Need help with this! i havin bought new spark plugs yet but il be gettin them tomorrow!!
il tell the story first!!
I left the car 4 to a panel beater to get a few scrathes done and get a lip spoiler put on!! it was running perfect before it was left down.( before you say any thing i checked milage when i got there so id know if it was moved and it wasnt) it was left there not moved for about 3 and a half months!! when they started it to do a few bits on it, it ran fine but when they started it the next time it was missin!!
so yesterday evening i took out the spark plugs and just cleaned them and put them back in but still missfireing!!! i thought even if i cleaned them it wouldn missfire for a little bit and id know that was the problem!! then i disconnected the battery for over 5 mins and when i started the engine it wouldn rev up and would let small little noises as if i put the leads the wrong way around!!
it does say service due on the clock but it didn say that when i left it down there and it hasn even done any driven!!
i am goina change plugs but could it be any thing else???
car has only 84000kilometers (last service was 51k) ( plugs thats in it have mercedes stamp so maybe there in it from new)
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Re: mercedes clk200 only fireing on two cylinders
Hi there it sounds to me like the crank shaft positioning sensor is bad because you say when you disconnected the battery and reconnected it it wouldnt even rev up thats a tell tell sign for the sensor because when you disconnected the battery you erased the memory that the computer used to control the timing
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The firing order for an '83 Mercedes-Benz V-8 is 1-5-4-8-6-3-7-2. And, here's some more information. If you are wondering which physical plug corresponds to the number 1, look at the engine's banks (it's a V-8, so there will be two banks for four cylinders). As you stand there -- you should be at the front looking toward the windshield -- the left-hand bank of cylinders are 1 to 4 (1,2,3,4) and the right-hand bank is 5 to 8 (5,6,7,8). I hope this helps.
when you say not firing have you removed the plug and checked for spark across the plug points. If you haven't done that then do so as misfiring can also be from faulty injector( blocked tip or faulty electronics)
Summary: Monitor oil leaks: keep fluids topped up. Consider repair if the leaks are major.
Replace / Check: Idler tensioner - if this belt breaks you won't have cooling and the battery won't charge.
Miss-Fire: find the root cause and remedy poor fuel economy and can damage other components like the catalytic converter and these are not check to replace.
Don't spend $4200 with Mercedes - find a reliable mechanic who will do the work at a more reasonable cost.
I have to assume that the car looked & drove well when you bought it otherwise it would still be on the lot. I think $4200 seems a bit steep - The dealer you bought it off may be able to recommend a mechanic see them first but if not them certainly see another mechanic other than Mercedes - if you don't have a mechanic you trust head towards a larger franchise business in Australia we have places like UltraTune & K-Mart.
As far as what I would tackle - I am not sure what "Leaking Motor Mounts" - but I will assume there are some leaks - I would be guessing minor ones from the motor. Even though they may sound bad they are probably your lowest priority if they are small you do need to keep an eye on them however and make sure your fluids are kept topped up.
Get the idler belt checked - they can be a pain to try to do yourself get the belt replaced. Then look at your miss-fires. Have new spark plugs put in regardless (is my opinion). See if there error still persists if so then most times it is ignition coils that is the problem a mechanic can check this by swapping the 3 & 6 coil to other cylinders and see if the error moves, replace the affected coil. If the error stays on 3 & 6 it is likely blocked / faulty injector. Carsales.com.au (This is AU pricing) indicates that you bought within a good price bracket. 2001 Mercedes-Benz C240Average Private Price+$10,000 - $12,300Trade In Price Guide+$7,300 - $9,600Average km+180,000 - 300,000Price When New (RRP)+$73,500
I can see if I can find more prices these are ALFA ROMEO prices (indicative). Ignition Coil: $150 - $250ea; Spark Plugs: $15ea; Injector: Service / clean remove / replace: $600; New Fuel injector: $300. Labour in AU charged by mechanics is around $95 - $180 per hour.
If you have a 3,1 motor, there's a very good chance your lower intake manifold gasket is allowing coolant into cylinder 1 and keeping it from firing. Number 1 is right next to a coolant port, ant the 3.1/3,4's are very well known for intake gasket failure.
remove the plug from the #1 cylinder, and install it into the #2 cylinder , and put plug from # 2 clyinder in to #1 plug hole, connect plug wires, and start up vehichle, and if computer shows misfire on # 2 cylinder , then you have a bad plug, possibly porcelin insulator could have a hair line crack in it, hope that this information has helped you.
If it is a 4.2L or a 4.6L , it most likely needs spark plugs and spark plug wires. Please only use Ford spark plugs or it will not fun good after. After market spark plugs do not work too well in a Ford. After market spark plug wires can be used ok. If it is a 5.4L it has Coil On Plug which means each cylinder has its own Coil. If thats the case you may need 2 coils as well as plugs. Hope this helps. Cobra.. :-)
You need 3 things.
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 13-13.5 lbs on your TBI
If you have all 3 then move on to injector pulse to both injectors.
Keep me posted and recheck your spark plug wire to make sure they are not crossed. firing order 1-2-3-4-5-6 cylinder # passenger side 1-3-5 front to back. cylinder # drivers side 2-4-6 front to back distributor #1 is located at the 7 o"clock and rotates clock wise so next distributor post on the right working clock wise is #2. Good luck and hope this helps.
hi there i dont know how but i think the crank shaft sensor was damaged or is defective when you disconnected the battery you erased the computers memory for the timing and thats why it did not want to rev up