sante65

I have encountered dtc16. Anyone have any experience with this. I have a 93 lt1. I suspect my ECM is bad.

bassackwards

It is your opti. Time to replace it

sante65

Brand new opti. Followed procedure in manual. No reference voltage coming from ECM.

bassackwards

Where did you get it?

sante65

Petris enterprises. Nice unit.

Shop manual says if you are not receiving 5v reference voltage from ECM then distributor has no signal to process. Replace ECM.

bassackwards

Read my old posts then send that POS back.

Your opti is junk

sante65

I read every single post. Shop manual does not elude to bad distributor. I hate to think it could be the distributor.

bassackwards

So did I. He sent me 2 that kept throwing the dreaded 16 and I finally fixed it with a free one off Craigslist.

Another member here is in the process of returning another one. You will be replacing yours too.

sante65

Did your car start with code 16?

bassackwards

Yes with both of them from Petris.

Pradaomygada

LOL They probably sent you the bad opti I just took back! sorry. I bought one 7 months ago. It went bad...they forgot to put a seal inside the unit. They sent me another...Still got a code 16. Took it back and got a full refund no questions asked. I Bought a Chandler Motorsports opti off Ebay for $110 and the code 16 went away. My car is still not reliable. I have an intermittent code 15. I believe it to be the ECM. That's a whole other story. If there's a code 16 set, then there is a problem with the opti.

bassackwards

I wanted to say this. You could have it fingerprinted and see if ours are on it.

sante65

Well, after much testing I've finally come to the conclusion that my Petris opti is also bad. I've done every single test both from the FSM and from Petris troubleshooting doc. I checked all grounds and even sent my ECM out for testing; it came back without defect. I hate to think that this thing has to come out again.

bassackwards

I hate it for you. It is no fun to swap them.