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Luckily I do have a stock 2004 GTO tune that i have been referencing and using to help troubleshoot all this BS. At this point i have the VE dialed in, the MAF dialed in, the start issues almost...

Couldn't agree more, it seems to me in this case that the shop just has a cookie cutter tune that they just load up on peoples cars, do a run or 2 take there money and send them on there way thinking...

I am now 99% sure that the problem with the random hard starts is indeed with the tune like I initially thought at the beginning of this mess. I guess I just kept thinking there is no way that a...

I have more logs then i know what to do with given i have been fighting this problem for months. Ill try to organize something that makes sense and post a few. Regardless, it looks like the tuner...

Right and I understand why they would change it to 14.1, but why would you do that if you tuned using lambda? Maybe I just don?t understand how that table interacts with the other fueling tables. I...

Went ahead and tried changing the stoich table to 14.7. I've had mixed results, but it does seem to have made it better....kind of. It seems now cold starts are not happy, but hot starts are (i.e the...

Probably a dumb question, but I cant seem to find a straight answer. IF (dont know for sure) my car was tuned and the tuner used lambda targeting 1.0 to tune it as opposed to targeting a specific AFR...

That?s what I was thinking....why would so much have to change. Shit just doesn?t make sense.



I have read this other places after I posted it, but was thinking I may try changing it just to...

None its a stock 2004 LS1 other than longtube headers and exhaust, and a custom CAI.

I got the injectors in the other day, just hadn't had time to actually test it yet, but my fingers are crossed.

Don't think its the problem, but i have decided to pull the trigger on the injectors. We will see if the issue goes away or remains.

Still not getting anywhere regardless of the changes I've made. Below is the "word vomit" that I have been documenting to try and see if something jumps out that is common with the good or the bad...

I understand this is a very common fail-mode for the symptoms I am seeing, and I tested this by setting up a go-pro that is fixed on the fuel pressure gauge while I am cranking. I have reviewed 20-30...

Ok, so I have an update and what I think is good news.....I have been just racking my brain against this problem for a while now so I decided to take another step back, and start checking things I...

I am willing to try anything so I will try this, this weekend and see what happens, but I thought about it, and if I do this essentially I will be starting over right? Meaning all the VE/MAF tuning...

I am running normal 93 pump gas yes. Any idea why the shop that tuned it would tune it for ~14.0 like it shows instead of targeting 14.7? I added injector PW for both banks and short term idle to my...

Sorry maybe I wasn't clear enough in my original post, but this has been checked a few times to say the least. My initial thought was this was a hardware issue, not a tuning issue so the fuel...

If the pump was failing or bad then I would think I would see issues with Fuel pressure, but its rock solid at 58psi on startup everytime.

I really have 3 options for starting problems right? You have the cranking VE table on the air side, the cranking fuel table on the fuel side, and the startup/cranking spark table on the spark side....

Whats up HPTuners community!

To be honest I have done a shit ton of research on this issue, but have yet to find a similar scenario to my current problem. To give some background I have a 2006...