1990 jetta 1.8L gas ODB Port location
 

i recently purchased a 90 jetta GL 1.8 L was running good, then i started to have driveability issues. does any one know where the ODB port is located in this model. the Chiltons manual says it is under the center console, on the drivers side. the book with my scan tool says under the drivers dash. i have the dash out and have pulled the carpet back and the center console out. still i cant find an ODB II 16 pin port, or the 3 black, white, and blue plugs for the VAG 1551 scan tool used by the dealer.

RE: 1990 jetta 1.8L gas ODB Port location
 

Right next to the steering column. it's up under the dash.

RE: 1990 jetta 1.8L gas ODB Port location
 

thanks i will look there again.

RE: 1990 jetta 1.8L gas ODB Port location
 

1990?
check under the shifter cover
it will not have a obd 16 pin only the old black and white plugs

RE: 1990 jetta 1.8L gas ODB Port location
 

ya i talked to VW dealer and they said the same thing. but some body has moved them or they were never installed at the factory. i have the carpet out on the drivers side, the center console out and i can find nothing. i havent found anything resembeling the plug description in my chiltons yet. i am about ready to put it all back togather and start testing components with VOM. i think this is my only option at this point. thanks for the post though i appreciate the help.

RE: 1990 jetta 1.8L gas ODB Port location
 

what is the car doing?
that early obd isnt that good at telling you anything anyway

temp sensors allways going bad

RE: 1990 jetta 1.8L gas ODB Port location
 

hard starting, no power, cuts out at highway speed. when it started i thought fuel filter, changed it out and it was fine, a couple weeks later it started again so i cahnged the fuel filter again thinking something had came loose in the tank or something. but did not help this time. fuel pump seems to run ok when the ignition is swithed on, though i have not checked the fuel rail pressue yet. i was hoping for a dignostic to know where to start looking first. 2000 miles ago i did a complete tune up and oil change, the only thing i did not do is check the timing setting. it seemed to be running good at that time.

RE: 1990 jetta 1.8L gas ODB Port location
 

check your pree pump
the in tank pump goes bad and can cause allot of problems
get in your trunk and remove cover plate pull off fuel lines and have someone turn the key on to see if you get fuel out of the tank

RE: 1990 jetta 1.8L gas ODB Port location
 

thanks i will start there, it will be next week but i will let you know what happens.