Ok heres some more details. Car is copmletely stock besides the K&N and exhaust which were put on long time ago with no problems.

Before doing the delteq the car had a slight stumble at idle that you had to pay attention to to even notice. When the car was cold it ran great and when it got hot it started the slight stumble. The slight stumble eventually got worse and the RPMs started to surge up when I was at a stop light. Turned out to be one of the wires #8 i think but I decided to to the delteq so that future wire changes would be easier.

After doing the Delteq, I have dead misses on 1 and 5 cylinders which goes away once ive driven about 5 miles.

 

what methods did you use to determine the miss is ONLY on 1 and 5? and you said the miss completely goes away after driving.

 

I agree, I need a new mechanic. I weant to this place because it was supposed to be the best performance shop around my area. Was recommended to me by one of the users on this website. I also took it to another performace shop recommended on this site but he wanted $500 just to do the wires and no plugs.

The mecahnic i am using now, he took out the #1 and 5 plugs to see if they were cracked or damaged but he said they were fine.

He hooked up this wire to the coil and the plug wire to the other end and it had a transparent section in the middle where you could watch the spark and this was how he determined #1 and 5 arent firing.

 

He hooked up this wire to the coil and the plug wire to the other end and it had a transparent section in the middle where you could watch the spark and this was how he determined #1 and 5 arent firing.

not really sure as to what you are talking about here? but if the guy know that they were missing because of no spark then why was he replacing fuel injecotrs, maf, ect? if you are losing spark the maybe the ignition module is cutting out. but usally that happens more often when it is hot. not cold then going away after driving. are you sure he even did check them. he doesnt sound do really no what he was doing and was just wondering if you saw him check this stuff or just taking his work for it.

 

so he knew there was no spark on 1 and 5 and yet he went ahead and replaced the maf and injectors, wow...

 

At first, because it runs fine after a while, ever time i got it down to his shop it was running smooth and he refused to consider that there was anything wrong with the firing even though i kept insisting on it. Anyway he kept randomly blaming everything else so finally I waited till my day off and instead of driving it down there i had it towed so that it would do its problem and not go away on the drive over. This was when he finnaly hooked up that tool to the coil post and the plug wire and you could see the elecrtic current going through it on the plastic transparent section. At this point he finally admits theres a spark problem and the we do the 5 different opti-boxes. On monday he said hes going to tell Delteq and say he wants a whole new system or else hes just going to return this one and go back to the optispark.

This car is my only mode of transportation so I have always been right there watching all of the work be done. And I dont mean in the waiting room or outside. I was under the hood watching the whole time.

BTW does anyone else know what tool Im talking about for seeing the spark? I dont know what its called, I had never seen one before, but i thought it was pretty cool.

 

Yea that thing went out with high button shoes but has reappeared lately. Know exactly what you are talking about.

 

Well i hate to say it but your first mistake was not figuring out what was wrong with the car first. You always want to start with a good runing car before doing an upgrade or changing something, because now you have many variables of what could be wrong with the car instead of fixing it first.

Your mechanic is a moron. Nothing to do with lt1s, he is just an idiot

If he thought it was the maf, why wouldnt he unplug it and send it into speed density mode instead of replacing it?

Why didnt he use a noid light to see if the injectors were firing first?

You wasted alot of money for nothing
He is a typical parts changer.. Where do you live, i have a tech 2 flash and id be willing to scan it for you for free, im in ct

 

couldnt it still be the optis fault? considering even with the delteq, the optical sensor in the optispark is still used to determine timing?

 

That's true.

So the car runs bad cold, but once it gets to operating temp it's fine?

Sounds like a coolant temp sensor to me. Test it with the procedure on shbox.com

 

Would the coolant temp sensor or the optical eye sensor cause a miss in just 2 cyclinders though?

 

I don't think you have a misfire in 2 cylinders. Until you have a GM tech 2 saying that, you can't go by what your idiot mechanic says by his wire test.

 

thats why i love my tech 2, i even have the tech 2 flash, you can see Everything.

i would think the optical sensor would cause more then 2 cyl to run bad

 

Well, I suppose I wil take it to the dealer then. Anyone have any idea roughly what the cost is for a Tech 2 disagnostic service?

 

Check the prongs under the coils. They could have an intermittent contact.
The Delteq system uses the Cadillac/Aurora modual setup if I remember correct.
It could be the modual too. When mine went bad on my Cadillac It would do the same exact thing.
Check your plugs, if they are getting old or if the porchlain insulator is loose on your new ones.(this one is annoying because you can't see it with the naked eye)
One more thing, check the fuses under the hood. I found out the ign and the eng sensor fuses were loose in my box causing a similar problem.
Good luck, I hope you figure this out.