HI All -
Just getting the car back together. I thought I had a blown head-gasket, but it ended up being one hell of an air pocket. Lesson learned, use a vacuum style coolant bleed / refill tool. Best money I've spent on a tool in a while.
Ok,
2003 LQ4 stock minus listed mods
317 Heads
1 7/8 Hooker Headers and 3" exhaust (no cats)
Bullet Cam 226/234 112 LSA
T-56 Magnum Transmission
I've been reading a lot and download a bunch of tunes to see if I could start to see what looks right or normal. I've borrowed a spark table and a VE table from another persons tune that had a similar cam. Mostly everything else I tried to copy from a GTO file, or referenced internet wisdom.
-Car idles well, starts well lean, then after about 30 sec - 1 minute it goes from 16 AFR to 10-11 AFR. On a warm start it's usually 15-16 AFR
-During driving while the engine is still warming up I saw mostly 12-13 AFR (not sure if HP Tuners is logging my wide band correctly, looks to be displaying leaner than what the gauge says at times)
- Once the engine had warmed up, the AFR dropped to near 16.00
- During a pull my AFR read a steady 15.3
- A problem I'm having is when I come to a light and stop, or just prior to stopping, the engine wants to die, and usually does if I don't keep my food on the accelerator pedal . My wideband goes to near 10.0 AFR, and the idle drops below my commanded 850 rpm, I noticed once it was 550ish. Is this DFCO maybe?
All in all I'd really just like to get it closer to 13 ish AFR. Its a daily driver, would like the stop light / low speed stumble corrected somehow, and the slight surging I have if I hold a gear at low speed in the neighborhood.
Help, guidance, or reference to more reading would be great. Thanks!
Alex
1 bar maf 6.0 (Monte ) v2.hptv2 monte 1st trip from cold start.hplv2 monte 2nd trip.hpl