First off, I know what KR is
, and how the PCM responds to it, and how it is sensed. My question is more in regards to what the major causes of it are. I know some
causes of it, and I am sure Jinx is still plauged by them:
1) Weak fuel pump and/or regulator. I also discovered something a bit disturbing on my car that could be related. For us 92-93 owners that have that mod done for the fuel gauge...you know, that diode that has to be soldered in? I crawled under my car one day and found several exposed wires going into the tank, one of which had a diode installed and all of the exposed wires had corrosion. When I get Jinx up on jackstands I will look into this further and repair as needed.
2) Bad or low-octane gas.
3) Faulty knock sensor. Is it improbable it will go bad? Yes. But not impossible. But irrelevant for me as I have a brand new one installed, and a backup still on the block (though not electrically connected).
4) Rattle cat. Not sure how much it affects KR, but I assume it would make the knock sensor pick up alot of false knock.
5) Bad tranny. I've seen it using the scantool and driving. It will start with about 3 or 4 (which is normal from my readings on here) expecting a shift to happen....but when it doesn't happen KR keeps going up until it DOES happen. I've been as high as 20
Though I am not sure if the tranny is the only culprit.
6) Hot air. Now that the engine is running near perfect (it still has a stumble when you burp the throttle when cold), once the trans is done I am going to work on an isolated air box and, uh, ditch the Ricerzone filter.
That'* all I can think of. If anybody knows other ways KR can creep in, please let me know.
Welcome, downwardly mobile yuppies, to the dawn of the Age of Nefarious.
1993 SSEi - FrankenJinx - dead and gone.
1994 SSE (136K strong) - 180* t-stat,HD alternator, most unequipped SSE on the club, XM radio, Kenwood CD/MP3.
2006 Chevy Malibu Maxx LTZ - Custom 2.25" manifold-back exhaust w/FM-80. Probably the only Maxx with this system.