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Eric, Automotive Repair Shop Manager
Category: Mercedes
Satisfied Customers: 29973
Experience:  20+ yrs. experience as repair shop manager and technician.
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OK, I poured down the Sea Foam down the intake, runs better,

Customer Question

OK, I poured down the Sea Foam down the intake, runs better, but upon higher acceleration it will backfire thru the intake. I did find out that the previous owner jockeyed with the timing w/o using a timing light. I have a timing light and could check
it but the battery is in the trunk. Where do you hook up?
Submitted: 12 months ago.
Category: Mercedes
Expert:  Eric replied 12 months ago.


I use a jump box and hook the timing light to it. you could also hook it to a battery charger for the 12v needed to operate it.

Customer: replied 12 months ago.
I don't have a charger....
Customer: replied 12 months ago.
Is there hot wiring at the alternator if it's easy to get to..
Expert:  Eric replied 12 months ago.


There is but not sure it I have the wiring diagram to tell you which one, but let me check. If you have a voltmeter, you can check for the wire with 13.5v to 14.7v on it and that goes up and down slightly if you rev the engine. That will be the hot wire going from the alternator to the battery. I will check to see if I have the wiring diagram of it though

Customer: replied 12 months ago.
Good morning! Did you find the wiring diagram?
Expert:  Eric replied 12 months ago.


I have gone thru all my sources and do not have one for it

Customer: replied 12 months ago.
Do you know where the alternator sits in the engine bay?
Expert:  Eric replied 12 months ago.


upper passenger side at front of engine(see attached)

Customer: replied 12 months ago.
I'll try it over the weekend
Expert:  Eric replied 12 months ago.


Ok, sounds good

Customer: replied 11 months ago.
OK, got the timing right on, but there is still a problem with keeping the car it's starving for fuel. It will not sustain a steady rate of RPM's for any amount of time....unless you pour gas down the intake port.
Expert:  Eric replied 11 months ago.


Ok, I am out of ideas on this one and will opt out and open it back to other experts to see if they know

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