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Petrol_Pete, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 7568
Experience:  ASE certified
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I changed the spark plugs on my 04 C240 and after doing so

Customer Question

Hello , I changed the spark plugs on my 04 C240 and after doing so the car had no power. I checked for spark at each plug, witch it had. then i replaced the plugs with a new set.
JA: Is the power loss consistent, or does it fluctuate?
Customer: it won"t rev over 4500 rpm and it's slow getting there
JA: Are you fixing your C240 yourself? What have you tried so far?
Customer: I've installed a power steering rack on it . but this is my first tune up
JA: Anything else you want the mechanic to know before I connect you?
Customer: no other than I was wondering if it could be the wires, nothing else was disturbed
Submitted: 1 month ago.
Category: Mercedes
Expert:  Petrol_Pete replied 1 month ago.

Hi, I am Mike, welcome. I'm reviewing your question. Can you tell me the year, make, model, engine.

Expert:  Petrol_Pete replied 1 month ago.

Did you check the gap on the spark plugs before installing them? If so, did you by any chance get 2 spark plug wires put back on, on the wrong cylinders/crossed?

Expert:  Petrol_Pete replied 1 month ago.

This diagram may help to determine which spark plug wire goes where by looking at the color wires on each coil on plug.

Expert:  Petrol_Pete replied 1 month ago.

Did that answer your question? If so, kindly leave me a positive rating, so I get credit. After all, you have already made the deposit.
If you don't, the deposit you made will just sit there and I won't get my share of it.