02 SOHC won't start when warmed up, starts when cold (Battery not issue) - Focus Fanatics
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Old 07-26-2013, 07:05 PM   #1
jay-rod05
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Thumbs down SOLVED: 02 SOHC won't start when warmed up, starts when cold (Battery not issue)

I have an 02 sedan with an SPI SOHC and my car will not crank when the car is warmed up (I don't know if that has anything to do with it).

On Sunday I drove around for about an hour, came back home to grab something, went back out to my car but it would not crank. Two hours later, I got back in the car and it cranked just fine (little bit of a stutter if I remember).

I haven't driven since Sunday evening until today. I drove to work just fine this morning. But when I went out to my car this evening to drive back home the car would not crank. I didn't know what to do so I kicked the valve cover about 10 times in anger and it started up just fine after that.

I drove home and parked, turned off the car and attempted to recrank the car and nothing happened. I proceeded to kick the valve cover again and tried to restart but nothing happened.

I swapped the relay for the rear defroster and the starting system and they both seem to work, when I turn the key to start I can here the relay click once but that's the only sound that is made.

I have a ScanGauge II that I have reading the voltage but it shows 12.4v when I'm attempting to crank so I don't think it's a dead battery.

I went ahead and purchased a new starter motor and may have a local shop install it but I wanted to check with the community if there were any other less time intensive things to try to diagnose what the issue is (the starter motor is a super bich to get to).

Any comments would be greatly appreciated.



Last edited by jay-rod05; 07-27-2013 at 01:53 PM.
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Old 07-26-2013, 11:32 PM   #2
jetrinka
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If you've got a volt meter, make sure you have voltage at all times to the main starter motor connection (the big wire) and battery voltage to the solenoid wire when the key is turned to the crank position. If both of these things exist and no starter operation is present, the starter is bad.
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Old 07-27-2013, 06:55 AM   #3
tmittelstaedt
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It is probably the contacts in the starter that the solenoid uses to connect main power to the motor. A new solenoid is about $25. You can take your existing solenoid off and then take it apart and look at the contacts in it, and if they are bad just replace the solenoid.

The other thing that does is is a loose battery cable or loose wires to the starter.
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Old 07-27-2013, 09:12 AM   #4
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Check your battery cables for corrosion, both positive and negative.
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Old 07-27-2013, 01:51 PM   #5
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Thank you guys for the suggestions. I ended up just taking it to the dealer and having it replaced. On sunday I had ordered a starter in anticipation that it was the issue. The best deal I found was on Amazon for $62:

http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1

Cost $279 in labor to replace at the dealership but all is well now. They gave me back the old starter and it seems like there is stuff loose inside as if I shake it I can hear what I guess are the brushes moving. The new one didn't make any noise when shaken.

Total cost to fix an intermittent non-starting focus: $341.00

Mileage: 156,710
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