Rick, long story short....
I've read a post about a DML'er who had 2 Rams. 1 ran
great and another ran lousey. He couldn't figure out what
the problem was until he started swapping parts off of the
better performing Ram. He swapped out the MAP sensor
and bingo!
After hearing your symptoms, this story just popped in. I
tried to find it in the archives but could not. Here is some info
on sensors causing similar problems from Bob Tom. I would
suggest using the DML archives and search engine as they
are priceless in these situations. Hope this helps!
GS -
----------------------------------------------------------------------------
-------------------
MAP SENSOR FAILURE SYMPTOMS: Poor running, stalling, light on dash
A MAP sensor can be inaccurate, sending an incorrect voltage to the
computer.
If this voltage is still within the range of voltage the computer expects,
a light
or trouble code for the MAP sensor may not be set. Fords are particularly
susceptible to this. problem.
THROTTLE POSITION SENSOR FAILURE SYMPTOMS: Hesitation on quick
acceleration (passing, "flooring it") , sometimes bad idle. May not
illuminate
light or set codes.
The above three sensors along with the ECT sensor are considered "essential"
sensors. They or their circuits can make an engine barely run or not
run. Other
sensors make very fine adjustments to the afr and timing, and do not often
cause a gross poor running condition. Because these "major" sensors can
trigger fault codes in other "minor" sensors, it would be better to analyze
non-computer items, like wiring, coil, fuel injectors or fuel supply before
trying
to trace down a code generated by a "minor" sensor.
Bob
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:03:15 EDT