I've been debating on making this thread, mostly because I wanted to tear down the engine first to figure out what really happened. I received my car back from the tuner couple of Fridays ago with it runny sketchy. Not long after driving it, I got a check engine light saying it was running lean in both banks with LTFT in the 20s. I called the tuner and he told me he forgot to turn off some codes and that's probably what it was. After clearing the codes, the car did run better (like when I picked it up) but still wasn't what I expected. He told me it was a really conservative tune and I could put my foot into it without worrying but later (after the fact of the car failing) he told me he didn't know I was road racing it. Which I def clearly stated what I was doing and why I wanted my tranny a specific way and why I chose the Procharger over the maggie. He also wasn't up front with the fact he has never tuned large injectors on the e38 PCM.
At the track, I experience inconsistent power and I should have just taken it off, but lesson learned. Here's the only session I ran, with the car losing power (and sputtering). At the end, I wanted to run around one last time to see if it was due to the codes (which cleared from turning the car off and on).
After the run, I found my dipstick blown out of the engine and had to put it back in. The oil pressure gauge remained solid at 3. I met someone at the track which had HP Tuners and he pulled the tune for me and took at look at how it was running. He mentioned it didn't seem right, especially with the LTFT being at 20+. I was getting all sorts of codes, MAP, lean codes, and later, the dreaded misfire.
My brother pulled the plugs and found 4 and 6 to be almost completely gone (exploded). Compression check shows 170 in 4, and 0 in 6. Another piston with a good spark plug showed 180. It looks like I have coolant in my oil and oil in my coolant.
I asked BlueGoat06 to look at the tune and he made a post on HP Tuners here
. (Which the tuner found less than 12 hours after being posted). Now, I'm not blaming the tuner, anything could have happened at this point, just giving the story.
The reason I chose going to a shop is to identify possible problems my mechanically ignorant mind might have missed. Later he told me the platinum spark plugs shouldn't be used (which he said he checked the spark marks earlier to make sure it wasn't running lean - but didn't think about it being platinum then). He also said he felt the head lifted with the amount of boost I was running (9PSI) and caused coolant to shoot into the piston making the spark plug explode.
Moving forward, I will be tearing the heads off the car this weekend and sending them into a machinist I trust. I've already contacted Patrick G to have him tune and pick out the cam for my next setup. It might just be a head gasket... in which case, I will be replacing the vavles, springs, etc... and possibly the cam. If the piston ring let go, I'll be boring the motor out and switching to forged internals.
In any rate, drove my car for less than 200 miles, less than 24 hours, and have owned the Procharger (installed even) since August. At least race season is over and winter is here... lol
2008 G8 GT - Procharger 14PSI D1SC, Squash Double Pumper & Fuel Rails, ID725, ZR1 Map, Port & Polished w/ 4 angle heads, Forge 9.5:1, Pacesetters 1 3/4" LTH (CAT-less), Flowmaster Super 44s, X-pipe, Brembos, 3200 FTI Triple Stall, EBC rotors & yellow pads, Motegii MR120 20x9 +38 275/30s wheels, Pedders Coilovers/Swaybars, BMR Strut bar, Pat G cam/tune!
New: 632/530 Mustang Dyno