| Author | Message | ||
     Baybueller |
08 Uly does not run cleanly in midrange. WOT yields a condition best described as lean fueling or incorrect timing. if the throttle is backed off the engine will "catch up:. Replaced and relocated EBR ECM, replaced o2 and temp sensors and intake seals. I have run injector cleaner through in the past. I was looking at ecmspy but with my lack of computer skills it may just cause more frustration. Above 5K rpm it runs well but I spend little time there. Any thoughts or suggestions would be appreciated. | ||
| Etennuly |
How many miles? Any codes? Did you go in and change anything with ecmspy? Injector cleaners are usually worthless, Sea Foam has proven to be effective for many of us. Could be as simple as a bad ground, loose battery cables, loose ECM plug, cracked ECM, bad plug wire, or plug, bad coil, or ignition wires not pushed on all of the way. TPS reset done incorrectly. It must be done with the engine hot and it is best to clean the throttle plate for carbon build up before tuning. There are more things after these things are confirmed good and correct. | ||
| Baybueller |
22k miles, no CEL, new EBR ECM for Drummer to replace same. Ignition coil was not tested as that info is not in the shop manual and usually a faulty coil will not work well at high RPM. TPS done per EBR. I suspected a faulty TPS earlier but Al from American Sport Bike did not believe that to be the case. I put seafoam in today and will put more miles on tomorrow. the real oddity is it runs well over 5k rpm. | ||
| Griffmeister |
Many people rave about Seafoam but they also say to have a new set of plugs ready to go in after wards. Also, did the symptoms come on suddenly, slowly over some time, or right after some work was done? As Et says, check the simple things. | ||
| Etennuly |
I had a buddy come by one time to set his TPS, the bike was running OK but not great. All we did was reset the TPS and it began to run like you have described yours doing. He had a difficult time getting it to make it a mile back to my shop. Upon a closer look we found the edge of the throttle plate felt rough. So we cleaned it with some carb cleaner and got a good closed snap, and smooth feel of the off the bottom actuation. Reset the TPS again and it ran better than it ever had. These engines run lean and hot, that makes for burned carbon build up with the fuels we run these days. My '06 had a massive amount of carbon in the intake at about 35,000 miles when I opened it up to install new intake seals. I clean my throttle plate with just a little shot of carb cleaner, when ever I have the air box cover off. If the edge of the throttle plate feels like the teeth of a large mouth bass, it needs cleaned up to close properly for the "0" position required at the TPS setting. Once it has been set, the idle speed setting holds the plate open a little allowing the build up to happen. | ||
| Baybueller |
Looks like I've been barking up the wrong tree. Took the bike to the HD shop and the rear cylinder flunked the leakdown test. Did not consider rings/valves because of miles and good maintenance. guess its time to get familiar with the motor. Thanks for the input. | ||
| Etennuly |
That would be a rare problem!  | ||
| Tootal |
I hate to hear that but if you pull the cylinders yourself and take them to a good machine shop that does Harley cylinders and have them honed .005"-.010" over using torque plates. Get some oversize pistons and have a machine that's better than factory. | ||
| Baybueller |
I asked the dealer about trade in with the problem and 1k made me laugh. Getting a dyna to fill in while I overhaul the bike. I work on machinery all day and get a little burned out on home projects but I cant sell in good conscience so its up on the rack. | ||
| Sagehawk |
How bad did you fail the leakdown test? True, these are a whole lot more sensitive than old pans n shovels, but still, they should run quite a while even if not 100 %. not all will share my views and thats ok. was a compression test done as well? Perhaps carboned up a lot? I understand the part about working on machinery and tired of doing work at home. still got a bathroom with nothing but studs in wall. hearing bout that too. oh well, I feel the pain. Let us know with pix during upper end work if you can so we can keep up with you. I got a 96 flhr that has a timing chest full of metal that I will probably pull apart soon. lifters i guess. I'm interested to know what buells use for deck height, head gasket thickness, base gasket thickness, barrel length,and anything else you can measure. I know, I am a needy bastige. Inquiring minds wish to know. good luck! | ||
| Baybueller |
Dealer said 180/180 on compression and 5/80 on leak down. Low confidence in them but it makes sense as to the problem. New lowrider today, has dual disk so at least I can approach the corners hot before enjoying the 30 degree lean angle. Not happy with the Moco but the product is stupid easy to maintain. | ||
| Sagehawk |
Hard to believe a180# cranking pressure with an 80% leakdown rate at ?22000 miles. Did dealer do this cold or hot? | ||
| Tootal |
I got a 96 flhr that has a timing chest full of metal that I will probably pull apart soon. lifters i guess. Something like this?  | ||
| Sagehawk |
More than likely Tootal. Havent gotten into it yet. What is it with 25,000 mile lifters on evo's anyway? Have any buells had this type issue with lifters? Sorry , a bit off subject but necessary. Happy mothers day tootal! | ||
| Baybueller |
Sage, I have no trust in Harley so I will do my own check. With that leak down rate it would be hard to pump 180. One the other hand my new dyna seems pretty good so far, 100 lbs torque off idle and handles as well as a harley can. | ||
| Baybueller |
Tootal, did that sit for a long time? Pattern says yes. | ||
| Sagehawk |
Do you have a leak down tester? Father in law had broken ceramic off a spark plug. Brazed a schraeder valve in. Way to pressure up a cylinder. Set cylinder chosen to tdc, lock crank down either rear wheel in gear or primary. Pressure up and listen with stethoscope at intake, exhaust or oil tank. Should hear leak if that bad. Old school but still effective. | ||
| Baybueller |
a buddy has a leak down kit. I will check in when the motor comes apart. | ||
| Tootal |
Those were out of my friends 97 evo. I took it for a ride because he had shoulder surgery and couldn't ride. He asked me to "stir the oil up" for him. About ten minutes later it was making really bad noises!! I was just putting through a neighborhood at 35 mph! I ended up rebuilding it for him and he put another 70,000 miles on it. Not bad for an 80 year old man!! | ||
| Baybueller |
Still processing information. On return from the dealer I did a hot oil level check, the oil just about came out the top with the dipstick removed. Seems our intrepid "Buell expert" did a cold check and figured it needed oil. The shop manual says 120 or better compression is good and with either ring or valve problems it will not attain that. I was told the compression was 180 with an 80% leakdown. I will quit bitching now and post if/when I ever sort this out. | ||
| Tootal |
Something is not right. I'd try a hot compression test and then add a shot of oil in the cylinders and test again. If compression rises it's your rings, if not then it's the heads. I'm in agreement that it sounds like some carbon on the valve seat. Maybe run some sea foam through it and run the snot out of it and test again. | ||
| Baybueller |
I have run sea foam thru the tank but not pulled with vacuum. I'll run another batch in the tank, can't hurt at this point. |
