Could still be the EGR. It's controlled by electronics (that little square box sitting about 8" closer to the firewall than the valve its self). Is it plugged in? Are the vacuum lines from it to the valve OK?
Who made your smog chip?
mine was a hollowed out cat...went back and forth several times trying different things..emissions chip didnt help me
The 'actuator' is plugged in and I replaced the vacuum hoses to it about a month ago. I'm thinking of just replacing it. It's the only other think I think it could be. TurboTweak made my emissions chip so I don't doubt the chip. I posted all my readings on their forum and he said 99% of the time the high NOx is due to egr system.
Could you guys tell me what this pinched hose is for? I found this last night, below the vacuum block on the bottom of the intake. Runs back underneath the intake. It looks like it hooks into the other side.
On passenger side of intake
Finger on it
i was!!!!!!!!! seeing as it didn't look as if it was touched, and it was gutted from the top, looked originalAnd you're surprised?
Darnit! O'Rielly's can't tell me which egr vacuum solenoid I need. They sell two:
List: EGR Vacuum Solenoid - 1987 Buick Regal | O'Reilly Auto Parts
Can you tell me which one? The EGR213 or EGR222? Or an OEM part# would help me out.