RE: Checked WOT and ECU on 5kcstq...

[glen <gpowell@acacianet.com>]

I've recently developed an intermittent CIS FI prollum with the 85 ur-q. After about 30 mins of perfect operation it starts going back and forth between full rich and full lean. I have a dual-mode LED meter that displays the O2 value and also the % duty-cycle of the 6th injector I run for on-boost mixture enrichment. What I did is simply moved the % duty-cycle input from the 6th EFI to the control pressure frequency valve to monitor its operation. The same could be done with the WG FV, if you have one. You could even run wahrs from each to a switch mounted inside the cockpit to select the desired sensor on the fly. Could be a good debug aid and can be used to check the WFO switch while on the fly as well. The jury is still out on what is causing the above ur-q CIS FI prollum, may get a chance to try to reproduce the prollum again this weekend now that I have the FV connected to the display.....

-glen


Thanks to Orin for suggesting that I check the WOT switch on the 212k-mile
5kcstq that I drove, which felt a little low on power. The switch is fine
(at least in the steady-state, wide open test) and I do not notice any
intermittent driving behavior. While driving the car this time, I made
sure to really accelerate, and the boost gauge went to 1.2 bar and stayed
there.

I checked the ECU fault codes too and got a 4444--no problems. Thanks to
Scott Mockry's pages for the how-to on that.

Again, the car isn't dead or anything, but it doesn't feel as fast as I
believe other 5kcstq's do. Let me know if I should check anything else, or
otherwise I'll plan on shopping for a different 5kcstq. But this one does
have the Fuchs wheels...

- Wallace White
  seeking 5kcstq