quick jolt at constant speed - Ford Powerstroke Diesel Forum
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Old 01-01-2011, 06:32 PM
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quick jolt at constant speed

got a 96 psd with an edge evo. 125k on odometer. once in a while it has a quick jolt while driving, like it is a fuel pump but it only happens maybe 2 times in a 30 mile trip. usually happens at a constant speed. changed the fuel filter and filled up with new diesel and it is still doing it occasionally. could it be injectors? i hear your supposed to check em at about 125k but anyone got any ideas?
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Old 01-01-2011, 07:55 PM
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Are your RPM's changing when you feel the jolt?
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Old 01-01-2011, 09:37 PM
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yes but no more than 50 to 100 rpms... its very quick and the whole truck jolts for a brief second then it is back to normal. im not 100% certain it is my motor either...but im not a mechanic either!
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Old 01-05-2011, 06:49 PM
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Are you able to pull trouble codes? A random jerk at cruising speed could very well be the CPS going wonkey.
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Old 01-05-2011, 09:51 PM
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Cps most likely Advance auto has them for like 30 bucks with a lifetime warranty. If they knew how many times the 7.3 eats em they wouldn't make it lifetime. I bought mine and replaced it as a PM thing last october and just yesterday i came to a four way intersection and it just died. Cranked and cranked the RPM gauge was moving but no fire. waited a second and tried again it fired right up and bucked and jerked another 2 miles home. I kinda figured it was going out when 2 weeks before i was REALLY getting into it when the truck liked poped at 3300 on street setting ( no it wasnt the rev limiter because on street or extreame its not there i know )
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Old 01-05-2011, 09:54 PM
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Battled the same thing for a few months... new cps fixed the issue
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Old 01-05-2011, 10:12 PM
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95dieselsmoke what happened to that intercooler setup you were gonna sell me?

And later on after i got the truck it did it more offten and it wasnt the CPS it was the PCM....which i was stuck at home for 2 days.
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