Every thread is a great read. I need some help: I pulled a CEL P2187 and ignored replacing the purge valve solenoid. This past weekend I'm going down the highway and noticed every time I took my foot off the accelerator the RPMs dropped to zero. I stepped on the gas and it shoots up again, but zero when I let go. I feared the worst and parked the car. I tried to start it up again and it turns but won't fire. I replaced the purge valve and spark plugs but it still won't fire. This may be caused by a number of things so any help would be appreciated.