Hey there folks,
If you don't want the entire rundown, even though I feel it all important information, jump down to the last paragraph.
So my time for emissions is coming close, and I'm tired of cheating my way through by leaning out at the AFM before testing in HOPES that I cranked it back enough. It jumped from about a 1/4 turn to 3/4 turn last year, and ended up just BARELY passing, limit 1.20 CO and she landed there on the spot. Interesting considering my first run passed like a charm 4 years ago after buying the car with blown head gasket and only replacing it.
I've come to a sudden realization in the past week, and would like to get some insight if possible. I've changed plugs/wires/distributor, manifold gaskets, valve cover gaskets, cleaned entire intake, scoped around for vacuum leaks, new O2 sensors, new timing belt (which was trash), fiddled with valve lash, TPS, new AFM, tested fuel pressure regulator/injectors (not sure about importance of damper, but diaphragm is definitely shot...thoughts?), and set the...wait a minute...the timing.
I never put much thought into it, but every time that I've set the timing (maybe 30 times in 3 years), I've never noticed any reason whatsoever to jump Te1 and e1. It doesn't change a thing, jumper or no jumper. The computer isn't doing any compensation! Explains the shudder I'm getting from time to time.... So my thoughts are knock sensor, however, I'm not tripping any codes after resetting the ECU and doing timing two weeks ago. Come to think of it, I've never gotten code 52.
Long story short, no fault codes, the car isn't in limp mode, diagnostic jumper doesn't do anything for setting the timing, and there isn't any compensation happening. It does like to bounce up and down about 2 degrees on either end, 8*-12*. :nono:
Any knowledge and info is greatly appreciated!
If you don't want the entire rundown, even though I feel it all important information, jump down to the last paragraph.
So my time for emissions is coming close, and I'm tired of cheating my way through by leaning out at the AFM before testing in HOPES that I cranked it back enough. It jumped from about a 1/4 turn to 3/4 turn last year, and ended up just BARELY passing, limit 1.20 CO and she landed there on the spot. Interesting considering my first run passed like a charm 4 years ago after buying the car with blown head gasket and only replacing it.
I've come to a sudden realization in the past week, and would like to get some insight if possible. I've changed plugs/wires/distributor, manifold gaskets, valve cover gaskets, cleaned entire intake, scoped around for vacuum leaks, new O2 sensors, new timing belt (which was trash), fiddled with valve lash, TPS, new AFM, tested fuel pressure regulator/injectors (not sure about importance of damper, but diaphragm is definitely shot...thoughts?), and set the...wait a minute...the timing.
I never put much thought into it, but every time that I've set the timing (maybe 30 times in 3 years), I've never noticed any reason whatsoever to jump Te1 and e1. It doesn't change a thing, jumper or no jumper. The computer isn't doing any compensation! Explains the shudder I'm getting from time to time.... So my thoughts are knock sensor, however, I'm not tripping any codes after resetting the ECU and doing timing two weeks ago. Come to think of it, I've never gotten code 52.
Long story short, no fault codes, the car isn't in limp mode, diagnostic jumper doesn't do anything for setting the timing, and there isn't any compensation happening. It does like to bounce up and down about 2 degrees on either end, 8*-12*. :nono:
Any knowledge and info is greatly appreciated!
