2005 5.4 rough idle and ping - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
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post #1 of 3 (permalink) Old 01-27-2009, 03:00 AM Thread Starter
fourtirefire's Avatar
Join Date: Aug 2008
Location: Kelowna, BC
Posts: 23
2005 5.4 rough idle and ping

Hey everyone, hope that I can get a bit of help on resolving this issue.
First off, my trucks a 2005 f150 5.4L with 88,000km on it
Ever since i bought the truck (@79,000km) it tends to have some pinging under mid-heavy loads. It does tend to somewhat disappear when I use 90 octane gas vs standard 87 but still audible. All along this hasn't been a huge issue, just was going to be one of those next time I take it to ford i'll get that looked after as it's probably just the cam phaser being hooped.
Now just tonight as I was stopped, idling in gear all of a sudden it started running really rough, almost as if it had lost a cylinder or two and I could hear an even more audible pinging sound. I stopped, shut the truck off, restarted it, still ran rough and the CEL lit up. Drove it home and any time there was more than a light load there was some quite audible random pinging.
I don't have a scanner or programmer to find out what code(s) were thrown, but just wondering if anyone out there has experienced this problem before.
Either way, I'm taking it to ford in the morning to see what is up.
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post #2 of 3 (permalink) Old 01-27-2009, 04:58 AM
swackly's Avatar
Join Date: Oct 2008
Location: Omemee Ontario
Posts: 547
Maybe the knock sensor? I had that happen on my old 91 f150
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post #3 of 3 (permalink) Old 01-27-2009, 08:27 PM Thread Starter
fourtirefire's Avatar
Join Date: Aug 2008
Location: Kelowna, BC
Posts: 23
All fixed, ended up being #2 injector was stuck closed. Got that covered under warranty. Also got a reprogam on the pcm to eliminate the pinging I had been hearing.
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