Running/idle/power issues
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5th Wheeling
Joined: Mar 2017
Posts: 37
Likes: 3
Well, newish EEC didn’t fix it. Bought it used out of a local Ford enthusiast. Was in better condition than mine with no blown capacitors, now it’ll run. Harder to start, but won’t die under idle. I’ve lost all power when moving though. I replaced the map sensor and that didn’t help, seemed to make it worse.
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5th Wheeling
Joined: Mar 2017
Posts: 37
Likes: 3
It’s from a 4.9 5speed as well, I haven’t had much time since I put it in. The codes I remember we got off this was 332, 212 and 10. I’ll have more time tomorrow to check codes and try to narrow it down.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
If not the engine is running pig rich with ~55 PSI fuel pressure all the time.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Your truck obviously has multiple issues. Knocking out known problems will whittle the list of issues that need resolved. The wrong fuel pressure will wreak havoc on the engine control system which in turn will damage the engine.
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5th Wheeling
Joined: Mar 2017
Posts: 37
Likes: 3
Update: was finally able to get my hands on a fuel pressure test kit. I’m sitting 47 with KOEO and 58 when idling. I have no change under load or rev. I’ve changed everything but the FPR on the fuel system. It starts to pop when it’s idled warm. No change to anything with either the front or rear pump. Any ideas?
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