Motorraum: Heavy starter + limp mode

[Erlingur]

Hello Freunde,

Ich können kaum in Deutsch schreiben deshalb ich hoffe Sie können mich in Englisch helfen

I have en 750 '91
I replaced my starter few months ago, the old one was just kaput.
Shortly after that the starter was extreamly heavy when I was starting, just like the battery was low it was old any way. I replaced the battery but the problem was still there.
It has happened that sometimes when I start the car everything is OK. But not any more. If I use a help from a jump start I can sometimes get the car running, but with some electircal smell and smoke from my NEW starter :(
If I get the car running he usually gets in limp mode shortly after the motor gets started.
There comes no EML light in my dash board and my engine runs very smooth in its limp mode

What can I do?
Could the new starter been kaput?
What is with the limp mode of my engine?

If you have some ideas for me I would be extreamly happy, but maby I have to replace the starter agin, that is not an easy job

Mit freundliche Grusse aus Island,
E

[Erich]

Erlingur,
was that a new starter or a used one? If used, it could also be 'kaputt'. Early motor starters had almost all the inner parts made of plastic, we disassembled my spare starter and that looked like this one
 FIXES - STARTER MOTOR
 FIXES - STARTER MOTOR

You can remanufacture it, you can also use a starter from Bosch for Mercedes Benz if the type is the same, the only difference is the number of teeth on the drive, M70 starter motor has 9 teeth.

the next point to check is the cable from starter, it could look like my cable from the alternator to the B+ pole

 FIXES - ELECTRICAL POWER SYSTEM

[Erlingur]

Hello Erich,

I'll have to check my starter cable.
That could be the reason for what seems to be bad contact/lack of power and electrical smell and smoke :(

The starter is brand new (but an aftermerket type) so I assume that the cable is more likely.

I'm planing to get to this repairs next weekend, so then problably I'll then continue with the limp mode problem.

I have been reading through the limp mode and EML repairs you have posted (can understand some german)
Does the bulp in the dash board have to glow???
If the EML light does not come on shall I fix the dash board first?

MHG
E

[amnat]

Super interesting pictures as usual, by Erich; work on the 750 seems to be a sweaty job, but this is surely not a problem in Iceland.

[Erich]

Zitat von Erlingur

I'll then continue with the limp mode problem.
I have been reading through the limp mode and EML repairs you have posted (can understand some german) Does the bulp in the dash board have to glow???If the EML light does not come on shall I fix the dash board first?
MHG E

It MUST be on for 2-3 seconds when you start the engine and then disappear. If not, limpmode
 EML bulbs


 http://www.7-forum.com/forum/24/eml-...ten-41084.html