The 3.3l engine is running very badly after running fine for a month after sitting for years. We did all tuneups and even had the transmission rebuilt. It almost stalls but will usually run for a few minutes. Computer diagnostic machine said "coilpack, cylinders 2 & 3. We have since replaced the coil pack and no change at all.
SOURCE: No Start, No Spark, for Grand Caravan 3.8L
we get remans bad out of the box......... good luck
SOURCE: My 1999 Intrepid has a Non-cylinder specific
In the tune up, did you replace the wires too? Check your firing order also.
SOURCE: 01 dodge dekota 4.7L misfire on cylinder one only
depending on what kind of of scanner you used for codes,
cylinder #5,doesn't always mean cylinder #5,
it sometimes means the fifth cylinder in the firing order.
Chrysler's DRB scanner would give us the exact cylinder,
if you connect your scanner again see if you can watch the misfire counts happening,if you can pull a wire of off a different cylinder and see what cylinder the scanner calls it.
SOURCE: MIL indicates cylinder misfire on 1, 3, and 5
Check for
vacuum leaks on intake manifold,
the air tube between the air filter.
intake manifold vacuum hose.
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clean throttle plate with Berryman carburator cleaner
SEE sample picture HERE
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Also remove carbon built up behind the EGR valve and the EGR passage tube.
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Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.
More un-metered air (leaks) will lean out the fuel mixture.
Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.
At idle,just spray and listen for the RPM surge.
The in-rush of carb clearer will increase the RPM on the motor.
Record the problem spot(s) and address it later.
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EGR carbon built up require 2+ hours to clean from start to finish.
You will need a new EGR base gasket before your start.
Locate and remove the EGR valve after the vehicle is cool down.
Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.
Remove the EGR valve.
Inspect the location of the carbon built-up inside the valve and the EGR passage tube.
SOAK these areas with WD-40 spary.
You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.
RE-SOAK the carbon and let it sit for over-night will also help.
One the last round,pass a shop vacuum of the EGR valve and the passage pipe.
Install the new EGR gasket and connectors.
Allow the vehicle to warm up outdoor to burn up any remaining WD-40.
Take it for a test drive.
Please rate my answer if it's useful to you.
Cheers,
Mustgo
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