Check the Oxygen sensor - it is in a feedback loop to control the air fuel ratio. There is a step function going from excess oxygen (a few millivolts) to excess fuel (1 volt). They can fail in three modes: the zirconia can crack, the platinum electrodes can fail, or it can be a wiring problem between the sensor and the ECM.
Bill -----Original Message----- From: GTS-1000 Owners List [mailto:[EMAIL PROTECTED]] On Behalf Of Kevin Hawkins Sent: Thursday, August 01, 2002 2:06 PM To: [EMAIL PROTECTED] Subject: Re: Injector Problem Cheese and crackers Tom! I've been around GTSs for a long time and have NEVER heard of this problem. I would first check the obvious, sparkplugs. What color are they? They've GOT to be black if you're running that rich. The bike should also SOUND very different running that rich. I would do several things. 1. Replace the plugs 2. Check the plug wires (they screw into the plug caps) and trace them back to the coils (ignitors). 2. Check the air filter and air box for possible obstruction on the intake tracts. 3. (Access the ECU and write down the position of the potentiometers) Rotate the pots on the ECU to the 7 o'clock position and crank it up. Rotate the pots clockwise to the 5 o'clock position and crank it up. Return the pots to they're original position. Again, the engine has GOT to sound very different running this rich. Also, what are the chances of ALL FOUR injectors going bad at the same time?? I don't think so! Something else is amiss here and I bet RSRBOB can get to the bottom of it! Kevin Hawkins // Greensboro, NC [EMAIL PROTECTED] http://www.kevinhawk.com Y2K Kawasaki ZRX1100 //'93 Yamaha GTS1000 //'85 FZ750 Don't suppose anyone's had any problems w/ their fuel injectors? Just came back from a trip to Oregon last week.... once I hit the 5 south of the SanFran turnoff, I spent most of the next 200 miles averaging 95-100 at a clip to just before the Grapevine (and I was in the slow lane!)....... Anyway, I went from averaging just over 200 miles / tank to 70 miles .... sucked up an entire tank full from Sylmar to Fontana (at normal speed).... Yes, apparently sustained high speeds did not make for a happy GTS, and now my mechanic thinks the injectors are shot... at $192 each <ouch!> .... It's only got 18,000 miles (bummer, no warranty this time)... Anyone out there w/ a similar experience? Or am I the only lucky one to have it happen twice (similar problem on my other GTS re: rapid fuel consumption, but damned if I can find the paperwork from that job six years ago, though I'm sure I didn't have to replace the injectors). Thanks, -Thomas 94 GTS =========================== Thomas H. Keyworth http://www.keyworth.net http://www.district37ama.org http://www.jpt-promotions.com http://www.wallyscycleworld.com ===========================
