and the one mistake some of us make is not getting the exhaust combiner on the back of the turbo completely seated. Leave the turbo a bit loose, connect that pipe, fasten it down then bolt the turbo down the rest of the way.
High temps means restricted exhaust or not enough air being taken in by the motor.
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
HPX install shouldn't cause those problems- did you forget to plug something back in or bump a plug loose while doing the turbo or HPX work? Something isn't right.
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Thread Starter
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Senior User
Joined: Mar 2006
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From: San Antonio, Tx.
Was talking with Clay earlier, he said that it sounds a lot like a UVCH. Most likely bumped it loose while in there.
Will check that first, then move on to the turbo if that doesnt do the trick.
Hit everything on the spider real good with brake cleaner prior to install, so the sensor is clean as a whistle.
Made a point to make sure the up pipes and the turbo were seated very well prior to clamping down, got that one first, then the up pipe, then bolted the turbo down.
Will do it all again if it may solve the problem.
Not sure if it makes a difference, but I am not getting any smoke at all at this point. Would assume that a turbo issue would maybe belch black smoke?
Will check that first, then move on to the turbo if that doesnt do the trick.
Hit everything on the spider real good with brake cleaner prior to install, so the sensor is clean as a whistle.
Made a point to make sure the up pipes and the turbo were seated very well prior to clamping down, got that one first, then the up pipe, then bolted the turbo down.
Will do it all again if it may solve the problem.
Not sure if it makes a difference, but I am not getting any smoke at all at this point. Would assume that a turbo issue would maybe belch black smoke?
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Thread Starter
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Senior User
Joined: Mar 2006
Posts: 434
Likes: 0
From: San Antonio, Tx.
Well, I feel kinda dumb. Turns out I slighly disconnected the passanger side wiring harness. She runs rough as hell on 4 cyl.
Thanks again for all of yalls help. As always, its great to be a part of this family!
Thanks again for all of yalls help. As always, its great to be a part of this family!
Posting Guru
Joined: Apr 2009
Posts: 2,447
Likes: 1
From: Northern Idaho
Don't feel dumb, crap happens. Heck I've taken things apart, put them back together and was ready to fire things up when I went to check to make sure I had everything in and no parts left over and said to myself "Oh S!!T, I missed a part!!!" and had to take everything back apart and get it back in! I hate doing the same job twice in a very short period of time!
