These cars will run ONLY on OE and OEM sensors.In this case...it's Bosch. Delphi(aftermarket) will not work. It's better to use oe sensor from junkyard than any aftermarket ones. Maf connectors on these cars are prone to failure....even if pins in connector looks ok you will need a small precision s...

Blow through the valve. One way will flow the other won’t. Draw an arrow with sharpie in the direction it flows

Point the arrow away from an air pump

Point the arrobw towards a source of vacuum

...welcome!

Don’t forget to post back the white black convention here for reference!

(Oh my God Karen! You can’t just ask why purge valves are white!)

From another car make I found that the check valve convention is flow is enabled from white to black, blocked from black to white.

So

Air pump ..........white/black ........air injection


Engine vacuum........black/white.........purge valve or other vacuum motor

New developments. No new codes, but daughter reports the car would not start on first two tries this morning before starting on the 3rd. Also said drive back home felt like engine "stumbled" some during acceleration on the freeway. AC, lights, radio, etc. working. Her BF is guessing bad i...

I would pull the cap and check underneath it for condensation and/or oil. Very common for a cam seal to become dislodged and cause random and intermittent misfires. For investigating the MAF, try unplugging the MAF before starting the car. Does it run OK (it should)? If so, drive it around and see i...