So iv got a 2000 cbr600F4 it's lost spark but my question is when I test two different coils they both give off 11.58 volts is this correct or is my ECU buggered
So why do you think the ECU is "buggered" and not the battery? In my garage, when I get a reading of 12v or less, the battery is toast. But that's here. Not sure what that means where you are.
A new battery should be reading over 13v. A battery is dead at 12v. Did you charge this new battery or just stick it in and start riding or trying to ride? Every new battery needs to be brought up to full charge before using it. Sometimes retailers do that but not always. So what's the history of this new battery. And by the way, a new battery can be bad right from the get go. Won't take a charge.It has a Brand new battery
Connecting a small motorcycle battery to a running car will kill it, and fast, from too much charge current. NEVER use a running car or truck to power a motorcycle battery! You may already need a new battery.
- The battery is like less than month old it was dead when I got back from Xmas so I just hooked it up to a running car, then I did the tests on coils with ignition on (ready to start). The bike was running mint just didn't start one morning now has no spark, bit stuck on it tbh, iv also recently relocated my ECU to under my air filter witch may of cooked it
I tested the two wires on the coil it has stick coils btw the battery shouldn't matter iv had it on car a many many times an never hurt it an it's not a cheapy either it's the biggest bike one you can buyConnecting a small motorcycle battery to a running car will kill it, and fast, from too much charge current. NEVER use a running car or truck to power a motorcycle battery! You may already need a new battery.
Just how and at what terminals are you testing the coils? A coil's (+) low tension terminal is connected to the battery on one side, through the ignition switch, and the other low tension terminal to the ECU (or points) that briefly switches that one to ground. When that switch is turned off, a spark is generated. For most coils, the high tension terminal (the one that goes to the spark plug) may read close to battery Voltage when not making a spark, because it is connected to the (+) terminal internally; however, there is a lot of fine wire between that terminal and the (+) terminal, so the meter itself may lower that Voltage, due to the resistance of that wire and the amount of current the meter uses to take the measurement. For this reason, measuring the Voltage at the high tension terminal is not very useful, as it may, or may not, vary between coils, except it shows it is, in fact, connected; there is also the possibility of a spark, which could damage the meter.
I use a mates battery that starts his bike an still no sparkWintrSol is giving good advice but what we are both concerned with is whether you have a good battery anymore. You state you are getting less than 12v and a good battery should be no less than 12.5v. Connecting to a car battery is okay as long as you don't start the car and it isn't clear if the car has been running at any time or not as that can and will fry a battery. Everything else you've stated is irrelevant unless you start with a battery of at least 12.5v. WintrSol is much better at this so I advise you to read his posts again but start with a good battery at full charge or at least 12.5 since full charge is more like 13.5 and it isn't clear you have the means to do that if you are using a car battery in conjunction with the motorcycle battery. In fact you may have cooked the ECU doing so. Some how we all need to get on the same page if that makes sense.
Well if there are no issues with the battery or the bike, and your friends bike runs, you should be out riding by now. Obviously something is amiss. Your job is to adequately search and find.The bikes been wet before an I just let everything dry out an it went fine so thats not the issue