Loss of power...briefly - Page 7 - PeachParts Mercedes-Benz Forum

boneheaddoctor · #91 11-03-2004, 07:25 PM

Quote:

Originally Posted by ricali

Thanks to your posts mine is cured. New lift pump and new lines. The pump would just loss pressure and the lines were worn. GOOD LUCK with yours

Thats why I keep it as descriptive as possible so if anyone else goes through this and recognises any of the symptoms they know the hotspots to check...............Going to take it out later, funny turbo is spooling louder now.............I used the other short rubber hose with clamps that was still hanging on the overload/overboost thingy to hook the broken end of line to the ALDA..

I think mine had multiple issues and all the stars aligned at once and threw me for a loop with at least several things going bad in degrees of severity all at once. Or at least agrivated the nest marginal thing. After dinner I take it out to see. And keeping my fingers crossed.

Brian Carlton · #92 11-03-2004, 07:28 PM

Quote:

Originally Posted by boneheaddoctor

After dinner I take it out to see. And keeping my fingers crossed.

So are we.

boneheaddoctor · #93 11-03-2004, 09:14 PM

Well its still doing it, but to be honest I was expecting that. I was certain I broke off the Alda line yesterday clean and that I hadn't damaged it sometime in the last week before I knocked it off yesterday. Wifes been a royal PITA tonight so I was too ticked off to do the 1 gallon tank thing. I still haven't acquired pressure guage/guages to check both boost and fuel pressure. Maybe I can find something tomorrow.

Tirebiter · #94 11-03-2004, 09:55 PM

My money was on the tank strainer too.

All mechanics know the frustration of chasing a nasty and elusive problem. You will win. I hope it's not the MFI pump. Kinda pricey.

boneheaddoctor · #95 11-04-2004, 02:41 PM

Quote:

Originally Posted by Tirebiter

My money was on the tank strainer too.

All mechanics know the frustration of chasing a nasty and elusive problem. You will win. I hope it's not the MFI pump. Kinda pricey.

Tell me about it.....motor has only 117,000 miles.........don't want a pump with 400,000 on it.

Adsitco has a fair price on a rebuilt one but even that is pricey.

Now if only the rain will stop so I can try the 1 gallon tank under the hood trick.

boneheaddoctor · #96 11-05-2004, 08:25 AM

OK, had a guy buy a motor from me last night, tried to move the car so we could push it on a furniture dolly to the street (the motor). Damn Mercedes wouldn't start. Then I got called to go to a customers office and diidn't get home till 2am......will try more tonight. Got to find my DVM to see if glow plugs are getting juice. This thing always fires quick, and just got colder and now nothing, almost nothing till a LOT of cranking. Never had time to look closer or do more and never found gauages yet to check fule pressure off the Lift pump. Now if that was a $29 part like my 6.2 in my truck I would replace it instead of going through the agrivating work to test it. Buts its way costly to swap on a whim.

boneheaddoctor · #97 11-07-2004, 08:44 PM

OK, found the reason I couldn't get it to start that night.........Guess the bolt for the secondary filter was just loose enough it lost prime parked on the hill facing uphill. Got it running today when I went out with the light and looked at it and saw air in the line. I figure I had better replace ALL the copper crush washers. Phill sent me only 1/2 of what I needed to install the lines and I reused some. Of course it was yesterday I remembered if I had hit them with a propane torch it would soften work hardened copper. If I can't find new ones I will do that with the old ones. That way I can be positive they are sealing properly under load I am not getting air leaks and have been chasing my tail since I replaced those lines.

Today I put in my block heater. That was fun.....

I chose to do it from above as I have no access to a lift. So I pulled the Turbo and manifolds and did it from above and replaced all the gaskets with new ones I got on Ebay a few weeks ago. No crud in the intake........

Turbo is in nice shape. Tomorrow I do the Citric acid flush and replace antifreeze for winter.

And try the crush washers. Bought a USED ip pump assy on ebay which has a lift pump, Just hope for the sake of a swap these are somwhat interchangible between the turbo models.

If the crush washers make no difference then I will do the 1 gallon under hood tank while I wait for my IP to arrive.

Brian Carlton · #98 11-07-2004, 09:27 PM

Quote:

Originally Posted by boneheaddoctor

Today I put in my block heater. That was fun.....

I chose to do it from above as I have no access to a lift. So I pulled the Turbo and manifolds and did it from above and replaced all the gaskets with new ones I got on Ebay a few weeks ago.

Wow, that is sure a lot of work just to get the block heater in. Although, I do understand how difficult it is to work on your back, on a dirt driveway, underneath the engine block.

Quote:

Originally Posted by boneheaddoctor

Tomorrow I do the Citric acid flush and replace antifreeze for winter.

I recently did the citric acid flush on the SDL and can recommend the following:

1) Flush the system.

1) Add the citric acid and drive the vehicle about six hours (I did this over a one week period)

2) Flush the system. It is important to note that the flush water was green to a certain degree. Clearly the flush does not get all the fluid to change over.

3) Instead of filling with new antifreeze, close it up and drive it for 15 minutes or so.

4) Allow to cool for 30 minutes and flush again.

5) Drain.

6) Fill with antifreeze and water.

I failed to do steps 3 and 4, and, I'll bet that some of the citric acid is still in there.

boneheaddoctor · #99 11-07-2004, 09:45 PM

You better hope you got all the citric acid out........I have heard that can do slow damage to thin metal parts over time. (heater core, radiator)

Well I had a 19MM regular allen wrench, not a socket. So I had to remove an exhaust stud to get the swing I needed, Used the handle from my floor jack. I would not have been able to do it from under the car, Could not have gotten it high enough and safe enough to use the force I did to get it out. I got a deal on the gasket set on Ebay. 20some dollars if I remember. In my situation it was most reasonible to go it from above. I have prestone flush stuff in it now, ran it for 45 minutes at idle and 30 on the highway, Under 60mph of course due to still existing problem. Tomorrow when I get home from work I will flush it as well as I can and put in the propper concentration of Citric acid.. I bought a 10 lb lot on ebay recently for far less than MB charges for 1 kilo of theirs.

OH, guess what I paid for my NEW block heater?

$10.49 + $5.85 shipping USPS. On ebay..........eat your hearts out guys.

boneheaddoctor · #**100** 11-10-2004, 08:37 AM

Tonight I replace all the copper crush washers............Its been a bear to start recently because it appears some are leaking enough to let air in overnight, just enough for pump to lose prime.. At idel and reving I see no air in lines however, under load for extended periods???????well can't see it when I am driving. The used IP assy is due for delivery today. Will do the Lift pump first. Before I commit on the IP....thats a job I am not looking for. Hope it doesn't come to it. Spent the day yesterday flushing cooling system with citric acid etc......because it was scheduled to hit 26 last night and did. Didn't want it freezing since it sits outside.

boneheaddoctor · #**101** 11-10-2004, 10:33 PM

OK, this bites.........couldn't find the crush washers at the local parts emporium. But good news, my used Injector pump showed up today and it does have a lift pump on it, in fact it is complete up to and including all the injector lines, including all attached accessories.. So now I have a lift pump if I need it AND an IP if I need it. Tomorrow I stop by the steelership and if they have washers I by them, if not I aneal them with a propane torch. Will have even my toes crossed. Boy I want this problem to be fixed. Its now officialy cold here and I hate working in the cold.

boneheaddoctor · #**102** 11-11-2004, 10:22 PM

OK, update here,

Replaced the crush washers, replaced the Lift pump with the one from the replacement I got yesterday. And the damned thing is STILL doing it (in about 5 miles @ 65, or 10 miles @60).

I am bent out of shape now. :wtf:

Need to research IP replacement now, and find a local shop to check it out after I take it out, and or the replacement. But first I may run a can of Diesel purge through it I mean it can't hurt. And will recheck the valves once more to make sure nothing changed since I adjusted them. Before I take the leap and Pull an IP.

If anyone has a brainstorm please fill me in.

Brian Carlton · #**103** 11-11-2004, 10:55 PM

Quote:

Originally Posted by boneheaddoctor

OK, update here,

If anyone has a brainstorm please fill me in.

Time to relax and take a step back. You already knew based upon your previous observations that the lift pump was not the likely candidate.

It is also not likely that the IP is the culprit because the IP is not likely to be OK for 10 miles and then go into problem mode after this point.

You had agreed to do the simplest of tests to rule out all the hard lines by putting a 1 gallon can under the hood and running it directly to the lift pump.

I would really like to see the results of this test.

boneheaddoctor · #**104** 11-11-2004, 11:02 PM

Quote:

Originally Posted by Brian Carlton

Time to relax and take a step back. You already knew based upon your previous observations that the lift pump was not the likely candidate.

It is also not likely that the IP is the culprit because the IP is not likely to be OK for 10 miles and then go into problem mode after this point.

You had agreed to do the simplest of tests to rule out all the hard lines by putting a 1 gallon can under the hood and running it directly to the lift pump.

I would really like to see the results of this test.

True.....I got frustrated and forgot that one. I can do that tomorrow.

boneheaddoctor · #**105** 11-12-2004, 02:10 PM

OK, guys I have a plan of attack for saturday. Its raining cats and dogs here today.

I will try the I gallon can under the hood, I am going to splice an old mechanical oil pressure guage into the Alda line to see if I have having a boost dump at a temprature theshold.

If I have no boost dump I will feed the IP directly from the I gallon can in case my fuel filter braket has a microcrack. I will then take and Pull the IP to check for a sheared woodruf key as per a conversation with WHunter. As long as the weather cooperates I will try all of this over he weekend. Garage is full of everything but car. and can't get it inside to work there.