Should be the first thing tried... I don't see where it was. Sounds just like what a 6A did to me, once.

 

Sounds very familiar to what I just went through which turned out to be the opti.

 

I would say if your going to do it do it right the first time with gm parts. But thats just me there are alot of people here that have gm opti s that go out in a couple years and some that are from auto zone that last 12. So my opinion do the ac delco

 

First of all if you suspect something is breaking down when it gets hot. You should warm up the suspect part with a blow dryer while the engine is dead cold. Instead of just throwing parts at the problem.

Second, when trying to begin to trouble shoot any problem. Start with the symptom and go where it logically leads you first. Then once the logical things have been exhausted, then start to go for the more mundane sources.

Just because someone says they had a symptom similar to yours and cured it by doing xyz, doesn't mean you are going to find the same thing.

Your problem is either something breaking down once warmed up. OR you have a control problem once the engine heats up and goes into closed loop. This is where I have had a problem before. That is why I told you to unplug an O2 and see how it runs then. Doing so will put the PCM into open loop operation. The same as when it's cold. If it runs better then, you know you have a control problem and should focus on that area.

If you feel you have a heat soaking issue, simply warm the suspect device and see if it is now failing after having been good when cold.

The chances the opti is failing when hot is much slimmer than other components doing the same. But a blow dryer can be a friend.

Capish

 

well for one i did not tell him to throw parts at it i just told him i had the same thing and not to start replacing everything. Mine turned out to be the opti and thats all i said i told him to see if he was getting spark when it was warmed up because that would tell him if it was an ignition problem. But he should also see if the car has a control problem. But did not tell him to just go out and buy parts because if it is the opti there are ways to test them i just dont know them off the top of my head. But he shouldn't rule it out either of the two

 

Who referred to you. I was talking about the guy that started this post.

You have issues you need to work out if you think for one minute I was referring to you.

Now quit wasting time bickering and help the poor OP.

Capish

 

Its the damn opti pickup. And fwiw, i bought an ebay opti, id have to check on the seller, but it runs fine so far, over a year.

 

I wasn't trying to bicker I was just saying he needed to trouble shoot just came out wrong no offence

 

Smack down

Ya'll need to contain yourselves. But FWIW, I agree.

Heat or closed loop problem.

 

LOL! i didn't mean to **** anybody off :P

All your guys input was a great help!! I haven't touched the opti ever... My car is tuned to rev past 8 grand... Im sure the bearing is going bad or ect.. I was expecting opti problems sooner or later!

After I test the loop! by unplugging the 02's I will give an update... If it still fails I will be buying a whole new opti... Since i think it is time anyways..

Thanks again for ALL your help! seriously...

So lets say.... unplugging the o2's work.... What there to check from there?

 

Wait, so you want us to actually use our brains instead of just immediately blaming the opti for everything?

But seriously, check for vacuum/exhaust leaks, make sure the o2 sensors aren't covered in soot, make sure the MAF sensor elements are clean.

 

im having the same exact issue, replaced the coil, ICM and disconnected the 6al and still shuts down after 15mins or so of running. left it alone for 2 days and the temp dropped outside about 20deg so its about 45 deg outside right now. let it run for a hour and now it wont stall,runs perfect?? my opti is only a month old but its a autozone opti so that should say enough,loL! but i cant figure my issue out either and i hate to mess with the opti if its not the issue.

 

thats how i felt when i did mine i bought on ebay and it ran fine but then stalled i thought no way could it be the opti and i figured i didn't line up the dowel right and took the thing off at least 7 times and bought all the water pump gaskets in my entire area so put it back together and still had the same problem bought one from gm and put it in and never had an issue but what helped me determine it was i checked the spark until it stalled and that was the problem. good luck

 

yeah i just dont understand for my situation why it isnt doing it now that the temp is a lil cooler. once the motor is warm id think the opti would fail no matter what the temp outside is, especially if its just sitting idling.

 

listen, dont mean to sound cocky, but ive had my share of bad optis to know the signs. the tach is jumping all over the place because thats the crank reference driving your tach, correct? so why do you think the pcm is causing your tach to jump? because it cant make sense of the skewed info the crank sensor is giving it, which is all part of the optical eye! sometimes they just rebuild these things and of course they work when checked but they dont heat them up to operating temps and check them. I had the EXACT same problem. If you scan it you will probably find low resolution or high resolution pulse failures. Stop f'in around and replace the opti. Good day.