15+ Year Contributor
- Jan 25, 2008
The has sat for a year. It's a 97 gst 7 bolt. The changes I've made during the rebuild was .020 over 8.5:1 pistons to .040 over 9:1. Switched to a 99 block with new bearings and arp everything. I'm using an AEM standalone. I have fuel and spark. My wideband goes lean and stays there (17.5+). Won't idle, will run if I hold it at 2k+ rpms. Won't rev past 5,500 rpms. I've tried to give it more fuel, but it would only hit 16 on the wideband with 3x the fuel. It has around 15 in hg of vacuum. No boost leaks either. I've ran out if ideas of what the issue is.