Anyone in the Troy/Rochester area able to lend a hand or give an opinion?

[hoogiesngrinderz]

Optis have a rotor and cap which should trigger spark as long as the coil is energized.

The low resolution track is for injector pulse

The high resolution track is for timing control

[meissen]

When you open the fuse panel in the engine bay (unscrew the cover and lift up), on the inside of the cover is a diagram of which fuse goes to what. I'd start checking basically all of them. There's also the fuse panel in the dash next to the driver's side door. Open the door and you'll see the panel on the side of the dash. Again a diagram is on the cover which tells you what each fuse is.

[blacklt1firebird]

just got off work, plugged in my Tech2 again just to look, im definately NOT getting a signal from the crank position sensor, my engine speed on my tech2 did not register anything while cranking it... looks like im replacing the Opti eh?

[JoeliusZ28]

Well, again there is no crank sensor on OBD1, but it is starting to sound like an opti to me

[meissen]

An opti or a blown fuse... start with the basics, we haven't heard if you've checked the fuses yet. Disconnecting the battery and reconnecting it - who knows, maybe some static caused a surge and it blew a fuse.

[blacklt1firebird]

An opti or a blown fuse... start with the basics, we haven't heard if you've checked the fuses yet. Disconnecting the battery and reconnecting it - who knows, maybe some static caused a surge and it blew a fuse.

I did try disconnecting and reconnecting the battery. No luck! im in the process of checking fuses now. I got a few buddies over with about 5 f-bodies in front of my house right now so at least we look cool. haha

[meissen]

Well while you got a bunch of guys there - try this:
http://shbox.com/1/4th_gen_tech2.html#opti_test

[meissen]

Here's an optispark being sold locally and cheap, too!

http://www.mifbody.com/vbulletin/sho...325#post742325

[blacklt1firebird]

Here's an optispark being sold locally and cheap, too!

http://www.mifbody.com/vbulletin/sho...325#post742325

I may go buy one of those Opti's just to have one on hand but good news! I got her running! The wire going to the Opti was not grounded properly, after lookin up a few wiring diagrams i traced back to the ground and as soon as i fixed it it fired right up!!! I was jumpin for joy haha

[hoogiesngrinderz]

That's good to hear! I'm curious though, do you think was it spark or injector related? I know if the low resolution track isn't there the injectors will not pulse.

From what I gather, the opti does three things...acts like a conventional distributor (cap and rotor), low resolution for the injectors, and high resolution to control the spark timing

[blacklt1firebird]

That's good to hear! I'm curious though, do you think was it spark or injector related? I know if the low resolution track isn't there the injectors will not pulse.

From what I gather, the opti does three things...acts like a conventional distributor (cap and rotor), low resolution for the injectors, and high resolution to control the spark timing

When i scanned it last night it threw the 16 code for low res, i played with the connector and scanned it again tonight and threw the code 16 and 36 for high res, i cleared the codes and checked the connector with a multimeter which was reading low so i jumped it from the connector to the ground on the battery and it fired right up... So im not exactly sure... haha

[blacklt1firebird]

i wanna delete this opti now though! too complicated for me lol

[hoogiesngrinderz]

It is possible, but not cheap

[meissen]

So the next question, Josh -- did the proper ground also fix the rough idle issue for you?

[blacklt1firebird]

So the next question, Josh -- did the proper ground also fix the rough idle issue for you?

Yes it did. seems to be running fine now and thanks for the write up on the opti! Really helped me to understand how it works