Error Codes Discovered, What To Do Now ???
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Super Member
Joined: Feb 2007
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From: Downtown Columbus
w211 e500
Error Codes Discovered, What To Do Now ???
Okay, so i finally got my hands on a obd2 reader and this was the outcome.
error: p0302 - Cylinder misfire.
Please advise what steps to take next, would these just be my spark plugs, because if it was the coil packs, the car wouldnt start right ??? Merc gods PLEASE HELP ASAP,
I have been ridin my bike for a week and rain is coming !!!!
error: p0302 - Cylinder misfire.
Please advise what steps to take next, would these just be my spark plugs, because if it was the coil packs, the car wouldnt start right ??? Merc gods PLEASE HELP ASAP,
I have been ridin my bike for a week and rain is coming !!!!
Last edited by outaurleague; May 15, 2007 at 09:59 AM.
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From: vancouver canada
2001 c240, 65 MG Midget...5.0L V8
not much to it, remove air filter box/ cover by unclipping the front part (that covers the front part of the engine, oil filetr housing...) and then oulling the whole assembly up and forward.
do one spark plug at a time so you don't get the wires crossed.
you need a spark plug remover (just a socket with a piece of rubber stuck inside it) , unclip the ignition wire
remove the spark plug, install the new one , torque to about 25 inch pound (tighten it and then give it about an extra 1/4 turn) , put the wire back on, make sure it clips into place
move on to the next one..
do one spark plug at a time so you don't get the wires crossed.
you need a spark plug remover (just a socket with a piece of rubber stuck inside it) , unclip the ignition wire
remove the spark plug, install the new one , torque to about 25 inch pound (tighten it and then give it about an extra 1/4 turn) , put the wire back on, make sure it clips into place
move on to the next one..
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Joined: Nov 2001
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From: Huntington Beach, Ca.
'17 Jaguar XF
Cylinder 2 misfire...Does the same code show up every time after you've cleared it? If so....1. Check both primary wires going to that cylinder at both ends to see if they're seated correctly. 2. Check the primary wires for continuity (it's not 0 ohms, but they both should be the same) 3. Look at the plugs in that cylinder 4. Swap coil pack with another to see if the misfire follows the coil pack. Change it if it does.
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
"4. Swap coil pack with another to see if the misfire follows the coil pack. Change it if it does."
I would do this first.
Yes, clear the error, swap the coil pack, if the problem move the cylibder you moved it to, than that coil pack is bad.
Order one online, ON ship for about 40 bucks.
http://www.autopartsworld.com/new/pr...coupe&x=40&y=7
Above is for 2002...not sure what year you have, they might be the same.
You may just want to replace them all, I had one go bad and then another in less than a year. On a 4 cyl. it really sux since it's running on one or more less cylinders due to crappy parts.
2nd time around I did all 3 just for sanities sake, and something thats super easy to diy.
Re: Your plugs. Nothing fancy about it.
Loosen them, you might need a magnet to fish them out.
Check gap on new ones, put in, tighten to 15-20 ft lbs.
Every 50K miles or so should be fine. 100K like MBZ says and the tips will be
toast. NGK Iridiums can be had for about 30 bucks a set for 4 cyl.
I would do this first.
Yes, clear the error, swap the coil pack, if the problem move the cylibder you moved it to, than that coil pack is bad.
Order one online, ON ship for about 40 bucks.
http://www.autopartsworld.com/new/pr...coupe&x=40&y=7
Above is for 2002...not sure what year you have, they might be the same.
You may just want to replace them all, I had one go bad and then another in less than a year. On a 4 cyl. it really sux since it's running on one or more less cylinders due to crappy parts.
2nd time around I did all 3 just for sanities sake, and something thats super easy to diy.
Re: Your plugs. Nothing fancy about it.
Loosen them, you might need a magnet to fish them out.
Check gap on new ones, put in, tighten to 15-20 ft lbs.
Every 50K miles or so should be fine. 100K like MBZ says and the tips will be
toast. NGK Iridiums can be had for about 30 bucks a set for 4 cyl.
Last edited by C230 Sport Coup; May 15, 2007 at 02:19 PM.
Thread Starter
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Joined: Feb 2007
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From: Downtown Columbus
w211 e500
Okay, i will try that, i have an appointment with the local stearlership tomorrow. Do you guys this i should just let then fix it, seeing as i have the error codes and go from there ? I dont want them trying to say some **** like my head needs replaced or something crazy ?
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MBWorld Fanatic!
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Posts: 7,258
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
Okay, i will try that, i have an appointment with the local stearlership tomorrow. Do you guys this i should just let then fix it, seeing as i have the error codes and go from there ? I dont want them trying to say some **** like my head needs replaced or something crazy ?
Don't go to the stealer! Unless you wanna get raped, or still have warranty.
This is EASY ****e.
And re-read my other post. I update it.
If you have 6 cylinder I think you will need 2 plugs and coilpacks per cylinder. Someone chime in?
Go check it now, and order ON now! And order a set of NGK iridums plugs while you're at it! You'll have everything you'll need tomorrow, and if you decide to change the plugs while you're at it, it won't take more than an hour. You've never changed plugs before?
Just make sure you don't cross thread them
When you first start threading them in, they should turn easy by hand.
If you're a dolt and force them in and start cranking on them before they've threaded, you strip the threads. But you'd have to be a dunce to do that.
Also do it with the head cold on aluminum head.
Reduces the possibility of the above, since when hot it's kinda soft.
Last edited by C230 Sport Coup; May 15, 2007 at 02:29 PM.
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Thread Starter
Super Member
Joined: Feb 2007
Posts: 857
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From: Downtown Columbus
w211 e500
Okay so it wanst the spark plugs, but the wires from them. So i let the stealership do their thing, and vawla ! fixed. Cost the usual arm, and parts of my leg, but its back to normal and im happy. Getting rid of this damn car. Porsche, here i come. 
Thanks again guys.
Thanks again guys.
