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when mine left me stranded i used some info in the manual combined with old school knowledge to just narrow it down to the coil. testing the new ones is a pita, so i just replaced it and havent had any problems with the bike since.
Thanks for your help and information. Really appreciate it. With it I was able to check the coil...which turned out to be OK. I narrowed it down to a bad CKP sensor. Back on the road.
Jackie
Really appreciate all the help and information. I bought a new CKP sensor and that was the issue. Would not have identified it without your help.
Many thanks.
Sammy
I think that once you crank the motor, the pump doesn't run all the time. Only as long as the ECM detects crank rotation then stops the pump a few seconds after the crank sensor is no longer sensed.
All FI run the fuel pump when running to maintain a constant fuel pressure. It needs the 60 or so at idle since the mixture is trimmed so lean and of course WOT.
In the first generation FI, on a Harley,it had a return line. Now the pressure relief in tank maintains it.
Interestingly, some makers use two relay system and no timer. The timer ones really is mainly a system check since it only takes a brief second to build pressure. It takes that long cranking for CKP to check and turn on coil and of course fuel pump.
Toyota uses two relays. One is on in the actual cranking. Not just key on. As soon a motor starts and you turn start to on on the key, then ECM of course is getting CKP readings and other relay circuit is grounded.
Last edited by Jackie Paper; Nov 24, 2023 at 05:07 PM.
Jackie
Really appreciate all the help and information. I bought a new CKP sensor and that was the issue. Would not have identified it without your help.
Many thanks.
Sammy
Too cool. And thanks for sticking with it and coming back.
Just out of curiosity did you ohm new one? There is no call out since book implies checking it with voltage but surely it has some resistances. Or maybe not. ECM passes a volt or so thru it to make it a electric magnet. The metal keys on the crank spinning by is then read by the change feed back.
Last edited by Jackie Paper; Nov 24, 2023 at 04:44 PM.
All FI run the fuel pump when running to maintain a constant fuel pressure. It needs the 60 or so at idle since the mixture is trimmed so lean and of course WOT.
In the first generation FI, on a Harley,it had a return line. Now the pressure relief in tank maintains it.
I think that once you crank the motor, the pump doesn't run all the time. Only as long as the ECM detects crank rotation then stops the pump a few seconds after the crank sensor is no longer sensed.
Originally Posted by Max Headflow
That's what I wrote..
Sorry. Didn't quite get that from your post. But yes true . Normally would be key off or bank angle sensor activated to get that.
Sorry. Didn't quite get that from your post. But yes true . Normally would be key off or bank angle sensor activated to get that.
So hence by wordy explanation.
I would think that key off, BAS or even run/stop switch switched off, would cut the pump immediately.. If the bike don't start or the motor is stalled, the pump will run 2 seconds then shut off as stated in the manual.
Too cool. And thanks for sticking with it and coming back.
Just out of curiosity did you ohm new one? There is no call out since book implies checking it with voltage but surely it has some resistances. Or maybe not. ECM passes a volt or so thru it to make it a electric magnet. The metal keys on the crank spinning by is then read by the change feed back.
Like to update this thread that downtown got back to me that the new CKP sensor did have some resistance.
Last edited by Jackie Paper; Nov 29, 2023 at 07:10 PM.
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