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Caravan poor idling, starting and running up to speed
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Caravan poor idling, starting and running up to speed
Hi I have a 99 Grand Caravan. All of a sudden I started experiencing problems with starting the car. It turns over but takes 4-5 seconds to get going. Then the idle is very up and down for 4-5 seconds before settling. Again when the car is put into gear it can stutter and surge erratically but not always especially noticeable during warmer parts of the day. However if I stop rev the car a bit and start again I can often accelerate quite smoothly. Once I am at highway speed there is not problem at all until I stop again. If the air temp is very high I cannot get the car to start at all. I have checked the error codes on the dash and received 23 (IAT sensor). I have removed the MAP sensor and cleaned it which changed nothing, starting the car with the sensor disconnected produced exactly the same results. I currently do not have a multimeter, should I replace the MAP sensor?
Welcome to DF
If the IAT sensor Idle air temp sensor is a problem, replace it. Thats not the same as a baro/map sensor. I would also remove the throttle body and clean the AIS motor and the throttle blade.
Replaced the map sensor no luck , I have cleaned the throttle body and checked for vacuum leaks all are fine. I cannot find the IAT sensor nor any mention of it online for this model, any ideas where I might find it? maybe its a ghost code? Thanks again
Following up on this I now have the car running, the problem was the fuel pump. I had hoped it was the fuel filter. The error code was completely false in this case as it is in many others. Using logic I would have gone for the fuel line first but went last due to the error code. Ignore it is my advice