Ok so I had my car tuned two weeks ago by a well known tuner. Car felt great on E85 with and FP black holding 35psi all the way with around 11.7-11.8 AFRs just under 600hp. I came back into town and took someone for a spin and it felt amazing. So I parked the car and went to take it out last weekend and all of a sudden it is running real rich (9.7-10.2) in wot. Outside of WOT with just idling and crusing the car runs great. All the trims look spot on and I do not see an issue. I have done a boost leak test now 3 times and everything is solid so I have ruled that out. Just before the tune we installed brand new plugs and I pulled those and they all look the same and look almost brand new. The car is not throwing any CELs and my scan came up empty. In 1st gear rolling into WOT the car breaks up badly and doesn't want to boost at all, in 2nd and third the car will build boost but definitely is running very rich and doesn't feel smooth or powerful at all. I have a noncdi Sparktech unit on the car currently and am really at wits end in trying to figure this out. The car sat for four days, and suddenly started running horrible. It is on the same tank of e85 as before and I have not changed a thing since it was parked. I am running out of ideas and hope someone can give me thier thoughts. Any help is appreciated at this point.

 

That sucks! could it be a bad coilpack? lmk if you wanna borrow mine and test it!

 

Thanks man! I may be hitting you up on that offer. I am trying to rule out everything at this point.

 

Up for the evening crew.

 

Log added for reference as a 3rd gear roll into WOT. One thing I noticed is that for some reason my LOAD seemed to be logging correctly and then bugged out. Thoughts? Another thing is it almost just seems the AFRMAP log is showing the reference point in the 8's which just seems low to what I am used to. Should it be as simple as leaning it out? It doesnt make sense when the tune has not changed nor has anything else in the car that I can find to make it richer.

 

I had the same issue the last week, just before boost 30 psi, the reason... the coupler of the licp had a big hole! make a boost leak test.

 

I know the first post is long but I have already done a boost leak test three different times. No leaks at all.

 

I's there major climate changes or temp changes from when and where the tune was done?

 

Nope. Chicago to Detroit. Has been 90s and hot the entire time.

 

Huh interesting I would suggest switch back to stock coil packs and see I'f that makes a difference maybe one of the coils on the sparktech are going out! Also varify the boost levels are consistent to what they were at the Dyno day more or less boost will make large changes even I'f it's a small amount! Gl man hope you get it figured out!

 

Thanks man I may give that a shot. The boost is just about the same around 1psi less but that wouldn't obviously make it that rich.

 

Do u still have ur egr?
https://www.evolutionm.net/forums/ev...idle-afrs.html

 

I have deleted the EGR and it runs great at idle, cruise, and low boost. The AFRs and trims seem to be spot on outside of boost.

 

Lunchtime Bump

 

oooops, should have read more. Ninja edit