Im having a lot of problems with my 91' acura legend, my D4 light is flashing, im also having problems with the transmision it has a hard time shifting from 1st to 2nd gear only, my speedometer is not working, and also which i think is the most important part of all when i put the car in P(park) the RPMs starts going up and down, and later it died. any ideas??

 

For the up and down revs, first try and bleed the air out of your cooling system. The speedometer (could also affect your shifting) is possibly a result of a bad VSS (vehicle speed sensor).

 

How can we bleed the air out of the cooling system? I am having a similar problem- car only has a 110k miles. I changed the VSS but the car is still doing the same thing, when I first start the car the RPM stays stable for a little while and then starts to go up and down, then the check engine lights up when I am in drive and then the D starts blinking and after the car is warm the revving just stays at 1700 rpm- I am very desperate please help or email me at realprince01@yahoo.com

 

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