Weak Starter???? also CAI ? - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 06-11-2013, 09:19 PM Thread Starter
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Weak Starter???? also CAI ?

OK, so Ive been having random long cranks, and Ive ruled out HPO. I'm posting a screen of the graph of RPM and Voltage during cranking. I'm trying to rule out Cam sensor and Crank sensor, so Im hoping this will help to rule out a weak starter. It sounds ok cranking it over. Bottom is seconds, left side is RPM. Thick line is the RPM reading and the thin line above is Voltage but it doesn't show it on the graph, the voltage drops to a low of 10.2 so Im thinking new batteries might be something to look at.

Also, the CAI the prev. owner installed is just, well I don't even know how to say it but it doesn't work well. the filter gets hot. but the ambient temp was 103 deg, and letting it idle the IAT was 148. my ? is is this that bad, if so, how bad is it affecting mileage/ power?
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post #2 of 3 Old 06-13-2013, 09:59 PM Thread Starter
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post #3 of 3 Old 06-13-2013, 11:51 PM
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I cant tell what your rpm is by the chart.
But the minimum rpm is: 100rpm's, again (the minimum) should be well above 150
FICM voltage minimum is: 8 volts.

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