On a 1994 dodge van what is a engine light code # 39 it causes the engine to run a little rough have changed the map sensor and idle air control valve.

There could be a few different reasons why your truck is experiencing problems after replacing the map sensor. Here are a few things you can try:

Make sure the map sensor is installed correctly. Check the installation instructions and ensure that the sensor is properly seated in the correct location.

Check for any other damage or issues with the engine. If the engine has any other problems, such as a vacuum leak or a faulty ignition system, it could cause the truck to idle rough or stall.

Check for any codes or diagnostic trouble codes (DTCs) that may be stored in the engine's computer. These codes can help identify any problems with the engine or other systems that may be causing the issues you are experiencing.

Check the fuel system. If the fuel pump, fuel filter, or fuel injectors are not functioning properly, it could cause the truck to idle rough or stall.

Check the ignition system. If the spark plugs, ignition coil, or ignition con

Have you checked for a broken valve spring. Repaired a dodge engine with the same running issue as you have described and it was a broken intake valve spring.

on dodge motors
fitted a lot of parts and still no better

the fault code clears and comes back as a intermittent problem

could be electrical voltage drop off or heat related failure

i wonder if your 02 sensor ,the catalytic converter
or other related sensors
are causing the fault to come back
if needed .....fit a new air filter...

how the test is determined

P1294-TARGET IDLE NOT REACHED 3.3L/3.8L
When Monitored and Set Condition:
P1294-TARGET IDLE NOT REACHED 3.3L/3.8L
When Monitored: With the engine idling and the transmission in drive, if automatic.
There must not be a MAP sensor trouble code or a Throttle Position Sensor trouble code.
Set Condition: The engine idle is not within 200 rpm above or 100 rpm below the target
idle for 40 seconds. One trip fault.

POSSIBLE CAUSES
INTERMITTENT CONDITION
IAC MOTOR PASSAGES
VACUUM LEAKS
AIR INDUCTION SYSTEM
THROTTLE BODY AND THROTTLE LINKAGE
TEST ACTION APPLICABILITY

A bad vacuum line will cause this code also. Also it will cause a rough idle and stalling. Open the hood and listen for a hissing sound. track it and you,ll find the leak. Also I would just check all the lines to make sure another in not ready to go.

POSSIBLE CAUSES COULD BE WATER IN GAS,FAULTY IDLE AIR CONTROL VALVE, OR FUEL PUMP COULD BE FAILING.CODE SCAN FOR EGR VALVE FAULT OR INTAKE AIR TEMPERATURE SENSOR.

P0068 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of power
- Engine rough idle Possible causes - Large vacuum leak
- Leaking air duct system
- Mass Air Flow (MAF) poor electrcial connection
- Manifold Absolute Pressure (MAP) poor electrcial connection
- Faulty Mass Air Flow (MAF) sensor
- Faulty Manifold Absolute Pressure (MAP) sensor
- TP sensor not seated properly.
- Faulty Throttle Position (TP) sensor.
- Dirty throttle body
When is the code detected? The Powertrain Control Module (PCM) monitors operation rationality check by comparing sensed throttle position to mass air flow readings
P0068 DODGE Description The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing Throttle Position (TP) to Mass Air Flow (MAF) readings. If, during a self-test, the comparison of the TP sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a diagnostic trouble code is stored in continuous memory.

I have a 2001 Dodge Grand caravan Sport i have a misfire in cylinder 2 i changed the spark plugs,wires,coil,map sensor,COMPUTER,had it checked for vacum leaks (nothing),fuel filter.Basically I have almost redone the whole van and i still have the same problem. Can anyone suggest what else i could try! please

Either a bad MAP sensor, or TPS. What is the code for the check engine light? This will most likely tell you what it is.

Im not sure if you got it fixed yet! It could possibly be idle air control valve. But here some more suggestions! I had a 94 Safari van 4.3 liter I was working on for about three days and I finally figured out what was wrong with it. It would run fine for a couple minutes and as soon as I hit the gas and let off it would surge, but anyways I ended up changing the distributer, after the fuel pump and filter, mass air flow sensor, egr valve, idle air control valve, map sensor, and ignition module. So that might sove the problem if you were on the same track with it as I was. Hope this helps ya!

look for vacuum leak at air filter to throttle body ..all along the snorkel use carb cleaner while running and waft areas described til motor changes personalitly