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Old 04-21-2007, 02:22 PM
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Join Date: Sep 2003
Location: France
Posts: 491
spark cable length on a w124 260E 1988

The idle being not good I decided to replace the whole set of sparks cables, but on cruising speed no misfire at all, I would say perfect.
The old cable are the original ones, Bosch make, they are 18 years old.
I bought a complete set. The dealer sold a full set from Beru with the following references.

Copper cable bestel-Nr
1 M107-A 0 300 811 382
2 M107-A 0 300 811 382
3 M107-B 0 300 811 383
4 M107-C 0 300 811 384
5 M107-D 0 300 811 385
6 M107-D 0 300 811 385
7 M106-B 0 300 811 378

Some pairs are of the same length N°1 and N° 2. The new cable for spark N°1 is 10cm longer than the original.
The same length for N° 4 and N°5.

After I put them on the engine the idle is worse than before.
I suspect I have not been sold the correct set of cables.

Can some body help to check if I have been delivered the right cables.

Should they be of different lenght?

Can an incorrect length bring incorrect timing of ignition and therefore bad idling?

In advance many thanks for your help.
__________________
Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8, 180 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km

Son's one: GLK class, 220CDI, 2009, W204

Sold: E-class 260E, 1988, W124, Wonderfull car sold after 489 000 kilometres of reliable services (engine M103, clutch, brake system and 5 speed manual gear box all original).

Sold: E-class, 320CDI, W210, 2000, 225 000km

Last edited by cc260E; 04-21-2007 at 02:30 PM.
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