Where is the diagnostic port on a 1990 dodge daytona

Sounds like you may have a bad fuel pump, check your fuel pump relay and fuse first, if you find these 2 items to be operational then you more then likely have a bad pump and that will require removal of the gas tank for further inspection of the pump assembly...

there is two places where relays were placed on these cars. one where everyone knows is under the hood. second less people no is on the drives side up under by the fire wall. you have to take the bottom saftey cover off and than what each one is displayed on the back off the cover.

Coupe, sedan, or convertible?

UNDER HOOD

hello i got a 1990 dodge daytona shelby 2.5 with a a413 transmission auto there is no spacer plate on mine

it is on the right strut tower

i got a 1990 dodge daytona shelby with a 2.5 turbo there are 3 belts one is for the alt and water pump one is ps pump one is ac here is a link to some info and a diagram http://www.turbododge.com/forums/f4/f14/176277-alternator-belt-tensioner.html

hope this help keep that daytona runing it a good car o look on the hood there should be one on there

ya its about 1 or2 hr job.there is 3 or 4 bolts that hold it in . have fun

there is a concealed headlight control unit behind the dash on the left side of the steering colunm. in the fuse box it's fuse number 3

ignition modual