D24T.com  

Go Back   D24T.com > Technical Discussion Area > Diesel Engine and Drivetrain

Reply
 
Thread Tools Display Modes
  #1  
Old 02-13-2015, 03:27 PM
Nidarus Nidarus is offline
Member
 
Join Date: Jun 2014
Location: Sweden, Sundsvall
Vehicle: Volvo 740 "A-Traktor" D24T converted from B230K -87
Posts: 31
Default Tdic with NA pump

Hey i have a problem with my 945 tdic.
The problem is that the engine "hooks" on my rpm. So when i go over 2000rpm my engine slooooowly revs down. Right when it goes under 2000 i falls down to idle just like i should. Any ideas? And why im making this post is cause i wonder if it would work with a NA pump istead of turbo. Any ideas?


Posted from iphone so sorry for misspells
Reply With Quote
  #2  
Old 02-13-2015, 06:12 PM
745 TurboGreasel 745 TurboGreasel is offline
Senior Member
 
Join Date: Sep 2012
Location: Freedom CA
Vehicle: 85 745, 84Suburban 96Ram
Posts: 509
Default

Will it run, yes. Run to full potential? no.
Is your throttle arm on the correct spline?
Reply With Quote
  #3  
Old 02-14-2015, 08:18 AM
Nidarus Nidarus is offline
Member
 
Join Date: Jun 2014
Location: Sweden, Sundsvall
Vehicle: Volvo 740 "A-Traktor" D24T converted from B230K -87
Posts: 31
Default

here is some videos on the issue. both in engine bay and in the driver seat.

https://www.youtube.com/watch?v=3sIA...ature=youtu.be

https://www.youtube.com/watch?v=tauL...ature=youtu.be
Reply With Quote
  #4  
Old 02-15-2015, 04:10 AM
michaelovitch michaelovitch is offline
Senior Member
 
Join Date: Jun 2011
Location: France
Vehicle: 245 d24 NA
Posts: 179
Default

EGR acting up ?
Sticky egr valve maybe.
Try the same with the egr valve disconnected.
__________________
[SIGPIC][/SIGPIC]
Reply With Quote
  #5  
Old 02-15-2015, 10:09 AM
Nidarus Nidarus is offline
Member
 
Join Date: Jun 2014
Location: Sweden, Sundsvall
Vehicle: Volvo 740 "A-Traktor" D24T converted from B230K -87
Posts: 31
Default

oh ur a member here, big fan of your d24 videos on YT. anyway ya i have thought about block of the egr, but what should be the easiest way to check it without having to remove the pipe from the exhaust and so on. i saw that theres a yellow "tube" from the egr at the air intake manifold, is that the one?
Reply With Quote
  #6  
Old 02-15-2015, 11:29 AM
michaelovitch michaelovitch is offline
Senior Member
 
Join Date: Jun 2011
Location: France
Vehicle: 245 d24 NA
Posts: 179
Default

I didn't read your complain well enough.
My bad.
No egr related.
Otherwise you would have problems when rpm rise,not the opposite.

It must be in the pump.
Somebody maybe added some fuel,the idle is screwed a bit because of that.

The idle rpm is regulated by a centrifugal regulator,with few little levers inside the pump,and a spring countering the centrifugal force.
__________________
[SIGPIC][/SIGPIC]
Reply With Quote
  #7  
Old 02-16-2015, 02:35 AM
Nidarus Nidarus is offline
Member
 
Join Date: Jun 2014
Location: Sweden, Sundsvall
Vehicle: Volvo 740 "A-Traktor" D24T converted from B230K -87
Posts: 31
Default

yep added fuel. but not much at all, my friend is driving with ALOT more fuel added without the rpm issue so im really scratching my head on this one.

either the pump or my engine have really bad compression...(?).
Reply With Quote
  #8  
Old 02-16-2015, 04:43 AM
michaelovitch michaelovitch is offline
Senior Member
 
Join Date: Jun 2011
Location: France
Vehicle: 245 d24 NA
Posts: 179
Default

Quote:
Originally Posted by Nidarus View Post
yep added fuel. but not much at all, my friend is driving with ALOT more fuel added without the rpm issue so im really scratching my head on this one.

either the pump or my engine have really bad compression...(?).
What is your mileage ?
bad compression would cause bad starts,smoke,low power.
You have a fuel delivery related problem that's sure.
i suggest you to go back to stock fuel quantity and stock injection timing.
You could see if it's working as it should first,then mod it the proper way.
__________________
[SIGPIC][/SIGPIC]
Reply With Quote
  #9  
Old 02-16-2015, 11:03 AM
Nidarus Nidarus is offline
Member
 
Join Date: Jun 2014
Location: Sweden, Sundsvall
Vehicle: Volvo 740 "A-Traktor" D24T converted from B230K -87
Posts: 31
Default

well, its around 0.6-0.7 10 kilometers i guess.

well i have wondering if my pumpaxle seal could be the badguy causing all this...
Reply With Quote
  #10  
Old 02-16-2015, 01:13 PM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,177
Default

That seal can cause the following problems:
1. Hard starting after sitting (allows fuel to drain back to tank and IP to fill with air)
2. Fuel leaking from IP driveshaft when running.
3. Sometimes causes engine to die at idle, difficulty getting it to rev.

Those are not your symptoms, are they?

michaelovitch explanation is more probable, that the max fuel screw has been screwed in. Sometimes this requires backing off the throttle lever one spline in compensation. It is a balancing act.
__________________
1985 744 gle d24t
1985 745 gle d24t
Reply With Quote
Reply

Thread Tools
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 -8. The time now is 10:01 PM.


Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2022, vBulletin Solutions, Inc.