- Joined
- Apr 13, 2008
- Messages
- 1,045
- Reaction score
- 114
- Points
- 63
- Location
- Ft. Lauderdale, FL
- Vehicle Year
- 99
- Make / Model
- XL Spurt
- Engine Type
- 3.0 V6
- Engine Size
- 3.0 (Flex)
- Transmission
- Manual
- 2WD / 4WD
- 4WD
- My credo
- A properly suspensioned Ranger can be safely airborne for up to 4 seconds at a time! =:O
Started out as this "ROUGH AS CRAP" below 2200 RPM problem...
http://therangerstation.com/forums/showthread.php?t=161830
... which was "improving" over time, i.e. only having to drive 3 miles until it "smoothed out", instead of 5... this MIGHT have been due to running E85, and then PREMium 91 octane (E10)
... and let me admit that the lack of a CEL/MIL has caused me to procrastinate pulling OBD-II codes... my bad. The fact that it fires right up every time I turn the key also lulled me into "wait and see"...
... THEN I said, oh, let's go back to UNL-Regular 87 (E10)...
But now it's rough up to 3,000 RPM, and even HIGHER, and after driving just 5 miles, some portion of the exhaust system is getting so hot, I can smell "something burning"... gotta be super-LEAN, eh? Afraid to drive it much farther.
After sitting 24 hours, fired it up and let it idle, and the exhaust was clear, but reeked of RAW gasoline = super RICH, eh? WTH?
Summary: seems to run best (not perfect) on Premium 91, second best on E85 (90 octane??), and UNdriveable on Regular 87... ??
>>> Could one or more Oxygen / O2 Sensors cause this?
Will finally drive the 3 blocks to auto parts store for some code dumping tomorrow... should be able to watch it go thru most of the cold-start (91 degF outside) to hot-running progression... HMMMmmmm...
http://therangerstation.com/forums/showthread.php?t=161830
... which was "improving" over time, i.e. only having to drive 3 miles until it "smoothed out", instead of 5... this MIGHT have been due to running E85, and then PREMium 91 octane (E10)
... and let me admit that the lack of a CEL/MIL has caused me to procrastinate pulling OBD-II codes... my bad. The fact that it fires right up every time I turn the key also lulled me into "wait and see"...
... THEN I said, oh, let's go back to UNL-Regular 87 (E10)...
But now it's rough up to 3,000 RPM, and even HIGHER, and after driving just 5 miles, some portion of the exhaust system is getting so hot, I can smell "something burning"... gotta be super-LEAN, eh? Afraid to drive it much farther.
After sitting 24 hours, fired it up and let it idle, and the exhaust was clear, but reeked of RAW gasoline = super RICH, eh? WTH?
Summary: seems to run best (not perfect) on Premium 91, second best on E85 (90 octane??), and UNdriveable on Regular 87... ??
>>> Could one or more Oxygen / O2 Sensors cause this?
Will finally drive the 3 blocks to auto parts store for some code dumping tomorrow... should be able to watch it go thru most of the cold-start (91 degF outside) to hot-running progression... HMMMmmmm...