1994formulalt1

throwing codes
11-malfunction indicator lamp circuit problem
16- Ign system problem loss of low res pulse signal
36- ign system problem loss of high res pulse signal

do you think i just need a new sensor in the opti or the whole opti itself? i replaced the whole opti about 3 months ago then 2 weeks later the sensor went bad so i replaced it and now its doing the same thing again. any ideas? i just graduated the police academy and im planning on getting a new job soon then time for an ls1 tired of lt1s and this bullshit

1994formulalt1

o btw its a 95 trans am only mod is a cai

ss.slp.ls1

iTrader: (36)

Well it's possible it could be a bad/damaged opti wire harness. You could try and ohm out the wires going from the opti to the PCM. Otherwise, it's your opti. To replace the sensor, you need to remove and tear apart your current opti, might as well get a whole new OEM opti. Be sure to thread lock the rotor screws.

1994formulalt1

where can i buy an oem opti i thought they didnt make them anymore? i replaced the wire harness for the opti wheneve i did it about 4 months ago but i replaced the opti with an advanced auto parts one

ss.slp.ls1

iTrader: (36)

http://cgi.ebay.com/ebaymotors/92-93...Q5fAccessories

EDIT: That's for a '94 which I thought was what you needed because of your SN. But I see in the title of this thread that you now have a '95, which requires a vented '95-'97 opti.

1994formulalt1

http://www.summitracing.com/parts/AC...model|TRANS+AM

is that an oem one?

robsquikz28

iTrader: (246)

MAKE sure you buy a GM OPTI OR DELPHI OPTI ONLY.....NO OTHER BRAND

ss.slp.ls1

iTrader: (36)

Yes. Not a bad price either. I could have sworn they were over a hundred dollars more like a year ago...

1994formulalt1

ok i ordered the gm one but it didn't say anywhere on the site if it came with a cap and rotor or if it is just the optispark. where can i buy the module in case i need the module or does it come with it?

ss.slp.ls1

iTrader: (36)

What you ordered is a complete unit, you don't need anything additional. If you are talking about the ignition control module (ICM), you have to order that seperately.

Be sure to thread lock your rotor screws, regardless of the fact that it's a brand new unit. You'll need an E4 inverted torx socket to remove the cap (you can get one at Autozone). Then you'll need a T7 (I believe) torx bit/socket to remove the rotor screws. Remove one at a time and apply thread locker to the threads and retighten the screw. A little more than snug, don't go crazy and strip it out. Put the cap back on and you should be able to enjoy a long opti-trouble-free driving.

1994formulalt1

where can i buy the icm?

1994formulalt1

i replaced the icm about 4 months ago with one from advanced auto parts do i need to buy an oem one? the icm kinda looks like a coil and it has a wire that connects it to the optispark right?

ss.slp.ls1

iTrader: (36)

No it doesn't look like a coil, that IS the coil, lol. The ICM is the little module that is bolted to the same bracket that the coil mounts to. There is a 4 prong wire harness connector that plugs into it.

Yes, I would only use an OEM coil and OEM ICM.

Coil and ICM seen here:
http://chevythunder.com/lt1_electrical_page.htm