I can't remember, but don't OBDII cars have crank sensors? I know the LT4 vettes had them.

 

thx lloyd,i will hang a little more with the car,i if there is no good response of that like you said ,im really considering do it carb to make easy the tuning think,im courios what type of dist you need to put to change it with carb

thx for the info

 

before that, get a base tune from PCMforless. If the L and R O2's are still way different and you are having a scan that looks anything like what you have now, you have some problems with opti, opti harness, wires, coil, plugs, exhaust leaks, bad O2, vacuum leak, leak between MAF and TB, etc,etc, etc.

I would hold off on the carb for a while. You have just not found the problem. A tune would possibly fix everything or at least eliminate a BUNCH of problems and possibilities.

 

When did he say that the O2's are way different? If it's back firing, I would think that you either have a bad vacuum leak or your valves aren't adjusted correctly. If your O2's are way different than each other, then I'd suggest you have one of the above problems. Also, like Lloyd said, don't carb it. Get it running right and leave it fuel injected.

 

eh, my bad on the L and R O2 statement. I re read these posts and not sure what the scans show or if this one has been scanned. I was confusing this thread with a similar one with a guy having tuning problems (Playa7970 or somthinmg like that).

 

It's cool Lloyd. I completely understand. Sometimes these threads all run together.

 

hi,yeah,the car in data master scanner is running right the 02 sensors ,damm i will pay $200 bucks that said me whats going with this

thx a lot for the info.

 

If the car was OBDI, I'd take a look at the tune. I can't help when I can't see a log or the program. Good luck.

 

my car in my sig was put together and was broke in (650 miles) with a tune for a 306 comp cam it runs rich... but i got a 305 so we figured it wasnt to bad of a rich.. moe went to tune it and my opti threw a low res code what the **** so we couldnt tune it.. new MSD pro billet opti now on waiting tune

 

i installed a used opti of a friend and the is still slow dammit i dont know what to do know

 

It's not the opti then.... get a datamaster log of the thing and someone can help you out then.

Bret

 

so pcmforless is the best tune for the LE2 package
thx for all responses!

 

Reborn post,LOL


yesterday i raced my brothers Z06 with Cam ,longtubes,he only won by 1 car length,but my SES started flashing and when i gear to 4th (powershifting)i felt like the car retard timing,or something,im suspecting that my Opti is gone again,my Opti is a summit brand,i think it does not hang 6500 RPMS frequently,lol