4.8 LS swap into 1988 c4 corvette

[edcmat-l1]

Spark, or more precisely, advance, might not be showing up because it's not selected. Do you know how to add or remove channels?

It's also possible the PCM needs to be repoled. Go to Documents/HPTuners/VCM scanner/Vehicles and empty that folder. That will force the scanner to repole the PCM.

[Corvette Chris 39]

Spark, or more precisely, advance, might not be showing up because it's not selected. Do you know how to add or remove channels?

It's also possible the PCM needs to be repoled. Go to Documents/HPTuners/VCM scanner/Vehicles and empty that folder. That will force the scanner to repole the PCM.

Ok I?ll check that when I get off work

[Corvette Chris 39]

Post the log.

If it was me though, I would get the wiring diagram for my donor ECM and check every connection, both for where it lands and for proper connection.

my harness i bought online. im checking it all out soon as i get my little girl to bed

[edcmat-l1]

Everyone buys stuff "online" that's way too vague. Online from reputable American company or online from Amazon, Ebay, etc.?

[Corvette Chris 39]

Everyone buys stuff "online" that's way too vague. Online from reputable American company or online from Amazon, Ebay, etc.?

so my harness i bought on amazon because i didnt have alot of money at the time and also because this was my first ever build . Ive learned alot of do's and dont's from this build and can say you do get what you pay for ! Im ,ooking over my pin placement now to see if that might be the cause becaus alot of people from the reviews ive read have had the same luck as me . their wasnt ny reviews at the time of purchase but there is now and they have had similar problems. Its all a learning experience and im grateful for how far ive actully came . i couldnt have done it tho without yalls help here . so thank all of you guys or gals for everything youve helped me with so far it was very nice
ght on amazon

[gtstorey]

I would probably check a new OEM harness for correct connections before I installed it. I don't know that I would trust any of them.

[edcmat-l1]

Save yourself more headache and buy a decent harness from a company that can answer your questions.