Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #31  
Old 10-09-2013, 04:01 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,350
This guy claims a bad throttle position sensor can cause a no-start condition. Anyone ever hear of that?

Trouble Shooting Challenge NO Start Mechanical Injection - Diesel Place : Chevrolet and GMC Diesel Truck Forums

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #32  
Old 10-09-2013, 04:16 PM
eatont9999's Avatar
Registered User
 
Join Date: Jan 2012
Location: Dallas, TX
Posts: 1,953
Quote:
Originally Posted by kerry View Post
This guy claims a bad throttle position sensor can cause a no-start condition. Anyone ever hear of that?

Trouble Shooting Challenge NO Start Mechanical Injection - Diesel Place : Chevrolet and GMC Diesel Truck Forums

Uh, I don't think so...
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #33  
Old 10-09-2013, 04:18 PM
eatont9999's Avatar
Registered User
 
Join Date: Jan 2012
Location: Dallas, TX
Posts: 1,953
Thinner fuel will seep past seals easier than thicker fuel. Perhaps the winter blend is just thin enough to seep too much. You could add some new engine oil or ATF and see if that helps thicken the fuel enough. You have dead-on symptoms of a worn IP, though.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #34  
Old 10-09-2013, 04:22 PM
eatont9999's Avatar
Registered User
 
Join Date: Jan 2012
Location: Dallas, TX
Posts: 1,953
Chevy GMC DB2 Mechanical Injection Pumps
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #35  
Old 10-14-2013, 12:07 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,350
Here's an update on the situation. I replaced the starter and the problem appears to have gone away. I replaced the starter because the last time I tried to start it hot it groaned, barely turned the engine over but the batteries load tested fine. The new starter definitely spins the engine faster. I've tried warmly the engine up, letting it heat soak for 15 minutes and restarted it. It's started up right away each of the 5 times I tried it. I haven't taken it on a hard hot drive yet to test it but it appears the problem may have been the starter all along. I couldn't notice any difference in starting rpm's hot or cold on the old starter. I can't account for the fact that it fired up with the old starter after putting cold water on the IP. That worked 3 times. But if this new starter has indeed solved the problem it points to the fact that perhaps water on the IP is not definitive proof of a worn out IP.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #36  
Old 10-14-2013, 12:11 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,835
Hmm

so when you said "harder to start" you meant the motor didn't turn as fast when hot?
I assumed the crank speed was unaffected by the motor temp, but the motor would not fire.

replacing the battery/starter harness with welding cable and tinned crimped ends is a standard upgrade to these motors (as is replacing the oil cooler line fittings!!!) you changing the starter, which required disconnecting the batteries, could have cleaned up the connections enough to eliminate the problem too...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #37  
Old 10-14-2013, 12:49 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,350
No, the engine turned at the same speed hot or cold (until the last two attempts prior to starter replacement). At least I could not detect by ear any difference in the cranking speed. It just didn't fire. It did fire after I poured the water on the IP.
Except for the connections to the solenoid, all battery connections had been cleaned a week prior when I replaced the batteries. I had noticed a slightly slower starter speed on a cold morning and the batteries were 7 yrs old.

So it's a mystery to me as to how a new starter solved the problem when the water on the IP had got it to fire.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #38  
Old 10-14-2013, 12:56 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,835
well... it's slightly cooler outside now than it was when you started this thread... perhaps the IP is just REALLY sensitive to fuel temp?
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #39  
Old 10-14-2013, 01:58 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,350
Perhaps. It is about 15 degrees cooler today but Sunday it was just about the same temperature it was when it was not starting last Monday.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #40  
Old 10-24-2013, 10:37 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 51,038
Interesting! Glad I came back to take a look at this thread.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #41  
Old 10-25-2013, 08:56 AM
Registered User
 
Join Date: Oct 2013
Location: Cavalier, ND
Posts: 16
If water being poured on the IP made it start then there is a 90% chance it is a worn IP, (average service life is said to be around 100k for these pumps as well). It is sort of a universal sign in db2 whether it is ford gm or whatever.

Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 02:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page