cutting out at 72MPH - Ford Powerstroke Diesel Forum
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Old 11-20-2012, 06:52 AM
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cutting out at 72MPH

while driving over 70mph the truck started cutting out like it was missing, it also died, for short time then was running again. I replaced the cps sensor back in the summer. back then it would act like it was missing then after several months it would die and not start after a long wait. replace the cps sensor and all was good. now i cant go over 70 and it will act up. any ideas?
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Old 11-20-2012, 08:17 AM
Hee Hee, he's doing it...
 

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What is your high pressure oil line pressure? What is your fuel pressure?
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Old 11-20-2012, 08:39 AM
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Bigfuel not sure how to check that, my guages look good but i dont think that is what your referring to.
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Old 11-20-2012, 10:13 AM
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Checking fuel pressure is easiest. Ideally you need one of these (Summit Racing® Chrome Plated Fuel Pressure Gauges SUM-800199 - SummitRacing.com what ever one you buy does't really matter but it needs to be fluid filled to stabilize the needle) and a 1/8"-1/8" NPT female coupler. On the back of the fuel bowl there is a Schrader Valve. Spin out the valve from the port and install the coupler and gauge. This will get you idling and neutral rev'ed fuel pressure but if you install an 1/4" rubber line rated to 100 psi and Diesel you can run the line to your windshield wiper and watch the Fuel pressure as you drive.

For the HPOP oil galleys get a gauge rated for oil and 3000 psi. have your local hose-man or tracktor shop make you a line that will come off the oil galley in the head (I think that it's 1/4" NPT for the hose) and do the same thing. Run it to your windshield wire and watch it as you drive.

An expensive auto scanner will be able to monitor the HPOP but those are big bucks.
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