300D No start, only with gas held to floor, no power - Page 3 - PeachParts Mercedes-Benz Forum

moon161 · #31 08-15-2019, 09:30 AM

In context, good for a laugh [Kent recommends burn a gallon of VO and then (of course) run a diesel purge]:
https://www.youtube.com/watch?v=cyXz7KaXfao

phillyilly · #32 08-24-2019, 06:37 PM

Since the last post:

I double checked timing of timing chain. It's dead on. Mark with Cam aligns to zero on crank.

No timing chain stretch.

I double checked injection pump timing. It's perfect. 15 ATDC on the sight port.

The injectors were just pop tested. They all checked at 1840 and I adjusted to 1960.

Spray pattern is good. They're new monarchs and it's quieted the engine down.

The two main problems are smoke, including on idle.

Also the idle screw had to be turned all the way in to idle the car.

I already replaced the fuel filters and verified good flow from tank.

Tomorrow I'll verify that my valve adjustment was good and double check compression, if it comes down to that.

Any thought on smoke and having idle screw turned all the way in?

97 SL320 · #33 08-24-2019, 08:09 PM

Quote:

Originally Posted by phillyilly

Since the last post:
The two main problems are smoke, including on idle.

Also the idle screw had to be turned all the way in to idle the car.

This motor has the emergency shut off throttle blade in the intake correct? I'm thinking the flap is staying partly shut.

Have you checked the entire air inlet system for major restrictions?

Have you made sure the pump shut off system isn't staying partly engaged?

phillyilly · #34 08-25-2019, 05:30 PM

Quote:

Originally Posted by 97 SL320

This motor has the emergency shut off throttle blade in the intake correct? I'm thinking the flap is staying partly shut.

Have you checked the entire air inlet system for major restrictions?

Have you made sure the pump shut off system isn't staying partly engaged?

I checked for an emergency shut off on the throttle. There is none.

The air inlet doesn't have any air restrictions

The Injection Pump rack was checked under the ALDA. It moves freely and the vacuum shut off valve isn't stuck.

I ran the car directly off a clean bottle of diesel, to double check the rear tank filter. The car ran the same. Smokey.

The only two other thoughts are to check the valve adjustment and double check compression.

The compression was fine, prior to taking off head and still ran smokey.

The car also takes about 10-15 seconds to start with throttle held down to start. Almost as if it lost its prime.

Alec300SD · #35 08-25-2019, 08:06 PM

Quote:

Originally Posted by phillyilly

Alright, injection pump is installed. I took alot of time researching timing and decided to go to with the 15 ATDC method. The slot in view port was perfectly centered. I placed crankshaft at 15 ATDC and lined up Pump, with slot/view port held in place. I used a mirror to ensure slot was centered.

For some reason, after many attempts I can only seem to get the pump to time in at 10 ATDC or 20 ATDC. I ran the car at 10 ATDC and it didn't want to idle very well. At 20 ATDC it runs much better and I will post a video tomorrow.

The problem is that I can't seem to acheive 15 ATDC. Maybe I'm missing something. Does the coupling (between pump and gear) have to be adjusted to allow a 5 degree decrease in timing?

Otherwise, the video will show some idling up and down at lower RPM's and the engine seems to smoke a little at idle, and more at higher RPM. I know the Injectors still have to be pop tested. Could anything be causing idling issue, or smoking from exhaust?

I don't want to adjust idle screw too much.

While taking a test drive, the car didn't want to shift to next gear easily (automatic) and I had to let off pedal to get it to shift. Which is an indication of transmission downshift not adjusted properly. I know the car shifted fine, prior to pump change and don't want to adjust downshift cable if another problem may exist.

Maybe the replacement IP was installed out of phase.
Surprisingly these engines can run, albeit poorly, when the IP is timed to the wrong compression event (exhaust instead of intake).

barry12345 · #36 08-26-2019, 11:45 AM

Probably worth a quick check because of the long delay in startup. Plus the smoking.

With the tang in the injection pump visable. The cam lobes of the first cylinder must be pointing generally upward.

You would be far from the first person to have the injection pump timed on the wrong stroke of the cycles.

Why did I suspect this? You had the head off.

phillyilly · #37 08-26-2019, 02:01 PM

Injection pump was out of phase.

I didn't think the car would even run, with it being so far out of time.

It runs much better now, minimal smoke and engine sounds like it has a slight miss. I'll have to look into that at another time.

For the time being, I need to Troubleshoot the transmission shifting/vacuum and engine shutoff with vacuum.

Thanks for all your help

barry12345 · #38 08-26-2019, 04:15 PM

It is a pretty long shot. There is a very remote possibility that the injection pump was also installed wrong when the car used alternative fuels. My belief is that the symptoms of that just might be less severe with alternative fuels. I do not remember a case of that ever being posted.

Members have even purchased these cars with the problem of the injection pump timed on the wrong stroke.

The term is right but the word phase might be confusing to some members. We pretty much made the wrong stroke the term most commonly used.

97 SL320 · #39 08-26-2019, 05:34 PM

When you put the cylinder head back on, did you verify the TDC pointer was actually correct for # 1 piston all the way up and the cam timing was correct?