would you know what sorts of mods?
my understanding 6870 has one injector driver whereas the 7427 has 2 but resistance of injectors would proabably be different
would you know what sorts of mods?
my understanding 6870 has one injector driver whereas the 7427 has 2 but resistance of injectors would proabably be different
Last edited by Aholt91ss; 06-16-2013 at 05:09 AM.
There's a couple resisters in PCM that need a solid jumper for 8 injectors. The Memcal mod with a wire when you read docs is not needed. Take a look in this thread for links to wiring and a Zip file with all that needs to be done to convert 97427 TBI to MPFI:
http://www.gearhead-efi.com/Fuel-Inj...Information-OD
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
That's what I said but I guess it did not come out well?
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
so the only modification is the 2 resistors replace with solid wire and go in tp and set flags
and repin the connectors do i need to wire each of bank of injectors in parralel or leave it alone
and probably have to run a map sensor speed density instead of maf
Last edited by Aholt91ss; 06-16-2013 at 05:22 PM.
How is that the jumper is not needed?
From my understanding this puts the PCM in 8 cyl PFI mode on the hardware side, just like is needed in other ECMs for MPFI.
I think for simplicity reasons in this case, I would look at using the '165 ECM and $6E or swapping to speed density using a '7730 and $8D.
Back when I tried running a '7427 PCM without the E-trans it didn't run as well as with the E-trans. Same vehicle, just a trans swap from a TH350 to 4L60E, no other changes, other than loading a stock bin to the ECM to re-enable trans control and it ran 10 times better. I made all of the recommended changes to run a non E-trans and was just never satisfied without how it ran until the trans was swapped. It was always the intention to swap the E-trans in, just did the EFI swap first.
The man who says something is impossible, is usually interrupted by the man doing it.
the local pick a part only has one 91 camaro that stripped to bare nothing and i already have a few 7427 pcms
the pcm only controls lockup doesnt it? also i dont have vss
Last edited by Aholt91ss; 06-16-2013 at 05:58 PM.
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