P1287 Help?

[Dfraney]

As title states, I have a CEL for P1287(static, open circuit). Car had a ton of cels when I got it but I’ve been fixing things, can’t seem to track this one down though.

Ohmed out the N249 and it seems within spec. Some forum posts said 28-30ohms, mine was reading 25ish. Voltage to the connector was 11.5v. Fitting a new DV on tomorrow and I might as well pressure test the N75. Anything else to look at? Most of what I read has said it’s an issue with the N249. Car has no boost under ~2300rpm and once it spools it’s still slow. Bone stock.

[Danisson]

Been working these days on the N112 and N249 solenoids (same part by the way); freshly painted the mounting plate, cleaned and polished the solenoids themselves, new screws, new silicone vac lines and all that great stuff. (post incoming ;) Measured their impedance while I was at it and both were ~ 28-29 Ohms.
To diagnose a faulty N249 though, run a vacuum line form your DV straight to the intake manifold where your N249 gets its vacuum from. Loop the N249 nipples with a line and see how the car behaves.