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post #1 of 20 (permalink) Old 12-12-2014, 12:43 PM Thread Starter
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Intermittent no start

I am having a problem with my 07 optima. I have installed new battery and tested alternator and starter no issues there. The car will just intermittently not start. Today I went out to start (after installing new battery last night) and nothing but lights on dash, no clicks or anything. Hooked up my trusty battery charger with 50amp start setting turned key, nothing. Turned key again started no problem. Has started several times since then no issues.

Wondering if this could be an intermittent problem with a faulty Neutral Safety Switch.

Any advise or help is appreciated

Aorose

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post #2 of 20 (permalink) Old 01-01-2015, 07:38 PM
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Check the battery voltage with the meter to be sure @ 12.5 volts, which I'm sure it is.
Most find the starter to be the problem. Need to check if any voltage to starter/solenoid when key in start position. If not, when key in start position, move the shift lever back and forth to see if any change, or place the lever in neutral to see if any difference.
If all fails, need to check neutral safety switch continuity.
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post #3 of 20 (permalink) Old 02-08-2016, 11:43 AM
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I'm having similar problems with my son's car as well. I figured I'd post here instead of starting a new thread. Noticed a few times since we bought the car a couple weeks ago, as you would go to turn the key to start the car, you just get a click, no start. Try again and it starts. Yesterday I went to start the car for him to move it, it hasn't been started since Thursday, turn the key and got 1 click sound. Tried it again and again and it would just click. Seems like there's power, as all the lights come on. At first thought you would think weak battery, but I'm not sure here after reading and searching. Ugh, used cars....one thing after the other.
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post #4 of 20 (permalink) Old 02-09-2016, 08:00 AM
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Make certain battery is @ 12.5 volts and cables are clean tight, lights are bright, turn interior light on and hit the starter. If lights stay bright, I'd say starter. Never replaced one on the Kia, but the starter is down under the air cleaner assembly and once it's accessed you can check voltage with a MM or jump the terminals. You might want to tap it with a hammer to see if it starts. From what I've seen with starters, once it gives the warning click and everything is in order, the starter will only operate for a short period before it completely gives up.

Many years ago a Jeep Grand Cherokee V8 had given me the warning, but was waiting until the weekend to do a replacement. In a driving rain at a mall, it decided not to start, just click. I must have turned the key 100 times before I got it to operate, drove it home into the garage and replaced the starter that day.
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post #5 of 20 (permalink) Old 02-09-2016, 11:04 AM
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Ok. I'll check the voltage and the cables. It does seem like all the lights are bright. For now it's very intermittent. Last night I went to move it to the driveway because I thought we we were getting snow, it started right up. After I moved it, I turned it off, and started it again, no problem. It is having that issue with the shifter........that if it's not in park just right you cant't remove the key or turn the key in the ignition. Could that have something to do with the starting issue?
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post #6 of 20 (permalink) Old 02-09-2016, 03:33 PM
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No, you're hearing the starter solenoid click so power is getting to the starter.

When you place the shifter in Park take you hand and move it to the left and see if that helps.
Occasionally the shifter lube becomes hard or non existent and the lever will hang up and not fully return to the left.

Hopefully that will work, and if it does, to fix correctly, the console needs to come out to clean and relube the linkage, or just try moving it back and forth when in Park.

Last edited by turbonut; 02-09-2016 at 03:40 PM.
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post #7 of 20 (permalink) Old 02-09-2016, 03:59 PM
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Could it be the ignition switch or the neutral safety switch? I read those items can cause this issue too. If it was the starter, would it happen so infrequently? I'll work on the shifter issue this weekend. Tough to do things during the week with work etc.
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post #8 of 20 (permalink) Old 02-09-2016, 04:37 PM
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Mark...
I see there has been no mention of checking the starter relay under the hood....
The starter relay would "click" and the starter motor would not turn over "if" it was bad...
There are contacts within the relay that handle the heavy current needed to activate the Bendex solenoid that is located on the starter...
The Bendex solenoid then closes a high current switch (within the starter) and the starter motor then spins...

SO...

A bad/intermittent starter relay WILL keep the starter motor from getting the activation power (+12v) need to crank the engine...
Your comment about the headlights stay bright tells me that the battery connections are OK and you need not go there...
Dave
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post #9 of 20 (permalink) Old 02-15-2016, 11:54 PM
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Quote:
Originally Posted by DavesSpectra View Post
Mark...
I see there has been no mention of checking the starter relay under the hood....
The starter relay would "click" and the starter motor would not turn over "if" it was bad...
There are contacts within the relay that handle the heavy current needed to activate the Bendex solenoid that is located on the starter...
The Bendex solenoid then closes a high current switch (within the starter) and the starter motor then spins...

SO...

A bad/intermittent starter relay WILL keep the starter motor from getting the activation power (+12v) need to crank the engine...
Your comment about the headlights stay bright tells me that the battery connections are OK and you need not go there...
Dave
This is the most likely cause IMO I have seen this same problem on other makes had a toyota bought to me recently doing it, the owner had already at other shops thrown a new starter $365 plus labor to fit and ignition switch at $89 plus a fair bit of labor to fit at the problem and it was still intermittent, I immediately swapped a horn relay for the starter relay and the problem went away cost him $7 for a new bosch relay and approx a 1/2 hours labor.
He was happy with me but not so pleased with the sums previously spent.
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post #10 of 20 (permalink) Old 02-16-2016, 11:55 AM
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Quote:
Originally Posted by Classic boy View Post
This is the most likely cause IMO I have seen this same problem on other makes had a toyota bought to me recently doing it, the owner had already at other shops thrown a new starter $365 plus labor to fit and ignition switch at $89 plus a fair bit of labor to fit at the problem and it was still intermittent, I immediately swapped a horn relay for the starter relay and the problem went away cost him $7 for a new bosch relay and approx a 1/2 hours labor.
He was happy with me but not so pleased with the sums previously spent.
I wonder if I should just go ahead and replace the relay for piece of mind. I assume this is the part: https://www.rockauto.com/en/moreinfo...433347&jsn=423

Last edited by Marc (NJ); 02-16-2016 at 12:10 PM.
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