CM 870 ISX

[Chamberpains]

Did you solder the sensor wires or use crimp on butt connectors to repair your wiring. If you used crimp on butt connectors, this could be some of your problem. Never never never use crimp connectors on sensor signal wires. This has proven to be a consistent problem with sensor wiring. Especially 5v signal wires. It causes irregular voltage spikes and drops.

Rawze knows better than me but 900° in pipe EGT's doesn't sound all bad when under load.

As far as the 30 psi boost, has anyone dyno'd or road tested under load to verify its only building 30 psi according to Insite? Have you verified your dash gauge is accurate? Dash gauges wear out and don't read accurate. Is the gauge getting its info from the ECM or is it a separate sensor with a pressure tube coming off it? If its a separate sensor with a pressure tube to the sensor or a seperate sensor you can hook a pressure regulator to shop air and send pressure directly to the gauge to verify its accuracy.