what is everyone talking about when they say free mods? sorry i dont know a whole lot i just got into this and im teaching myself everything.

 

modifications that are free or very inexpensive that allow the car to pick up horsepower.

 

what mods are these exactly

 

Things like the throttle body coolant bypass. http://shbox.com/1/tb_bypass.jpg

Look through the site, it offers tons of useful info. http://shbox.com/1/4th_gen_tech1.html

Searching this forum may also reveal other free mods.

 

also need help with the 02 sensors they are disconnected and cant find the wires to connect them do i need to replace a wiring harness to fix this?

 

Hmm... I'd just look over the PCM's wiring harness to see where they plug. If you mean the O2s themselves are missing the harness then you'll definitely want one.
Does the ''ok'' in your username mean Oklahoma?

 

yeah it means oklahoma

 

Where in Oklahoma
?

 

found the two connectors for the sensors coming off the headers but not the third one is it on a diffrent harness or what?

 

ardmore

 

Should only have 2 O2 sensors I think. After-cat O2's didn't come along until 96.

 

well this also has a crank sensor which didnt come along till 96 from what i understand so i guess that someone done an engine swap and got an engine and exhaust from a 96or 97? there isnt a connector for the crank sensor either. is it possible to put the newer engine in and still use the old harness and computer for the older one?

 

Wow, crank sensor too. Yeah, certainly looks like it came from a 96 or 97. If it still has the 95 PCM and harness I think it should work fine. (If I'm wrong, I'm certain someone more knowledgable will educate us soon)

If you could read the codes from the PCM, whether or not it's throwing errors for the crank sensor should let you know for sure which PCM it has. If it's a 96-7 PCM it would almost certainly throw a code for it not being hooked up. If you hook up the two forward O2's and the SES light goes out and stays out, it's probably a 95 PCM.

 

ses light isnt on could the sensor not being hooked up cause a miss

 

After you connected two of the O2 sensors or before? If the two still aren't connected and there's no light, check to see if it lights up at all when you first turn the key on. Bulb may be burnt out or removed.

EDIT: As far as I know, and I could be wrong, the crank sensor should not cause a miss. I believe it is there simply to detect a miss to meet OBDII requirements.