Hard Start/No Start - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 1 (permalink) Old 09-25-2018, 04:14 AM Thread Starter
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Hard Start/No Start

Problem started slowly with barely noticeable hard starts. Was just take 1 or 2 more cranks to start. Then no start, checked fuel filter it was very dirty changed it and engine started. Continued to have increasingly hard starts, lower fuel mileage, and a slight loss of power. Then no start, determined fuel pressure relief valve was stuck, replaced and no start, had bad batteries as well. Replaced batteries and start. Hard starts continued for 3 days then truck sat for 2 nights and no start. Started when tapped on fuel pressure regulator, very little fuel coming from injector pump. Replaced fuel pressure regulator and start. Hard starts (very hard start the 1st time then still hard but easier starts for the rest of the day) for 5 days then no start. Fuel pressure is good on the high pressure side, haven't been able to accurately check low pressure side but fuel coming from lifter pump seems like it's at a good rate and can hear lifter pump turning on. Checked grid heater seems to be fine, also in Southern Utah definitely not cold, codes say low voltage to intake heater relays 1 & 2, bypassed abattery both are clicking. Only 3 volts coming from ECM to relays but the heater shouldn't be kicking on due to warm temp so thinking this isn't a problem??? Wiggled wire harness attached to AC & crank position sensor engine started. No start when I tried wiggling it a second time. Considering replacing crank sensor. Any ideas?
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