When starting the truck after it has set and cooled it misfires and crossfires for about 5 miles and eventually runs normal. I have checked the wiring, replaced the crank position sensor and spark plugs,but has made no difference
I answered this question yesterday, with a suggestion that there might be moisture condensation on some ignition components. Try a water dispersant spray (WD-40 etc). See that there is no steam from a coolant vent releasing into the engine compartment or that you have not parked over a damp/wet area, if you can, try parking the vehicle overnight with the hood open and see how it goes the next morning.
SOURCE: 1995 Dodge Dakota Pick up
go to Didgeforums.com.
I had a similiar problem, found the solution there. It was the wiring harnes on the drivers side under the hood, just above the wheel well. there are a cluster of wires in a bundle. I unpacked the bundle carefuly and sure enough the were two or three wires all coroded, had wite powder from corosion. repaired the connections and bingo. I posted details at dodgeforums.com. browse around there. I posted pictures as well. this is a common problem.
SOURCE: slow start 2004 dodge dakota v8
P0038 typically indicates O2 sensor failure or possible grounding out if the cabling to it has failed. Start with that as it is easier to replace than all the plugs/coils etc. Reset the code and cross your fingers.
SOURCE: Misfire cylinder 5 2000 dodge dakota
when u press the gas pedal to go this opens the throttle valve, the idle speed of your engine is computer controlled, this is done by the ISC (idle speed control) airbypass valve, these parts get full of gunk and then get a stalling problem at or near idle, clean them by doing the following, if u don't understand the instructions seek help from your friend.
, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
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
SOURCE: 99 dodge caravan #4 cylinder misfires, i replaced
This is a known dodge issue replce the injector!!!!! done deal
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