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New Member
- Joined
- Jun 21, 2018
- Messages
- 6
- Reaction score
- 0
- Points
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- Vehicle Year
- 2011
- Make / Model
- Ford
- Transmission
- Manual
First off, hello all and thank you for such a great forum! I've ran into a problem with my 2011 4.0L today that ended up leaving me stranded about 10 miles from home.
Misfires on cylinder 1,2,3 and complete lack of power that gets worse with the duration of drive time/ heat soaking. There is a rotten egg smell as well. The problem will go away once the truck cools down but will come back again and get worse until I can't go over 40mph. No other faults are stored. I replaced the coil pack today because of the association of the problem with ambient engine heat. No improvements have been made, sadly. The odometer sits at 113,000 miles with a fresh tuneup using factory parts at 100,000 miles including a fuel filter. Fuel pressure was checked and noted to be running at 65 PSI at idle and on throttle. I checked charging voltage and AC voltage and found no problem. I don't believe it to be an issue with the cat as the problem doesn't exist on a cold engine. This leads me to suspect its a grounding issue that's interfering with the PCM.
After I was able to limp the truck home tonight, I was snapping the throttle and found the speedometer needle bouncing up to 10mph while I was parked and a warning chime would play. I was able to bounce the speedometer needle repeatedly by revving the engine above 4K in my driveway. With the key on, engine off and all accessories off, I can hear a faint electrical buzzing/ crackling noise coming from within the dash near the passenger area... I'm going to try hard reset on the truck tonight but was wondering if there have been known issues with PCM grounds or anything related like this?
Misfires on cylinder 1,2,3 and complete lack of power that gets worse with the duration of drive time/ heat soaking. There is a rotten egg smell as well. The problem will go away once the truck cools down but will come back again and get worse until I can't go over 40mph. No other faults are stored. I replaced the coil pack today because of the association of the problem with ambient engine heat. No improvements have been made, sadly. The odometer sits at 113,000 miles with a fresh tuneup using factory parts at 100,000 miles including a fuel filter. Fuel pressure was checked and noted to be running at 65 PSI at idle and on throttle. I checked charging voltage and AC voltage and found no problem. I don't believe it to be an issue with the cat as the problem doesn't exist on a cold engine. This leads me to suspect its a grounding issue that's interfering with the PCM.
After I was able to limp the truck home tonight, I was snapping the throttle and found the speedometer needle bouncing up to 10mph while I was parked and a warning chime would play. I was able to bounce the speedometer needle repeatedly by revving the engine above 4K in my driveway. With the key on, engine off and all accessories off, I can hear a faint electrical buzzing/ crackling noise coming from within the dash near the passenger area... I'm going to try hard reset on the truck tonight but was wondering if there have been known issues with PCM grounds or anything related like this?
