Go Back   The Navara Forum > D22 > D22 Engine

Reply
 
Thread Tools Search this Thread Display Modes

Annoying boost issue
  #1  
Old 03-08-2019, 03:35 AM
GGD22's Avatar
GGD22 GGD22 is offline
Junior Member
 
Join Date: Apr 2019
Location: Queensland
Posts: 23
Default Annoying boost issue

Alright, so as the title suggests i have a boost issue, most common symptom is that the boost fluctuates between 10 and 15 psi when going at 2500rpm pretty rapidly aswell, sometimes the boost will hold at just 10 for a couple seconds then instant 15 psi and you can feel it. My guess is turbo is f'ed but just got a job and saving for something else, so if its no biggy i might leave it. Engine is zd30 have done swirl mod and egr block, Vacuum lines are pretty new aswell. Please help guys!

Also i have tried looking for this problem on the forum but cant seem to find anything in the search.

Sent from my VTR-L09 using Tapatalk
Reply With Quote
Sponsored Links

  #2  
Old 03-08-2019, 08:02 AM
tweak'e's Avatar
tweak'e tweak'e is offline
Advanced Member
 
Join Date: Oct 2008
Location: New Zealand
Posts: 4,539
Garage
Default

i would be looking for a boost leak or a crack in the egr tube.
__________________
D22 ZD30 egr+butterfly mod, 2" lift extra leaf springs, enk-tek dump pipe, 2.5" exhaust.
D23 no mods.......yet.
single cab workhorse, to muddy to clean
Reply With Quote

  #3  
Old 04-08-2019, 10:29 PM
GGD22's Avatar
GGD22 GGD22 is offline
Junior Member
 
Join Date: Apr 2019
Location: Queensland
Posts: 23
Default

I looked for boost leak before but couldn't find anything, i installed an egt probe on the egr port, couldnit be not sealing properly?

Sent from my SM-G900I using Tapatalk
Reply With Quote

  #4  
Old 10-08-2019, 04:38 PM
Horatius Horatius is offline
Member
 
Join Date: Sep 2016
Location: Aus
Posts: 150
Default

Any strange noises?

Is the hose to the pressure sensor ok, not kinked, blocked, cracked or anything? Is the sensor plug seated alright? Could be worth trying a bit of contact cleaner. A bit of a long shot. I didn't plug mine back in properly once after doing a bit of work on it, struggled to reach 10psi then it would come good occasionally. It was making intermittent contact, plugged it back in properly and all good lol.
Reply With Quote

  #5  
Old 11-08-2019, 07:19 AM
Horatius Horatius is offline
Member
 
Join Date: Sep 2016
Location: Aus
Posts: 150
Default

If it is a cactus turbo causing this, the impeller is probably hitting the housing causing the fluctuations. If so, it's not a good to drive it. If those little fins decide to break, they are going to go straight into the intake/motor.

It might be worth taking the front off the turbo and having a look, move the impeller around and check how much play there is.
Reply With Quote

  #6  
Old 11-08-2019, 11:39 AM
GGD22's Avatar
GGD22 GGD22 is offline
Junior Member
 
Join Date: Apr 2019
Location: Queensland
Posts: 23
Default

Ill have to check to the sensor hose tomorrow, it has a a boost t so ill just bypass it to test it and see if the connections ok.

I checked the turbo play when i pulled the manifold off to install the pyro sensor on the egr port and it seemed ok, the thing is i didnt have the problem before that.

Sent from my SM-G900I using Tapatalk
Reply With Quote

Annoying boost issue
  #7  
Old 12-08-2019, 08:30 AM
GGD22's Avatar
GGD22 GGD22 is offline
Junior Member
 
Join Date: Apr 2019
Location: Queensland
Posts: 23
Default Annoying boost issue

I forgot to mention it only happens in 3rd and 4th gear. Weird
Reply With Quote

  #8  
Old 12-08-2019, 08:38 AM
bods's Avatar
bods bods is offline
Advanced Member
 
Join Date: Sep 2010
Location: Orelia, WA
Posts: 4,896
Default

Sounds more like the neutral position switch, have you tried unplugging that to see if it helps? Also, try holding the gear stick over to the left and see if it stops it happening. Apparently that can indicate a failing switch...
Reply With Quote

  #9  
Old 12-08-2019, 09:46 AM
GGD22's Avatar
GGD22 GGD22 is offline
Junior Member
 
Join Date: Apr 2019
Location: Queensland
Posts: 23
Default

http://imgur.com/a/IKWV3av heres a link to me wingling my turbo, is it too much play? I checked the air sensor and its connected well.

Was driving home from bunnings and tried moving grlear stick to the left and didnt notice the issue, might have to try buying a new switch

Sent from my SM-G900I using Tapatalk
Reply With Quote

  #10  
Old 13-08-2019, 01:44 AM
Horatius Horatius is offline
Member
 
Join Date: Sep 2016
Location: Aus
Posts: 150
Default

The best way to try the neutral position switch is to disconnect it. I disconnected mine years ago after it played up, not worth the trouble of replacing it IMO as I never use the heat/high idle switch anyway.

Good suggestion from bods. Now that you say it's only happening in 3rd and 4th, that's exactly the symptoms of a crook np switch.

Had a quick look, it appears to be the 2nd switch starting from front and moving back, one closest to and slightly in front where gearshift goes through to the cabin.

If you disconnect it your problem will probably go away.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 01:26 AM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
| Home | Register | FAQ | Members List | Calendar | Today's Posts | Search | New Posts |