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  1. leaking fuel pressure regulator

    leaking fuel pressure regulator
  2. injector pulsewidth (the output that your...

    injector pulsewidth (the output that your mechanic is questioning) is easily checked by comparing the duty cycles of all the injectors. if you suspect a bad output (in this case injectors) that...
  3. there's constant power to the injectors. the...

    there's constant power to the injectors. the power comes from two independant circuits from the fuse block (one for left and one for right). the ECM closes the ground to each injector to fire it. ...
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    just for the hell of it swap ecms and see if it...

    just for the hell of it swap ecms and see if it behaves itself on your new (working but beat up) car
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    yeah would need a new log format, the log was...

    yeah would need a new log format, the log was never designed to hold anything but real datastream packets in their entirety. plus that'd be a really weird thing to add to the recorded datastream as...
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    thing is.... the knock counts are refreshed many...

    thing is.... the knock counts are refreshed many times per second second. if it was in fact a datastream error the knock counts should go right back down. if it was interference on the bus you'd...
  7. only the wrong adx/ads would cause a problem. ...

    only the wrong adx/ads would cause a problem. the xdf and bin you have loaded have nothing to do ecm communication (they could be for a different car and you'll still get your data)
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    8192 baud ALDL was pretty good for its time...

    8192 baud ALDL was pretty good for its time compared to some other stuff out there

    it's all about the tools and transitions. automakers dont want every auto shop to have to buy a new tool every...
  9. if one bank is rich it’s probably an injector or...

    if one bank is rich it’s probably an injector or two. usually i would swap the lefts and rights to see if it follows.. but also the fuel pressure regulator could be leaking through its vac line? ...
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    large amounts of comm errors definitely aren't...

    large amounts of comm errors definitely aren't normal affair for datalogging but corvettes do have a lot on the aldl bus, maybe a device is waking up and interfering with communications.

    if it...
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    i've never tested the blm locker on corvette bins...

    i've never tested the blm locker on corvette bins but the code around BLM stuff seems the same.

    try without the BLM locker (it's not THAT important, i'd rather have it not trimming to stoich at...
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    why are we talking about performance mods for an...

    why are we talking about performance mods for an engine that is obviously broken or mis-tuned in some way?

    just fix the thing

    also i dont care what the dyno reads vs some other dyno.. huge...
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    you know looking at your screenshots, maybe your...

    you know looking at your screenshots, maybe your power enrichment table is just too lean. did you develop that table with a wideband? there's knock at WOT too. compared to stock bin you're like...
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    well with that torque graph and intermittent lean...

    well with that torque graph and intermittent lean id expect a miss under load to be causing this. an engine that is quite lean at wot is going to peg the o2 sensor low. all you know now is that...
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    just fyi and so we're clear a 'normal' log would...

    just fyi and so we're clear a 'normal' log would be both o2 sensors pegged @ high voltage during the green area

    the reason your o2 voltage is dead low in between those events is the dyno is...
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    hey glad you're enjoying my software a...

    hey glad you're enjoying my software

    a preliminary glace shows something seriously wrong with your fueling or maybe you have a miss at WOT. the eehack log analyzer is not wrong here. the reason...
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    the maf isn't really good with air density, im...

    the maf isn't really good with air density, im sure it uses barometric pressure to tweak fueling in some way in MAF mode (although i haven't looked at the code). either way ~1 KPA of baro difference...
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    so the only difference between the two snapshots...

    so the only difference between the two snapshots above was humidity? no other engine modifications?
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    before we look at logs, what's been done to your...

    before we look at logs, what's been done to your engine?
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    just for fun lets force your IAC into operating...

    just for fun lets force your IAC into operating range. crack the throttle plates open until cold start yeilds iac counts <160 and see if things improve. the air will be less even than a properly...
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    stock ecm will be just fine. just buy what you...

    stock ecm will be just fine. just buy what you need from moates. it wont need a ton of tuning.

    manifold conversion itself might be bitchy. you realize the lt1 is a dry manifold, right? you'll...
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    of course, but a bit complicated for the new...

    of course, but a bit complicated for the new tuner. it's not just a matter of setting a flag if some variable exceeds some constant. my attempts to do this with $EE were buggy at best. it's pretty...
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    open loop can be great. it's nice to be able to...

    open loop can be great. it's nice to be able to forcibly give an engine 'what it wants' rather than giving up that control to a feedback sensor.

    some engines just don't take kindly to closed...
  24. Thread: baby v8

    by steveo
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    i'm pretty sure you'll want the 4.3 knock module...

    i'm pretty sure you'll want the 4.3 knock module too. i don't seem to have an L99 bin in my collection, but do you want to check?

    http://fbodytech.com/bin-files-2/bin-files/

    download all the...
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    no it doesn't have to be running. again, you...

    no it doesn't have to be running. again, you probably have an open circuit. your o2 and your ecm are not connected. there is no way a real o2 sensor would read anything but HIGH or LOW in a...
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