Stock 01 GTP sedan. 105k on motor, fresh trans from triple edge, engine cover removed, spark plugs are ac delco 41-601 gapped at stock specs 0.60" I believe.
I just got a scangauge II a few months ago. I am getting some KR and want to know if it is something to be worried about and if so what can be done.
I drive from 4400 to 6000 ft elevation with lots of hills. I use 91 octane with up to 10% ethanol content. I tried 2 bottles of octane booster with no change.
Here is what I typically see on a long hill climb sometimes higher numbers like 3 kr but I didnt get pics of it then.
1.8 KR @ 3.0 psi, 12 deg ignition timing,
0.4 KR @ 2.4 psi, 15 deg timing
1.2 KR @1.5 psi, 17 deg timing 2800 rpm 3rd gear
0.5 KR @3.0 psi, 12 deg timing, 197 deg coolant
Above readings at 2800 rpm,80 mph climbing a hill part throttle, 194 coolant temp 3rd gear
1.2 KR @1.1 psi, 15 deg timing, shifted to 4th/overdrive 2300 rpm 80 mph, 197 coolant
At full throttle I might occasionally see 4.0 KR and 6 psi but not sustained.
Should I be concerned about fueling like an old weak fuel pump-rewire it? Wrong spark plugs or gap? Try a downpipe?
