| Author | Message | ||
     Akbuell |
The '01 X-1 was getting difficult to start, and I was seeing a slow return to idle. Did an ECMSpy tune-up (Still amazed that a tune-up Does Not involve feeler gauges, timing lights, ect.) and went for a 150ish mi ride to the Dragon and back. The TPS reset and AFV to 100 did wonders for starting and return to idle, but the engine felt 'soft' or 'heavy' at throttle inputs. Along with a vibration that is almost (but not quite) a miss. An ECMSpy overview this morning shows the AFV at 95 (was at 85 prior to the reset). I'm thinking the rear injector may be partially clogged or leaking, causing the O2 sensor to read rich in closed loop. No trouble codes listed in ECMSpy. Recent intake gaskets, and I discount an intake leak due to the drop in the AFV. Thoughts ??? | ||
| Two_seasons |
Injectors should have a nice spray pattern. Can be checked using a vise, grocery paper bag (sack for you west coasters), and a 12VDC, battery works fine. If either injector's spray pattern varies much from the other, replace both as both have same time on the bike. About $120 for both. | ||
| Thejosh |
Sounds like an intake leak to me | ||
| Akbuell |
Two - Thanks; may get back to you on particulars. Would be good to know how to do a bench check at home. Thejosh - Just replaced the intake seals, and wouldn't an intake leak cause the AFV to climb above 100? And Doh, I can be such a maroon - There is a simple check for leaking injectors in the factory service manual. Will try that and let folks know how that goes ..... Thanks much for your thoughts and ideas, please keep them coming, Dave | ||
| Firemanjim |
AK,you are correct in assuming intake leak would skew AFV the other direction. You have a rich spot in Learned Fuel area,or if the 85 is a new symptom most likely culprit is engine temp sensor as this is the only item that will add fuel. | ||
| Akbuell |
FMJ: Good info to have, Thank You. FWIW, the eng temp readings responded appropriately when I did the TPS reset. Update: Pulled the spark plugs. Rear plug had hints of tan, showing fair fuel/air mixture. Front plug was white, definitely lean. Sec 4.41 of the service manual has a procedure to check the injectors. Throttle wide open, then key on for 2 sec then off for 2 sec. Repeat five consecutive times. Replace injectors if evidence of raw fuel in the intake manifold. I propped the throttle open, then looked at the injectors w/a mirror and light as I cycled the key on and off. Front injector was OK, a dark stain (small) spread around the rear injector. So I guess it was/is 'drooling'. Leading to rich mixture or poor combustion or both, causing the O2 sensor to subtract fuel. Looks like new injectors for me. Will report back once installed and tested. '01 X-1, 23019mi. | ||
| Firemanjim |
You can send them out to get cleaned and flowed. We use RC Engineering in SoCal--on Higgins Ct. LOL. Reasonable and fast. Sent a bunch of X-1 injectors to them. | ||
| Akbuell |
New injectors on the way. Will probably send these out for a refresh; be nice to have a set 'in stock'. With 2 X-1's, I may need spares, and there may be a Badwebber in need in the future ..... Since the 'drooling' injector was the rear, and affecting the AFV, I swapped them front to rear. Reset AFV to 100, and will try and get out in the next couple of days to see what happens. Will report back ..... | ||
| Akbuell |
Ran some errands in town, then out to the 4-lane. 30ish miles out, 30ish miles back. The 'heavy' or 'soft' throttle was diminished, as was the vibration. Calling this a success. The AFV did return to 95 though. | ||
| Two_seasons |
Check all sensor related connectors, including the ECM, for corrosion. "Exercise" them, that is, several cycles of connected/not connected, to clean the pins and sockets. Don't forget the fuse box and grounds. | ||
| Two_seasons |
Something else I just thought of. Roll your throttle full travel several times, quickly, with the engine off. This will clean the slider in your TPS of carbon deposits and flat spots (the tps is a carbon slug/slider setup). | ||
| Natexlh1000 |
Perhaps in your location, 95 is the correct number? What is the elevation? | ||
| Akbuell |
Two-thanks for the info; have done those things recently, just not this week. I think Nate has the answer. As I mentioned, swapping the injectors seemed to minimize the running issues- the throttle is not as soft, and the vibration is down. At an altitude of 2k ft, the ECU might want to be at 95 instead of 100. If it were at 102, or 97, after running, O.K. Something in the 85-90 area, or 120+ however ....... |
