Join Date: Sep 2005
Location: Pembroke Ontario Canada
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Did the genuis at the shop who checked your van, take the time to check the oxygen sensor(s)? Check them before you go and throw anymore money away. A bad fuel pump will not cause what you decribed, it will just stop working and leave you stranded.
A plugged fuel filter, bad fuel pressure regulator, bad MAP sensor and bad oxygen sensors can cause these running problems.
I believe the 3.8 has 2 and upflow and a downflow. get them to do a voltage switch test on both sensors, if the voltage doesn't change as the sensor heats up its gone bad. Also all modern oxygen sensors have a heating element to heat the sensor up quickly, sometimes this heating element goes bad.
Oxygen sensors won't always set a trouble code when they go bad and they cause all kinds of running problems such as what you decribed.
1993 caravan SE 3.0L 3 speed 220,000 miles my second caravan bought new. over the past 13 years i've replaced: 1 fuel pump, 1 front crank bearing and seal, 3 timing belts & water pumps, 3 exhaust systems, 4 sets of sway bar bushings, 1 catelytic convertor, 2 sets of engine mounts, 1 set of front struts, 1 alternator, 2 batteries, 1 computer, 5 sets of tires, 6 sets of plugs, 3 sets of plug wires, 2 coils, 2 TPS, 1 IAC, 2 Speed sensors, 3 Map sensors, 2 Coolant sensors, 1 Drivers side door (rusted out) and countless oil changes.
2004 Grand Caravan 3.3L 46,000 miles. Picked up at an auction.
2005 Kia Sedona 32,000 miles "wifes van"
2001 Ford F-250 Quad cab (farm truck) 71,000 miles
1991 Honda si. (Gas sipper) Presently in the process of restoration 0 miles after restoration
1988 caravan 3.0L 3 speed, Finally drove her to the wreckers in 2002 with 297,000 miles on her. (May she rest in peace)
God sure made me handy with a roll of duct tape.
Last edited by Chet42; 12-23-2005 at 11:17 PM.