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  #1  
Old 11-01-2005, 08:16 AM
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HELP! Hard starting 87 300TD

I need some advice and soon, My 87 300TD has been starting right up , about a month ago when nightly temps were getting low the glow plug lamp stopped working, then it started to have a problem getting started in the morning, Temps were getting 40*F and sometimes in the 30's I started plugging it in and it would start right up, let it sit at work with temps getting mid 60's and it would take so much cranking to get it started even after cycling the relay four times.

I have taken a test lamp to each glow plug ( all were replaced last march ) and they had power to them, looked at the fuseable link in the relay and it was good and had power.

Please where do I go from here? Why did the glow plug lamp stop working if all the glow plugs have power going thru them? Is the relay bad? I can hear it cycle and there is power to it. Why will it not start in the 60* weather after work? when It was before?

I need help before I put another brand new starter in it. THis problem I had last Spring and the shop put in all new glow plugs, and it still had a little dificulty starting but it also was getting warmer out,
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1987 MB 300TD, 245,000 miles running great, converted to WVO.
1996 Ford F350 2WD,PSD,CC,DRW custom conversion, soon to run on WVO.
2003 Toyota Matrix,4WD (wifes)
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  #2  
Old 11-01-2005, 10:02 AM
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87 300d starting problem

I had this experience:
87 300D wouldn't start. Temp was not a factor.
I disconnected the EGR vacuum line, and it started OK. WHY? I don't know. I now have EGR line disconected and plugged.
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  #3  
Old 11-01-2005, 10:06 AM
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One, or more than one glow plug is not functioning. Check all glow plugs via the plug at the relay for resistance. Use an accurate ohmmeter. The plugs should be less than 1.2 ohms. Replace any plugs that are above 1.2 ohms or are open (infinite resistance).

Maybe that shop didn't put in all new glow plugs, or they used some crappy Autolite plugs.

It's a bit of a project to get to those plugs with the manfold in place, but, with a good set of extensions, it can be done.
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  #4  
Old 11-01-2005, 10:07 AM
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You need to measure the resistance of the glow plugs...

If the resistance gets high, the power and heat the combustion chamber sees is greatly reduced.

Since your plugs are new, you should be 0.6-0.7 ohms @70F measured from the glowplug relay harness.


Michael
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83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E
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  #5  
Old 11-01-2005, 11:12 AM
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Quote:
Originally Posted by Brian Carlton
One, or more than one glow plug is not functioning. Check all glow plugs via the plug at the relay for resistance. Use an accurate ohmmeter. The plugs should be less than 1.2 ohms. Replace any plugs that are above 1.2 ohms or are open (infinite resistance).

Maybe that shop didn't put in all new glow plugs, or they used some crappy Autolite plugs.

It's a bit of a project to get to those plugs with the manfold in place, but, with a good set of extensions, it can be done.
They probably are the autolite plugs, what is suggested? for replacement?
I will get my meter out again and check the resistance from the relay.
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1987 MB 300TD, 245,000 miles running great, converted to WVO.
1996 Ford F350 2WD,PSD,CC,DRW custom conversion, soon to run on WVO.
2003 Toyota Matrix,4WD (wifes)
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  #6  
Old 11-01-2005, 11:33 AM
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Quote:
Originally Posted by KansasDiesel
They probably are the autolite plugs, what is suggested? for replacement?
I will get my meter out again and check the resistance from the relay.
How did I know??

Get yourself some Bosch or Beru plugs. They might even last you a few years.

Last edited by Brian Carlton; 11-01-2005 at 05:18 PM.
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  #7  
Old 11-01-2005, 12:38 PM
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Always liked Beru gps...
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83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E
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  #8  
Old 11-01-2005, 03:02 PM
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Quote:
Originally Posted by samiam4
Always liked Beru gps...
Ok I can find Bosch around here but what ar e Beru and were can I price them at?
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1987 MB 300TD, 245,000 miles running great, converted to WVO.
1996 Ford F350 2WD,PSD,CC,DRW custom conversion, soon to run on WVO.
2003 Toyota Matrix,4WD (wifes)
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  #9  
Old 11-01-2005, 04:10 PM
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Bosch are fine too..

I always found them the cheapest at the dealership-
Beru is just another supplier.

Michael
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83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E
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  #10  
Old 11-01-2005, 05:06 PM
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Just replaced mine since its getting cold out. Beru are what came out and they all lit fine when jumped to the battery. I don't know how long they'd been in there. I put Bosch in because that's the only brand I've heard good remarks about. Glad to know Beru is a good brand too.
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1984 300D 225K
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  #11  
Old 11-01-2005, 05:45 PM
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Quote:
Originally Posted by sailor15015
Just replaced mine since its getting cold out. Beru are what came out and they all lit fine when jumped to the battery. I don't know how long they'd been in there. I put Bosch in because that's the only brand I've heard good remarks about. Glad to know Beru is a good brand too.
Beru: http://www.beru.com/english/produkte/gluehkerzen/dreiphasen.php

Someone in the Forum touted Beru as being better than Bosch, I'll use either or but certainly not Champion, the WORST make of sparkplugs or glowplugs.
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  #12  
Old 11-01-2005, 10:16 PM
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Never wanted to use champions as figured they were garbage. Got some free and they have been ok since installed in my vw two years ago. Kind of surprised me. Would never consider buying them normally though. Perhaps depending on type of plug they use different suppling manufactures?
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  #13  
Old 11-01-2005, 10:47 PM
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wvo?

are you sure you are running all of the wvo out of your fuel lines and filter? if not, this could contribute to a hard start.
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  #14  
Old 11-02-2005, 08:27 AM
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Quote:
Originally Posted by nckmsn
are you sure you are running all of the wvo out of your fuel lines and filter? if not, this could contribute to a hard start.
Oh yes, I been running WVO for a year now, over 13000 mile, I do have the purge thing down.

Actually I got to check the GP's as stated in this post, found 4 GP's with very high resistence and 2 normal. Needless to say they are autolites and they didn't last but 7 months, I have a set of Bosch that will be here today.

Thanks Guys
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1987 MB 300TD, 245,000 miles running great, converted to WVO.
1996 Ford F350 2WD,PSD,CC,DRW custom conversion, soon to run on WVO.
2003 Toyota Matrix,4WD (wifes)
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  #15  
Old 11-02-2005, 03:30 PM
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Save yourself the headache and pull the manifold to change them. I tried to change them on my '87 w/o pulling the manifold and I broke 2 universal joints. Nearly impossible plus you can strip the threads in the head when trying to thread the GP's back in. Pulling the manifolds actually will save you time and end up only costing about $25 more for the needed gaskets.
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