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Discussion Starter #1 (Edited)
Got cold out finally, 15 degrees and on the way home my smart started acting up again. 146,xxx miles and I got a P0303 code, then after resetting, I got a P0302 but it went away when I restarted the engine.

I hope it is the plugs I installed as they were the standard Denso plugs and not the long life ones. It could be time for new ones as it has been right around 30K miles, and I do have these fancy RED coils from Smart Madness (with lifetime warranty)

It is possible I got some bad gas, used the same station I always use, but I did fill up before driving to work... At least I made it home (46 miles )
 

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Discussion Starter #3

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The really cold temps were the issue with our car and it turned out to be a burned valve.....:)
 

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Discussion Starter #5
That's what I am afraid of. Gonna try the plugs but I am thinking it is a valve, however it does seem to change to a different cylinder. May be time to hang up these smarts... I still have the Land Rover...
 

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Discussion Starter #7
OK.. Been a pretty lousy week with the sub-zero weather, snow, and stuff. Today it is above zero, ok 7 degrees above zero, and I ran out of cars again. Got the Land Rover home but it was a 43 mile drive without brakes at -17 degrees out... Anyhow...

Put spark plugs in the smart, #3 cylinder, seems to run much smoother, but after about 2 miles, I got the flashing CEL again. this time a P030 error. so I put in plugs in cyl 1 and 2. Agsin took a drive. same thing. 2 miles and the CEL again, P0302 again. I had the 2 old coils from abut a year ago when I installed new ones so I changed coil #2 ... drove around for about 5-6 miles.. NO LIGHT!! This is the second coil I have had fail, both were relatively new, and one was about 100 miles on it.

at least I now have the longer life plugs installed so that will take that out of the problems list. Now if my feet will thaw out before I head to work.... we'll see how it does with some drive time on it!!
 

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Discussion Starter #8
OK.. Been a pretty lousy week with the sub-zero weather, snow, and stuff. Today it is above zero, ok 7 degrees above zero, and I ran out of cars again. Got the Land Rover home but it was a 43 mile drive without brakes at -17 degrees out... Anyhow...

Put spark plugs in the smart, #3 cylinder, seems to run much smoother, but after about 2 miles, I got the flashing CEL again. this time a P030 error. so I put in plugs in cyl 1 and 2. Again took a drive. same thing. 2 miles and the CEL again, P0302 again. I had the 2 old coils from abut a year ago when I installed new ones so I changed coil #2 ... drove around for about 5-6 miles.. NO LIGHT!! This is the second coil I have had fail, both were relatively new, and one was about 100 miles on it.

at least I now have the longer life plugs installed so that will take that out of the problems list. Now if my feet will thaw out before I head to work.... we'll see how it does with some drive time on it!!
 

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Discussion Starter #10
Yes they were. first one that failed, was replaced as soon as I contacted them. I suspect this one will be the same. My only concern is that I might need to carry a spare or two for when they fail.
 
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