#137902, "buzzing noise from ecu" May-13-13 08:32 AM by Narrece2000
I'm new to this but i have a 95 eclipse rs 420a and i have been hearing a noise coming from the ecu after i have been driving it for a while. When i got out to check it i heard a click which sounded like it came from the MPI or ASD then the noise from the ECU stopped. Could these relay be going bad? It also idles around 700 to 800 rpms sounds like its missing. The check engine light is not on and no codes come up when i had it tested.
#137903, "RE: buzzing noise from ecu" In response to Reply # 0
They all have a buzz or high pitched whine to them, and they stay powered on for some time after the car is turned off to run O2 sensor heater tests.
As far as the idle quality, there's several things that could cause that. If it's not generating a misfire code or a target idle not reached or similar, don't worry too much about it.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#137904, "RE: buzzing noise from ecu" In response to Reply # 1
When you first start it up the idle is fine but once it warms up The idle bounces between 700 to 800 rpm. Sometimes it will just shut off when you push the clutch and the car slows down. It starts back up but you have to keep pushing the gas. After you get going for a while it stays running but still bounces in between 700 to 800 rpms. Could the IAC be going out?
#137905, "RE: buzzing noise from ecu" In response to Reply # 2
That could be the IAC. There should be a cleaning procedure documented either in the wiki or on the forums if you search, which may help the issue.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
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