I am still having some strange problems with my 3.9 01 Dakota. I will say
take a half hour trip to the store,it runs great,go in for 30 min,come back
out start it up and begin to drive out of the parking lot and it seems like
the idle goes high and low,back and forth,like its revving high and then
dropping down,at times in reverse it will stall out.

Another thing i notice is durign the same situation above,when i go back and
try to start,i will turn the key and crank for say 4-5 seconds and it wont
start,stop for a second then hit the key again and it fires right up.

I had an oldsmobile that sort of did this and the problem was a mass airflow
sensor.

Anyone have any ideas what my problem might be? I just changed all the wires
and plugs,air filter and pcv valve,thinking these would fix the problem but
they didnt
Thanks

 

Anyone seen symptoms like this with the 3.9? I am at a loss for what to try next.