Question about 1997 Mercedes-Benz C-Class

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I have misfire on 4 and 6 cylinder, when i first start car runs great, after a couple minutes its terrible, misses like crazy and backfires a little, what should i start looking at to fix this problem.......

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Hi! Most likely is your connections. check your spark plug and their coil, you might have something loose or a weak spark plug. also check your fuel line system or your fuel filter you may not have enaugh gas flow going in to your gas line. You can also get it scan for obd diagnose code to make sure what is the real rpoblem. You may take to any auto parts or autozone and they can scan it for you, for free... best of luck

Ginskie...

Posted on Sep 27, 2010

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Posted on Jan 02, 2017

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I have A 2007 Saturn Ion--The #4 cylinder is showing miss-fire & low pressure--could this be false reading--I'm getting same gas mileage & runs fine


A misfire could be a sign of a problem coming up. You might not notice anything major until the cylinder stops working all together. However, other that it sounding terrible, and a loss of power and some shaking effects, it's not terrible.
In other words, if it happens, it's time to get it to a shop now, instead of later.
Yet, it all depends on why it's misfiring. If there is coolant leaking into the engine cylinder, it's a much larger problem. I would suggest taking it to another shop for a second opinion. Sometimes it's just a simple fix.

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Backfiring and missing


possible couple of things
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overheating component in the ignition system--coil failing when hot
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May 26, 2017 | Cars & Trucks

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Misfire on number one cylinder sometimes runs fine


Hello David I assume.
Was wondering if that is an engine code you are reading ? Aswell did this issue just randomly start ?

Oct 12, 2013 | Cars & Trucks

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My Nissan yesterday started idling terribly and when I was driving it was shaking and vibrating so bad it felt like I was driving with square tires.


I doubt the EVAP problem is causing the rough running. The knock sensor code means the knock sensor noted a severe vibration. The cylinder 4 code could mean the miss has become bad enough to trigger a code for one cylinder.
I would look at the injectors and for a vac leak. And the spark plugs can be firing in air but not inside the cylinders under pressure.

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My 1996 tahoe is giving me cylinder 2 misfire And runs ruff idle


For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

Thanks.

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1 Answer

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check compression,with engine running remove h/t leads 1 at a time to diagnose weak cylinder,check that cylinder has the same amount of spark ( jumps the same gap as others )try changing the plug from crook cylinder to a good one and note if miss follows that spark plug or stays with same cylinder,can do same with injectors but only perform one procedure at a time so you can determine which one works.

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1 Answer

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You should get the codes checked and start from there. My Kia Sportage was also backfiring and running rough, after checking the codes. It had misfires on two cylinders. I did a tune up and had to replace one of the ignition coils. Now it runs great!

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