I have a 1982 S10 that is LQ4 swapped. I had it running and driving for a year and then installed a m90 supercharger. after the install the truck starts and runs for a second then dies. I cleaned the LS7 maf and it did the same thing after. I had to change a lot of the vacuum lines and their routing so they are all routed to the top of the supercharger. I have an oil catch can and have the 2 valve cover ports going to the catch can and the top vacuum port going to the other catch can port. I don't know if it matters but I took the pcv valve out of the supercharger. I need to check for voltage at the mass air flow sensor but I can see that it's measuring cfm in the scanner. it doesn't run long enough to get much in the log file. marshal corwin 1982 S10 LQ4 timing lowered to 15.hpt