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  #1  
Old 01-29-2013, 12:23 PM
Kanuts Kanuts is offline
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Angry Started when really cold now have miss fire

Ok got a 2008 dodge ram 1500 4.7L.. As like alot of the post the truck has always had its little ticking noise at cold start and after it warms up the tick goes away...
we recently just had really cold weather it was about 5 degrees out when i went to start my truck and when doing so the motor jerked really hard as if it was trying to hop right out of the truck... i tried restarting it and its running really rough... took the truck in and they said that it is reading the #4 cylinder is misfireing... i changed the ignition coil (as i was told it was probably that) and there is no difference... the motor is still running really rough and also the ticking noise is really loud and doesnt stop when the truck is warm.... i read alot of post on similar problems and i see some say could be the fuel injector... I have no idea what it is can any one help me get this figured out? or atleast give me a good guess as to what it may be with out it costing me a fortune having test done at a shop???

Thanks
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  #2  
Old 01-29-2013, 01:16 PM
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tjbiker031 tjbiker031 is offline
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does it sound metallic? listen to it and determine where it's coming from. you can use a mechanics stethoscope to help pinpoint the location and what's ticking. it can be bought at a parts store fairly cheap
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Old 01-29-2013, 02:15 PM
Kanuts Kanuts is offline
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Its coming from the same area the 4th cylinder is... is sounds the same as the cold tick like most 4.7L's make but louder

My guess is the valve... but im not a mech. so thats why i am trying to get answers...
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Old 01-30-2013, 07:30 AM
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tjbiker031 tjbiker031 is offline
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Well start with the basics. Compression test that cylinder. (alot of helpful videos on youtube to show you how to do this..ie Eric the car guy). Also see if the fuel injector is firing. you can test by touching the injector while runing and you should feel it pulse. but this isnt the best way to test. test the leads with a multimeter to check the ground, power and signal wires. I highly suggest you get a copy of the factory service manual. It will help trouble shoot and help you diagnose. You can get a free copy of the service manual online....dont always trust hanynes or chiltons....not always complete
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Old 01-30-2013, 09:57 AM
Kanuts Kanuts is offline
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you have the web address where i can get the manual? im going to be running what ever test i can this weekend
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Old 01-30-2013, 08:18 PM
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tjbiker031 tjbiker031 is offline
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http://apicdn.viglink.com/api/click?...om%252F2fu8oyn

this will help a lot, but be prepared that you may have a messed up valve seat.. it's possible
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