Power on Hills
 

Since the end of last summer, I have noticed that my 1984 300SD running on SVO has lost power on Hills. I now have to go in the truck lane on hills. I have not seen a great loss in acceleration off the line, but that was never great. I do not see much of a difference between running on SVO or standard diesel. Standard Diesel seems to give me marginally better performance. Gleaning though the threads I have seen a number of suggestions:

I have already done the following:
1. Replace Fuel Filters
2. Replace Fuel Lines
3. Replaced Filter screen in Original Main tank.

I still have the problem. I am looking to try the following:

1. Clean Banjo fitting
2. Run a diesel purge
3. Adjust ALDA - from the other discussions this may not be related to Power on hill progblems.
4. Adjust valves.
5. Adjust timing chain.

Any other suggestions.

Replace air filter.

The two thing that I did that you did not cover that had a major positive impact was replace the injectors, I used rebuilts, and I had my tech set the injector pump timing.

Understand, I have a non-turbo model. The before photo had me slowing down to about 45 mph up long steep hills. Now, on the same hills I only slow down to 55-60 mph.

JCD

I would suggest...
1. Clean Banjo fitting.
2. Check boost line to ALDA (and fittings) for leaks.]
3. Check/adjust valves.
4. Adjust timing chain. Actually, check and adjust Injector Pump timing...
5. Run a diesel purge.

If the ALDA is properly adjusted you will get more fuel as boost increases, on level ground or hills.

Best Regards,
Jim

Thanks for your input. I will also see about checking the timing chain. I did change the air filter, and saw some improvement, but nothing to write home about. I will look into replacing the injectors if the other adjustments do not work out. Thanks again.

A N/A engine in an 84 300SD W126? was it swapped in?

I am confused. Is this a reply to this thread. What is an "N/A" engine? :confused:

N/A engine means "Naturally Aspirated"...as in it doesn't have a turbo. But I would think that yours does have a turbo, unless someone put a non-turbo engine in that car....in which case it'd be pretty slooow.

I screwed the whole thread up when I replied to the post #3 hijack. BHD then responded to me. I have since deleted my original post, and I might just delete this one, as well.

Yours does have a turbo so it is not n/a.

The post #3 is n/a.

One thing I would check is coking of the nozzles or buildup. A byproduct I heard from any residual animal fats left in the wvo. Makes sense if you think of it at nozzle end temperatures when operating. You have five little barbeques in action and burnt fat occuring. The good is it should be easy to clean them up from time to time. Maybe as simple as removing and soaking in a chemical bath. The wvo guys should know about this if true. Not sure if diesel purge is the right chemical for burnt on animal fats but do not really know. Let us know when you have your power back and how you did it. looking to change one of my cars over at some point as well. :)

Thanks for all your help.

I already cleaned the banjo fitting, and I saw a major improvement. I will move on to check the next items on my list.

Hey,
cleaning the injectors is on my to do list but I noticed an improvement when I installed a woodruff key.
I determined about 4 1/2 to 5 deg stretch.
I added a woodruff key part #621 991 04 67 for correction of 4 deg at crank.
I was supprised at how much of a difference this made. I would do this before messing with injector pump timing.

Danny