Mercedes-Benz Forum banner

1 - 9 of 9 Posts

·
Registered
97 E300D W210
Joined
·
5 Posts
Discussion Starter #1
97 E300D intermitantly looses power on gradual turn to left under normal acceleration. Will also do it from stop primarily prior to shifting into 2nd gear.

No codes per my Benz mechanic. Recently had most fuel lines and glow plugs changed. Experienced mechanics are baffled.

The power loss is jerky and will cease after the curve.

Has anyone heard of this?

Perplexed.
 

·
Registered
2001 SLK 320(217K Miles), 2002 E320 Special Edition(183K Miles)
Joined
·
3,466 Posts
Does the fuel tank level make any difference in the severity?
 

·
Registered
97 E300D W210
Joined
·
5 Posts
Discussion Starter #4
UPDATE:

I ran the tank down to fumes and the car responded better. Filled it full and it is much much worse.

I can go around a left hand curve under load (3500 RPM in 3rd gear) with no problems.
Make the same curve in 4th gear at 2,200 RPM and she'll hesitate like there's air in the fuel lines.

No problems at either speed on the same curve to the right

?????
 

·
Registered
W210.265/2001, W220/S500/2000, Porsche 997 C2S/2006, GMC K1500/1992
Joined
·
2,157 Posts
You may have high resistance at your power pump when you make the left turn. I will check the suspension system components. When you do not experience that in high speed because the momentum of your car can over run the resistance during the left turn. That resistance will transfer into friction to your power steering pump and into more power need from the belt and into friction to the same belt running your engine. Check your left engine mount too. May be it is so bad the left turn will drop your engine too low for good operation.
 

·
Registered
97 E300D W210
Joined
·
5 Posts
Discussion Starter #6
Is this something you have seen before? Since the power steering pump is bolted to the motor and they move in concert with each other, are you suggesting a bad pulley?
The motor mount and pump appear to be operating properly.

Any other ideas?
 

·
Registered
210.065
Joined
·
2,947 Posts
I haven't seen it before. How long you haven't change the fuel lines? Could it be fuel line leaking only on left turn due to momentum, etc. Loose fuel line connection? If the lines are due anyway, I would change it and see how first, as Kajtek1 suggested it is not a difficult DIY, and you sound experienced.
 

·
Registered
97 E300D W210
Joined
·
5 Posts
Discussion Starter #8
The lines have recently been changed

Originally, I had leaking fuel lines. I had them changed at a reputable shop who regularily works on the car. (Benz and european specialists) At first they changed only the lines in and around the injection system but it still was getting air bubbles in the fuel lines. So they later changed another line which stopped the air problem. This hesitation issue started after the lines were changed. The shop has rechecked their work and feel everthing is working as it should. We tried changing out the K40 relay module but it did not fix the problem. [This was tried due to their manipulation of the wires appearing to have some effect in the repair bay.]

Problem only occurs on a left hand curve and sometimes at low speed when starting from stop prior to shifting into 2nd gear.
 

·
Registered
210.065
Joined
·
2,947 Posts
I still think it could be the fuel line, especially you said your indi did not change them all initially...... If you pm Kajtek1, he will guide you how to inspect ALL the lines, at least 6-7 of them.
 
1 - 9 of 9 Posts
Top