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Registered 2000 SLK230
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Discussion Starter #1
I need help. My 2000 SLK 230 isn't firing on all cylinders. According to the ODB II, it is occassionally missing on cylinder 1 and 4. When I start the car, it shacks from not firing on all cylinders. If I turn the key off, then back on (and let the fuel pump charge the system) is usually runs smooth. Sometimes, I have to do several starts to get the engine to run smooth. I think I have either a fuel pressure problem or a fuel cap needing replaced.

Please help! What can I try to resolve the problem.

Thanks

Pat
Destin, FL
 

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I need help. My 2000 SLK 230 isn't firing on all cylinders. According to the ODB II, it is occassionally missing on cylinder 1 and 4.
Destin, FL
Does your scanner show any codes for the fuel pump? It might be faulty and thus not sending the fuel under the required pressure.
 

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Registered 2000 SLK230
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34 Posts
Discussion Starter #3
Hey,

I get P0130 (O2 sensor), P0135 (sensor heater circuit, 0301 (misfire #1), P0304 (misfire #4), P0300 (multiple misfires) .

I just installed new Bosch O2Sensors.

It misfired on the way to work but ran great at lunch and on the way home.

What do you think?

Pat
 
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