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  1. #1
    Fuel Injected!
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    Those calibrations are pretty much only done for only emissions, it's interesting to play with the O2 gains and watch an analyzer. I used to play with a mechanic's 5-gas (NOx/HC/CO/CO2/O2) and if you have one of those you can find some interesting things happening when you tune it. I now get to play with a Horiba 5-gas rack (same five results but the analyzers are better and a 5 second response time and 1 second T90 time). A cat sometimes wants some O2 storage/release to stabilize conversion efficiency although with a postcat O2 some cats work well with as low a storage/release as you can get away with - I have run systems with a wideband in the front and no toggling and great emissions. Put on a different cat with a different formulation and it needs to be hit with lambda steps of +/- 0.05 (10% total swing) to get decent emissions. You can drive yourself crazy looking at the numbers sometimes.
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  2. #2
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    I cut the prps back -3 at a time seams to have smoothed things out a little at lower operation.i made a history o2 voltage table when blm goes under 127 o2 goes to 0.993. I will get a data log in the morning and evening to see how much differents there is.trying to ajust blms at a guess between morning an evening data logs. if it uploaded this is my gq-4x
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  3. #3
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    how do you force open loop idle? I set my open loop at 65-90 centigrate afr to 14.8 its smells better but it goes closed loop pretty quick, I think 14.85-14.95 would work on this off the wall experiment , ever time I make a change I have to program a chip. I may have found a job going to see tomorrow[88 miles driving a day that sucks but I need the job] ,driving that far 3.5-4.0 gallons a day, takes a chunck out of what they pay. [I would like to do it on 2.8-3.2 gallons 87octain] is what I have been tunning on. when they changed to summer bleand knock counts started to increase.

  4. #4
    RIP EagleMark's Avatar
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    "Open Loop - RPM Threshold"
    Adjust here for Open Loop idle on big cam/low MAP idle engines.

    The Open Loop Off Idle RPM is the RPM threshold at which the ECM leaves open loop mode. To return to open loop mode the RPM must drop below Open Loop Off Idle RPM minus the Open Loop On Idle RPM

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  5. #5
    Fuel Injected!
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    I dindnt get that job I was tring to get,next day another place called me wanting to give me an interview, cant come know putting an axle in a mazda mvp can Monday, the job I didn't get is because no high school diploma or ged, emidely discolifyd me and I only applied for a mechanics helper, Monday may discolifey me cause iam 58 years old and don't look good, I am slow wise and do good work to the best of my ablity. if I get this job Monday its only 75 miles round trip.it will make a lot of financial differents an help other workers to learn [if they don't already know about some repair jobs] I kindof feel funning posting this here, I wanted to say the sst 512 chips do wear out,i have programged a couple 200-300 times a piece 1 of them will show it programmed but the data log says it dindt , not complaining, that is a lot of programming for a click earase chip !!!

  6. #6
    RIP EagleMark's Avatar
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    Don't say no high school diploma on application, just list the year you would have graduated, no one asks or looks.

    Can't hide your age, looks... or spelling...

    Your age and knowledge is an asset to some positions and may not be for others that they just want hard work and no brain, like a kid job... but they can not discriminate on age, so they use any excuse like GED.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  7. #7
    Fuel Injected!
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    I may well get the job that I have an interview for,the man I worked for, for 10 years had a lot of coustomers an [people that know him in the town I got the interview in] I sayed I was wise but not enough to run a bussnise, it takes all kinds to make things work an I know what I can do ,egale mark listin to this[ notodomis in grease cloths ] on old cars.

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