I've got build 467 and can't read the pcm on the Envoy I6 nor a Trailblazer I6. Am I missing something? Jesse is offering tunes for the I6 so I must not have downloaded an update or something??
Just downloaded the whole shaa bang and it still won't read the PCM.
What error is it giving you? A dumb question, when you select read pcm, are you selecting the il6 computer at the top?
"If you can leave a black mark on the pavement, from the exit of one corner to the braking point of the next one, you have enough horsepower."
Thanks for the reply, but I followed your earlier post and uploaded the new updates into EFI Live that you provided in that link. All is well now.
-john
The Trailblazer turned out to be a 5.3 not a I6Originally Posted by wait4me
. The Envoy is at the dealer now getting a new PCM. I know the guys there and asked them to reflash the factory cal and the TechII wouldn't read it either.
if the car works, then the pcm is not bad.
Normally it is just a blown fuse on the pin 58
"If you can leave a black mark on the pavement, from the exit of one corner to the braking point of the next one, you have enough horsepower."
Good info I'm going to call them and see if they will give it to me as long as they think its non functional
This is an old thread, but I thought I'd chime in with my calibration results to date. I made all pulls in 2nd gear to keep the wheel speed from getting out of control and the T.C. was unlocked during all pulls. Power went up from 201 RWHP/203 RWTQ to 210 RWHP/208 RWTQ and the biggest improvement was the area under the curve and the smooth, un-interrupted power delivery from 2000 RPM all the way to 6100 RPM. What a positive difference!
I've built Spark and KR maps in the scanner to dial those tables in so no det was present *anywhere* in the powerband. Now I can put 87 octane fuel in the truck for normal commuting around town w/out any det events and when I want to pull our 6'x12' enclosed ATV tralier fully loaded, I put in 93 octane fuel, for which it will pull it around w/out det anywhere either, no matter what the outside ambient temps are! WooHoo, this thing is how it should have came from the factory.
I did find out that this engine likes a 12.4:1 AFR when pulling a load for best det-free power and it seems to like that same AFR for the 87 octane fuel also- all this and it still gained 1.7 MPG average.
Fuel trims are -2 to -5 everywhere and it starts/runs a LOT better than it ever has before.
I'm a happy camper now and my wife thinks she has a Top Fueler for a DD now! Heh..heh...!
-john
fyi, good work.
Oh...BTW, the factory setting of PE engagement and it's related algorythims are a complete joke for anything related to power or efficiency and I'm still trying to figure out what GM was thinking here when they did it this way...
It seems as if they are purposefully staving off the PE mode with a multitude of parameters that need to be met/agree to improve fuel economy I'd guess, meanwhile the engine stays pinned at stoich during heavy load, for which det. gets progressively worse anyway due to the lean condition under load!! Then, they decide to flood the engine with EGR in an effort to cool the combustion process down to control at least *some* of the 4*-6* of det. that consistantly occurs during this mess.. Finally.....after 85% engine load and a million parameters that are met, PE kicks in~ but by then, the full throttle event from the driver has probably ended and everything starts back to zero all over again. Stupid...just plain stupid design.
Once I figured out where the engine liked PE to come in at (about 57% engine load or so) and targeted both spark curves to work with the richer fuel mixture, the power went right up and the det. events went right down! The fuel economy improved too, which was a welcome side-effect.
There were a number of silly tables set up like this from GM throughout the PCM calibration that I massaged for improved all-around performance/economy and it seems to be the sum of all those itty-bitty refinements that led to the greatest overall improvements I guess.
-john
"...and then they decide the cats are overheating so they dump fuel..."
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