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Old 10-14-2011, 12:59 PM
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hard starting

I have a 97 f 250 and it takes longer to start than it us to. I did a search and replaced the gp relay. When you turn the key on the volt indication on the meter goes down to about 6 volts.It doesn't appear that the relay is coming on. I put a meter on the back side of the relay and there is no voltage and the relay doesn't appear to be coming on when the key is turned on.I do have 12 volts on the red wire when the key is turned on.Where should I look next?
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Old 10-14-2011, 03:17 PM
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White smoke cloud on startup? Check the voltage drop across the relay by placing the meter leads on the large relay terminals. After the key is turned to Wait-to-Start, what's the reading (you have about 1.5-2 minutes to make the reading)? Anything more than 0.5V and the relay is not working properly (either the PCM is not commanding it to energize ... it does this by grounding one of the small terminals ... usually not the problem OR the relay is just bad). Make sure the batteries are both good (have them checked ... independent from each other, i.e. cables disconnected from both). Check the condition of all the battery cable connections at all ends. Try plugging i the block heater for about 3 hours prior to the first cold startup ... how did it start, better or about the same? Cheers!
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Old 10-14-2011, 04:14 PM
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There is no white smoke. When I turn the key on the relay is coming on.Earlier today after I replaced the relay it was not coming but the engine was hot. The voltage on the batteries drop to about 11.70 volts. I have plugged the block heater in and will try it in a couple of hours.Tomorrow I will have the batteries checked.
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Old 10-16-2011, 04:07 PM
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What now? I had the batteries checked and they were both good. When i turn the key on the wait to start light comes on for about 5 seconds and goes out.
The gp relay comes on. The voltage on the indicator in the truck drops to about ten volts and when the gp relay comes on it drops lower and stays down after the truck finally starts.
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Old 10-16-2011, 11:19 PM
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The GPR will stay closed for up to two minutes after the truck starts. Give it some time and see if your voltage comes back up. The WTS light does not indicate if the GPR is closed.
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