'09 Passion turns over, won't start (bad spark plugs) - Smart Car Forums
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post #1 of 16 (permalink) Old 05-27-2019, 09:02 AM Thread Starter
 
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'09 Passion turns over, won't start (bad spark plugs)

so, AFAIK, I've read all the posts about the fuel pump possibilities, which I DIY replaced with a brand new Delphi (she had just filled the tank the day before the issue presented) and I've read the posts about the CPS (crank position sensor) which I swapped this morning with a known good one from my 2014. still no start, just a slow(er) crank until the ignition cuts itself off, just as it's been doing all along.

we bought it brand new from the Seattle smart center almost exactly ten years ago.
battery has 12.39VDC.
currently no OBD II codes.
139k+ miles.
the only time it's ever been in the shop was last year to recharge the A/C & do the 100k recommended maint.
I've done religious oil/filter and air filter changes (DIY).
it's always had Premium, 92 octane.

any thoughts?

what's the best or easiest way to check for spark on these? I've poked around a little from the top & bottom (bellypan is still removed from fuel tank drop) but honestly I'm not sure where the coil pack is located.

I feel I'm a fairly competent mechanic (doesn't everyone think that) as I rebuild & mod antique GoldWings, but these are a bit of a different breed & until now I've never really needed to dig into it to do anything other than swap rims & tires and the simple maint.

all assistance appreciated!
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post #2 of 16 (permalink) Old 05-27-2019, 02:27 PM Thread Starter
 
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forgot, I visually inspected all the fuses but didn't continuity test them with a meter.
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post #3 of 16 (permalink) Old 05-27-2019, 02:36 PM
 
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The coil packs are individually located on top of each spark plug holder.

You could have a canbus/ECU issue rather than a mechanical problem.

Thanks

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post #4 of 16 (permalink) Old 05-27-2019, 02:54 PM
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check battery voltage when it is cranking. 12.39 sounds a bit low. A fully charges battery should be up over 13 volts , my guess is you lost some capacity in the battery and if it drops below 11 volts, you need a new one. Also when running, voltage should be around 14 volts

A low battery will cause all sorts of problems as everything is electrical on these cars
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post #5 of 16 (permalink) Old 05-28-2019, 06:47 PM
 
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Fully charged automotive batteries should measure at 12.6 volts or above. When the engine is running, this measurement should be 13.7 to 14.7 volts. If you don't have a multimeter to tell you the voltage of your battery, you can do a test of your electrical system by starting the car and turning on the headlights.
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post #6 of 16 (permalink) Old 05-29-2019, 06:24 AM Thread Starter
 
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Originally Posted by Brabus451 View Post
The coil packs are individually located on top of each spark plug holder.

You could have a canbus/ECU issue rather than a mechanical problem.

Thanks

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ah, good to know. THANKS!
I was a little worried it might be a SAM problem.
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post #7 of 16 (permalink) Old 05-29-2019, 06:25 AM Thread Starter
 
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Originally Posted by jimvw57 View Post
check battery voltage when it is cranking. 12.39 sounds a bit low. A fully charges battery should be up over 13 volts , my guess is you lost some capacity in the battery and if it drops below 11 volts, you need a new one. Also when running, voltage should be around 14 volts

A low battery will cause all sorts of problems as everything is electrical on these cars
rodger that, jim.
thanks!
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post #8 of 16 (permalink) Old 05-29-2019, 06:27 AM Thread Starter
 
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Originally Posted by smark View Post
Fully charged automotive batteries should measure at 12.6 volts or above. When the engine is running, this measurement should be 13.7 to 14.7 volts. If you don't have a multimeter to tell you the voltage of your battery, you can do a test of your electrical system by starting the car and turning on the headlights.
thanks smark!
got a meter, just can't test the charging voltage. 🙂
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post #9 of 16 (permalink) Old 05-29-2019, 06:35 AM
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check voltage at battery while the motor is running. That should give you a general idea of the charging voltage.checking with the headlights off, then on should show about the same voltage. if it gets lower with the headlights on, suspect the battery or the alternator.

Changing the battery is much easier than the alternator so try that first. If a battery is more than 3 years old, replace it. I have seen brand new batteries fail too.
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post #10 of 16 (permalink) Old 05-29-2019, 09:31 AM
 
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thanks smark!
got a meter, just can't test the charging voltage. 🙂
I have two other late model vehicles, that had bad batteries. Both of them, less then 2 years old. Bad battery cells. You weren’t able to start them. The dash board lights flickered like Christmas lamps. Couldn’t lock the doors, The gear shifter, inhibitors locked up. Couldn’t pull the shifter, out of park. I don’t think the smart car system, is as sophisticated as both those vehicles. Modern cars need a fully charged good battery to run them.

My wife left our smart cars head lamps on. Didn’t have auto shut off, like the rest of our cars. Dead as a door nail. I Was able to jump start it. Drove it for 30 minutes, it was fine again. The original smart car battery lasted 6 years.

Might want to just replace your battery. Give that a try first. I keep one of these jump start devices in all our vehicle now. Tried of getting stranded somewhere.
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