Where do i plug in at to check codes on 85 s10 blazer?

any fuel in it?

old post. and pops up for Geo, i help poor Geo owners.
what engine options. GM offered 10 engines that year.
so can not answer you. ever , lacking that key fact.

85 is an old car and must have missed the nation wide crush program. they are very hard to get running, (vacuum magic H3LL)

1.9L option
that is normal, it is gutless.
the 379 Diesel, not that has some big time torque......

i believs so, i think there is a bolt/pin holding it in under the canceling cam

You first need to run a fault code test on this engine, to do that go here.

80-90 0r 85-90 are bolth ok

I have most all of the wiring diagrams for your vehicle. Can you narrow down what you need as there are many? If you need me to send them to you then send me your email address.

check your map sensor

First, unless you have just done some clutch work you should not need to be bleeding the clutch hydraulic system...that shows that it's leaking. There is nothing inside the bellhousing that has anything to do with clutch fluid, so, the fluid you see is either engine or transmission oil (rear main seal or seal on trans input shaft) Could it be that the clutch slave is leaking and it's running down and dripping at the bottom of the housing? (clean it up and check that)

MANY PROBLEMS WITH THE HALL EFFECT SENSOR AND IGNITION MODULE LOCATED IN THE DISTRIBUTOR......ALSO CHECK FOR POWER ON COIL....KEEP IN MIND THE COILS GO BAD ALOT ALSO

have you checked, cady, fuel tank, is it getting the right amount of gas and air? plugs and wires, go with general mantinence first then step up. i have a 85 s10 blazer that was a lemon off the lot but has over 300000 on it and it has the same prob i fix it tempurary by flipping the lid on the breather upside down so it gets more air