yo,
Have you had the charging & Starting systems checked for free yet at AZ, NAPA, etc?
If all is good...
Although there is no CEL Lit, do a
Self Test for Codes; by our friend here, BroncoJoe19
do the KOEO = Key On Engine Off portion first
& Remember to have engine @ Normal Operating Temperature before doing the KEY ON ENGINE RUNNING (KOER) portion
Post any Code(s) found here
Torque Converter Operation Test & Cutaway Depiction;
"...
Torque Converter Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating correctly.
1. Carry out Quick Test with scan tool. For additional information, refer to the Powertrain Control/Emissions Diagnosis manual (PCED). Check for DTCs.
2. Connect a tachometer to the engine.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
4. After normal operating temperature is reached, maintain a constant vehicle speed of about 80 km/h (50 mph) and tap brake pedal with the left foot.
5. Engine rpm should increase when brake pedal is tapped, and decrease about five seconds after pedal is released. If this does not occur, see torque converter operation concerns.
6. If the vehicle stalls in (D) or manual 2 at idle with vehicle at a stop, move the transmission range selector lever to manual 1 position. If the vehicle stalls, see torque converter operation concerns.
7. If the vehicle exhibits a vibration during the road test complete the Road Test Evaluation Form. This form will aid the technician in determining the source of the vibration.
If the shudder occurs
a) during the 3-4 or 4-3 shift at HEAVY throttle, or
B) at 40mph in 2, OD OFF, and OD, or
c) at the same RPM in every gear, or d) coasting, cruising, or
in R, or e) during extended light braking, then it is NOT TC clutch shudder;
The following is a list of common vehicle concerns that have been misdiagnosed as torque converter clutch shudder. For diagnosis of the following items, refer to the appropriate sections of the workshop manual and the Powertrain Control/Emissions Diagnosis manual (PCED).
Spark plugs - check for cracks, high resistance or broken insulators.
Plug wires.
Fuel injector - filter may be plugged.
Fuel contamination - engine runs poorly.
EGR valve - valve may let in too much exhaust gas and cause engine to run lean.
Vacuum leak - engine will not get correct air/fuel mixture.
MAP/MAF sensor - improper air/fuel mixture.
HO2S sensor - too rich/lean air/fuel mixture.
Fuel pressure - may be too low. Engine mounts -loose/damaged mounts can cause vibration concerns. Axle joints - check for vibration..."
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
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re; "...comes to an idle the oil pressure gauge erratically jumps around them when I accelerate it returns to the high side of "normal" again...
Check sender connector/wiring.
Sender Failure; "Corrosion or faulty electrical connections; If the oil pressure gauge is pegged low after the engine is running, or is pegged high after the engine is running, or if there is intermittent illumination of an oil pressure indicator light, the sender could be faulty. Related Components to Check; All appropriate electrical connections to and from the sender The oil pressure gauge or indicator light; Appropriate fuses (see Shop or Owner’s Manual for fuse layout)..." miesk5 Note; enter applicable info for year, etc.
Source: by MOTORCRAFT®
Overview in 92-96; "The oil pressure system uses a switch and a fixed resistor; the resistor is attached to the engine wiring harness. A primary magnet, to which a shaft and pointer are attached, rotates to align this primary field, resulting in pointer position. The bobbin/coil assembly is pressed into a metal housing which has two holes for dial mounting. There are no adjustment calibrations or maintenance required for this gauge; Oil Pressure Sender - The oil pressure sender controls the magnetic oil pressure gauge's pointer position. The oil pressure sender (
switch) closes under normal engine operating conditions. The oil pressure sender opens with the engine off and no oil pressure..." read more
Source: by Steve83 @
http://www.supermotors.net/registry/media/788623
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