1996 Dodge Ram 1500 Hard Start

1996 DODGE
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CRAIGH
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i have a 96 dodge 1500 4x4 360 motor.starts hard mostly when cold sometimes when warmed up.(it cranks for awhile befor it starts.)checked fuel pressure ar rail 30psi when first turn key on.when cranking it jumps up to 48-52 psi.replaced fuel pump assy. still does same thing.could fuel pump be bad?i know it's possible that new ones are defective.no codes can be found.replaced cam sensor(hall effect),cleaned iac valve,and reset components with computer.acts like fuel is leaking down?could injectors be leaking down?oro-rings on injectors cause this?
Mar 16, 2007 at 11:34 AM
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RASMATAZ
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[quote:1e7371f441="craigh"]i have a 96 dodge 1500 4x4 360 motor.starts hard mostly when cold sometimes when warmed up.(it cranks for awhile befor it starts.)checked fuel pressure ar rail 30psi when first turn key on.when cranking it jumps up to 48-52 psi.replaced fuel pump assy. still does same thing.could fuel pump be bad?i know it's possible that new ones are defective.no codes can be found.replaced cam sensor(hall effect),cleaned iac valve,and reset components with computer.acts like fuel is leaking down?could injectors be leaking down?oro-rings on injectors cause this?[/quote:1e7371f441]

If its fuel related-try the fuel pressure regulator

BTW when was the last time the spark plugs been changed?
Mar 16, 2007 at 4:59 PM
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RSARARENCH
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Ive seen this twice before on a fleet of snow plow truck I maintain 14 to be exact. The coil wire on those truck, in my opion is way too long it runs down the right side of the engine thier prone to heat and they will get weak and cause this very same problem. Their cheap and easy to replace. Try that and see what happens. Randy
Mar 25, 2007 at 3:59 AM

Suggested Repair

If the hard start is fuel-related, check the fuel pressure regulator and confirm spark plugs are due for replacement. Also replace the coil wire, which can weaken from heat along the right side of the engine and cause the same long-crank symptom.

Conversation Summary

A 1996 Dodge 1500 4x4 with a 360 cranks a long time before starting, mostly when cold and sometimes when warm. Fuel pressure is about 30 psi at key-on and 48-52 psi while cranking. The fuel pump assembly, cam sensor, and IAC cleaning did not fix it, and no codes are present. One reply suggests checking the fuel pressure regulator and spark plugs; another recommends replacing the heat-prone coil wire.

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