EFI surging

rd1959 · 04-05-2020, 07:45 PM

My rx3 has an annoying habit of what feels like the EFI surging between 4000-5000 rpms. It seems worse when the engine hasn't warmed up completely. Does this happen to anyone else's bike? Is there a fix for it?

NzBrakelathes · 04-05-2020, 08:20 PM

Sounds like MAP sensor faulty - I have had a couple bikes do this.

Jay In Milpitas · 04-17-2020, 06:12 PM

Quote:

Originally Posted by NzBrakelathes

Sounds like MAP sensor faulty - I have had a couple bikes do this.

Nice work. How did you identify the fault? What specs should a good or bad sensor read?

NzBrakelathes · 04-20-2020, 08:25 PM

It was surging.......
1 bike had a minus 5 degrees C exhaust temp...
1 bike I couldn't see any fault in live data but experience told me its a likely cause...

rd1959 · 04-20-2020, 09:25 PM

According to CSC it's probably normal because the problem goes away when the engine is at full operating temp (and after it's been ridden for a 2 or 3 miles). Also, if the temperature is above 65 it won't act up.
CSC also stated that if the MAP sensor was faulty it would show an engine code. Mine doesn't show a code.

NzBrakelathes · 04-23-2020, 07:49 PM

Quote:

Originally Posted by rd1959

According to CSC it's probably normal because the problem goes away when the engine is at full operating temp (and after it's been ridden for a 2 or 3 miles). Also, if the temperature is above 65 it won't act up.
CSC also stated that if the MAP sensor was faulty it would show an engine code. Mine doesn't show a code.

My experiance with surge and faulty MAP sensor - no fault code due to it functioning just not dead but incorrectly and no fault code

04-05-2020, 07:45 PM	#1
rd1959 Join Date: Jul 2017 Location: Monroe,NC Posts: 131	EFI surging My rx3 has an annoying habit of what feels like the EFI surging between 4000-5000 rpms. It seems worse when the engine hasn't warmed up completely. Does this happen to anyone else's bike? Is there a fix for it?
	0

04-05-2020, 08:20 PM	#2
NzBrakelathes Join Date: Jun 2016 Location: Hell Posts: 2,408	Sounds like MAP sensor faulty - I have had a couple bikes do this.
	1

04-20-2020, 08:25 PM	#4
NzBrakelathes Join Date: Jun 2016 Location: Hell Posts: 2,408	It was surging....... 1 bike had a minus 5 degrees C exhaust temp... 1 bike I couldn't see any fault in live data but experience told me its a likely cause...
	0

04-20-2020, 09:25 PM	#5
rd1959 Join Date: Jul 2017 Location: Monroe,NC Posts: 131	According to CSC it's probably normal because the problem goes away when the engine is at full operating temp (and after it's been ridden for a 2 or 3 miles). Also, if the temperature is above 65 it won't act up. CSC also stated that if the MAP sensor was faulty it would show an engine code. Mine doesn't show a code.
	0