Engine Problems - Will not Rev past 3000rpm
Thread Starter
Junior Member
Squid
Joined: Jun 2011
Posts: 2
Engine Problems - Will not Rev past 3000rpm
hey guys,
I was riding when I suddenly lost engine power and couldnt get it to rev past 3000rpm. However, the engine starts and idles fine and sounds good at idle. I recently put in APE CCTs so i took the bike apart to see if the timing chain skipped or if it was loose but the timing was still correct and chain tension was fine. I then thought it might be a bad TPS sensor but from what little I've been able to find the bike should still be able to ride with a bad TPS, just a little sluggish. I checked the connector going to the tps and get 5v through the multimeter but had had difficulty getting it to read an ohm reading. Is the TPS sensor the issue? I dont want to throw a $100 sensor at it if its not the problem.
-thanks
I was riding when I suddenly lost engine power and couldnt get it to rev past 3000rpm. However, the engine starts and idles fine and sounds good at idle. I recently put in APE CCTs so i took the bike apart to see if the timing chain skipped or if it was loose but the timing was still correct and chain tension was fine. I then thought it might be a bad TPS sensor but from what little I've been able to find the bike should still be able to ride with a bad TPS, just a little sluggish. I checked the connector going to the tps and get 5v through the multimeter but had had difficulty getting it to read an ohm reading. Is the TPS sensor the issue? I dont want to throw a $100 sensor at it if its not the problem.
-thanks
Senior Member
MotoGP
Joined: Jul 2010
Posts: 3,871
From: Phoenix, AZ
Yeah, that sensor is very low on the list of things it would be. Vacuum lock possibly. Has the bike been sitting or in the rain or did you fill it really full recently? This would cause a vacuum in the tank and not allow enough fuel to reach the carbs. Quick check for this is to try running it with the gas cap open.
Maybe one of your coils isn't working properly or connected fully.
Maybe one of your coils isn't working properly or connected fully.
jet wrench
Back Marker
Joined: Jun 2007
Posts: 175
From: cowtown, CA
Absolutely, I fought a problem like this for quite some time, and after much wasted time and money... It was a weak coil... consistent but WEAK. The color of the spark is what finally tipped me off and it was subtle, but occasionally yellow instead of blue all the time...
Coil,Coil,Coil!
Coil,Coil,Coil!
the boss
SuperBike
SuperBike
Joined: Mar 2010
Posts: 1,182
From: largo,fl
I have been having odd problems with bike,my ideas lead me to this,I have new ones coming thank god.
Only other thing it could be for me is valve adjustments or bad/dirty valves.but this is just my issue.
I would really check those coils too.
Only other thing it could be for me is valve adjustments or bad/dirty valves.but this is just my issue.
I would really check those coils too.
Slacker
Superstock
Superstock
Joined: Jun 2005
Posts: 489
From: San Antonio, TX
Forget about the TPS for now. You could unplug it and the engine will still run quite well.
I would suspect a problem with the carb slides not opening, such as a torn slide diaphragm.
I would suspect a problem with the carb slides not opening, such as a torn slide diaphragm.
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faz
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Aug 10, 2004 10:42 PM
