2003 Ford F350 my truck shakes on acceleration and at idle

Tiny
WENDELL77
  • MEMBER
  • 2003 FORD F-350
  • V8
  • 4WD
  • AUTOMATIC
  • 71,000 MILES
My truck shakes quite a bit on acceleration and at idle on deceleration it smooths out. As soon as you hit the gas it starts again. If you are rolling at 30-40 mph and shift to neutral shaking stops. It does shake in park, drive and reverse. Also there is a strong sulfur odor from the exhaust. And a check engine light on. Where do I start to look to fix this or these problems. Thanks.
Friday, November 27th, 2009 AT 4:58 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi wendell77 and TY for the donation

Your starting point of diagnosis here is to get the computer scanned for OBD2 code/s you have a problem within the engine management system without it there's no lead to the problem get back asap
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Friday, November 27th, 2009 AT 6:25 PM
Tiny
WENDELL77
  • MEMBER
  • 5 POSTS
I ha dthe obd2 scanned two codes came up (1st) p0316 -crankshaft position sensor. I replaced it
(2nd) p0305- cylinder misfire detected - cylinder #5
probable cause: spark plug fault, or wires or coil, vaccuum leak, injector fault or high or low fuel pressure.
How do I know which cylinder is #5? What should check next without having to replace every thing on the list? Thanks wendell
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Saturday, November 28th, 2009 AT 1:12 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What liter engine do you have? A misfire in a specific cylinder should prompt you to check that cyl sparkplug, compression and injector

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
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Saturday, November 28th, 2009 AT 4:52 PM
Tiny
WENDELL77
  • MEMBER
  • 5 POSTS
5.4 V8 I replaced the coil and spark plug it has corrected the problem. Thanks for your help I'll be sure to use you again. You saved me alot of money by being able to do the repairs myself. I will let other know of this service. Wendell
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Sunday, November 29th, 2009 AT 11:12 AM
Tiny
THIS IS MIKE
  • MECHANIC
  • 686 POSTS
Thank you for your donation, we really appreciate it. We hope we can help you the next time you need help with your car repair problems.
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Wednesday, December 16th, 2009 AT 5:14 PM

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