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Forum: Vintage Mercedes Forum

11-15-2008, 11:42 PM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

<<The idea with the clear tube is also...

<<The idea with the clear tube is also excellent.>

Yes.
If you look at the Factory Sevice books on these MFI systems, you will notice that the gauge they recommend/use for pressure and flow...

Forum: Vintage Mercedes Forum

11-15-2008, 11:35 PM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

<Another thing that's untested is the injector...

<Another thing that's untested is the injector spray pattern at idle.>

Correct ...that is why it is so important not to have any air in the fuel feed line to the pump............

Forum: Vintage Mercedes Forum

11-15-2008, 10:49 PM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

I would guess it's fuel/air related rather then...

I would guess it's fuel/air related rather then cam/valve timing ..
I have seen many CSV that do seep ever so slightly and that would only be noticed at a low rpm/idle condition..it upsets the a/f...

Forum: Vintage Mercedes Forum

11-15-2008, 09:56 PM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

<<the idle that still goes up and down just...

<<the idle that still goes up and down just slightly>>

Couple of things to check would be the CSV ...make sure it is not leaking fuel while at idle...
..and put a timing light on the crank and...

Forum: Vintage Mercedes Forum

11-15-2008, 11:12 AM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

That's up to you...I would not worry about...

That's up to you...I would not worry about it...........

Forum: Vintage Mercedes Forum

11-14-2008, 11:20 PM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

You do not check valve timing by seeing how far...

You do not check valve timing by seeing how far left/right the cam tower index marks are....you turn the engine over by hand at the crank [ in normal rotation direction, of course] until the cam...

Forum: Vintage Mercedes Forum

11-14-2008, 10:31 PM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

<The hot starting is still not good, but I'm...

<The hot starting is still not good, but I'm going to drive it for a few days and see if it goes away. This injection pump does have the 2 wire solendoid, and not hot start kit (but I've seen those...

Forum: Vintage Mercedes Forum

11-14-2008, 09:23 AM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

Well..I can see you have a good understanding of...

Well..I can see you have a good understanding of these MFI systems .

That being the case, here are a few more finer points I can mention:

When you redo the valves next time, retorque the...

Forum: Vintage Mercedes Forum

11-13-2008, 10:51 PM

Replies: 25

250se won't do more than idle

Views: 3,696

Posted By Arthur Dalton

That chassis uses vac retard, not vac advance. ...

That chassis uses vac retard, not vac advance.
So, you set the 30 BTDC @ 3 K FIRST and then if you want to set the idle timing , you change that timing by the adjustable rod on the dist vac. servo...

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