Rupert8
Registered User
Hello,
I recently posted a separate thread regarding changing out the CDR valve on my 1986 F250 6.9. Job done, and the truck ran fine yesterday, ran very well, even, with the new CDR valve installed.
I went to start it this afternoon and it turned over for a long time and just wouldn't start. Weird, because this truck always fires right up. On the fourth attempt, after letting the starter cool off and with my foot down on the gas pedal it finally started but then ran at crazy RPMs until I cut it off with the key.
It did this twice.
Since the only variable here is the new CDR valve, could this be the culprit of a) not starting and b) super high revs once going?
If so how would this work? My understanding of the CDR valve is patchy.
Would my starting it with the gas pedal depressed cause it to run at high RPMs even after my foot is off the pedal?
And is there a chance that the engine will runaway if I try to start it again? If so, what is the best way of stopping it? Do these 6.9s have a fuel cutoff switch?
That truck was loud in all it's fury...
Thanks as always.
I recently posted a separate thread regarding changing out the CDR valve on my 1986 F250 6.9. Job done, and the truck ran fine yesterday, ran very well, even, with the new CDR valve installed.
I went to start it this afternoon and it turned over for a long time and just wouldn't start. Weird, because this truck always fires right up. On the fourth attempt, after letting the starter cool off and with my foot down on the gas pedal it finally started but then ran at crazy RPMs until I cut it off with the key.
It did this twice.
Since the only variable here is the new CDR valve, could this be the culprit of a) not starting and b) super high revs once going?
If so how would this work? My understanding of the CDR valve is patchy.
Would my starting it with the gas pedal depressed cause it to run at high RPMs even after my foot is off the pedal?
And is there a chance that the engine will runaway if I try to start it again? If so, what is the best way of stopping it? Do these 6.9s have a fuel cutoff switch?
That truck was loud in all it's fury...
Thanks as always.
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