Bench programming a LT1 PCM ?
This is a winter project, any day now up north here?
Does any have information or links to Re-Flashing an LT1 PCM on the bench? I have bench. :laugh:
I've done it in my car with WinFlash. Made adjustments to Bin in TunerPro. Reflashed through ALDL port.
Got a couple spares in case I brick one, also check charging system on car, batterey voltage car off, load test and if all is well I leave a small batterey tender on the batterey. Instructions say no chargers but this is a tiny charge to keep topped off on like a harley in storage. That what I bought it for 15 years ago. I also start reading and flasing with full charged laptop batterey. No charger! Done mine 5 times now with no issues!
Would it be as simple as running ALDL lines and power lines to the PCM? Probably be nice to get some PCM pigtails, but so few wires and I think you only use 2 plugs? I have wiring diagrams for all if I have not added them to the library.
1 Attachment(s)
Re: Bench programming a LT1 PCM ?
I'm sure the LT1 PCM can be bench flashed, similar to the way I bench flash the LS1 PCM. Using the LT1 PCM schematic you will need to figure out what are data pins, ground, power (battery / ignition on) pins.
dave w
Re: Bench programming a LT1 PCM ?
Just doesn't look like a lot of wiring to do!
Re: Bench programming a LT1 PCM ?
I am still new to all of this and have lots left to learn, so forgive the noob question. But if all the flashing is done through the adld plug, whats the need/reason to remove the pcm from the car just to re flash it? Or is there a limit to what can be flashed with it in the car, and it need to be removed and plugged into something special to do a diffrent/more in depth re flash?
Re: Bench programming a LT1 PCM ?
If the LT1 and LS1 (and anything OBDII) are not done properly they turn into bricks! Having a security alarm go off during a flash can cause a brick! Garage door openers can cause them to become bricks... there are some tricks that work to restore them some not! My auto level DynaRide suspension came on during a reflash and I nearly flipped!!! Now I pull that fuse! If I had a low batterey or not running the tender on a known tested fully charged car batterey that could have bricked it!
On the bench I run off a car battery that runs a tender (like in my LT1 thread) and have 2 battereys for my laptop. I always read and flash on fresh full charge, no charger. This keeps the narrow reflash voltages in check. Even if my electric power goes out during a reflash on my bench I have no loss!
You can also flash one for someone who needs many things changed before start up. Or may need adjustments for cam. Makes it way easier. I like doing conversions from stock harness to easy hook up on conversion motor, then adjust chip as needed for EGR or no EGR etc... then I run them on my bench and know they will run on the car. And always have! Long winters in Idaho so I get it all done on bench in a nice warm shop.
Re: Bench programming a LT1 PCM ?
So basicly they are very sensative? Or only when flashing?
So there is a narrow voltage range that has to be maintained when flashing, and if something else comes on or goes off that could cause the voltage to change, it fries the computer? If thats true I had no idea those were so sensative. I can see the reason for concern.
Re: Bench programming a LT1 PCM ?
No they are very robust PCM!
Only during the reflash everything has to be right.