Welcome Visitor! Please take a few seconds and williamigriffith
Member
- Joined
- Jul 7, 2009
- Messages
- 11
- Vehicle Year
- 2003
- Transmission
- Automatic
I had all kinds of power problems at highway speed, with much knocking and loss of power as well as a rough idle. As I had just bought the truck, I went through and cleaned or replaced about anything serviceable. At the bottom of this, you will find my original plea for help. In any case, the ultimate culprit turned out that the catalyst was plugged on one side, the misfire 4/5/6 side. Surprisingly, no one suggested looking there first. Well, at least everything else should be in good shape now, but perhaps much of it done needlessly. The idle is now much smoother with much better overall performance. Let me know if this helps you
Original message:
I recently bought an immaculate Ranger Edge with 3.0 flex fuel engine, automatic, 2WD and 120,000 miles. On hills the truck seems to be starving for fuel and cannot maintain speed. If you depress until downshift, it still cannot maintain speed and knocks a good bit at the higher RPM. The codes I am getting are misfire on 4/5/6 and lean on bank 1. Bank one of course should be opposite from the misfire side. If I reset the codes, they won't return until the engine is pulling on a hill, particularly above 50 mph. It starts easily and idles a bit roughly, but not terribly. I think it does better when it is cold, but not sure. These symptoms are overall better due to a variety of maintenance that I have performed (the female owner changed oil religiously, but little else), which includes: new plugs and wires, new air filter, cleaned MAF, cleaned Throttle Plate (for idle), replaced fuel filter and replaced O2 sensors. Unfortunately, it still lacks power and seems to be starved when asked to work. I ran some Techron throurgh it, but that made no difference. I also tried some E85 to no avail. My code reader is not real sophisticated, so I am not sure if there are any other codes that it may not be telling me (I doubt there is, but??). I was considering looking at the EGR differential pressure gadget, as I thought that could possibly be causing some of this. Also, I have not looked for vacuum leaks, but I was thinking that such a leak might make it idle rough, but problably not lean out, unless it was a huge leak or causing some other malfunction. I don't think the coil pack is involved, because I switched a few wires (fires on compression and exhaust stroke) to no avail.
If I thought the local dealer was good, and they aren't, I would take it to them. Does anyone have any plausible explanations and/or remedies?
Griff
Original message:
I recently bought an immaculate Ranger Edge with 3.0 flex fuel engine, automatic, 2WD and 120,000 miles. On hills the truck seems to be starving for fuel and cannot maintain speed. If you depress until downshift, it still cannot maintain speed and knocks a good bit at the higher RPM. The codes I am getting are misfire on 4/5/6 and lean on bank 1. Bank one of course should be opposite from the misfire side. If I reset the codes, they won't return until the engine is pulling on a hill, particularly above 50 mph. It starts easily and idles a bit roughly, but not terribly. I think it does better when it is cold, but not sure. These symptoms are overall better due to a variety of maintenance that I have performed (the female owner changed oil religiously, but little else), which includes: new plugs and wires, new air filter, cleaned MAF, cleaned Throttle Plate (for idle), replaced fuel filter and replaced O2 sensors. Unfortunately, it still lacks power and seems to be starved when asked to work. I ran some Techron throurgh it, but that made no difference. I also tried some E85 to no avail. My code reader is not real sophisticated, so I am not sure if there are any other codes that it may not be telling me (I doubt there is, but??). I was considering looking at the EGR differential pressure gadget, as I thought that could possibly be causing some of this. Also, I have not looked for vacuum leaks, but I was thinking that such a leak might make it idle rough, but problably not lean out, unless it was a huge leak or causing some other malfunction. I don't think the coil pack is involved, because I switched a few wires (fires on compression and exhaust stroke) to no avail.
If I thought the local dealer was good, and they aren't, I would take it to them. Does anyone have any plausible explanations and/or remedies?
Griff
