Dave84 Posted August 29 Posted August 29 Hi Iv just picked up a 2017 micra with the 0.9ltr engine in from Copart. It’s got a slightly rough idle, Iv just replaced the plugs and oil and filters on the car as I don’t know the history. It’s done 54k miles the evap system seem to be working ok. I don’t have a vacume pump to check properly but it’s not getting blow by out the dipstick or the filler cap. im a bit to remove the throttle body and clean it but after this I’m kinda stumped. Unfortunately my code reader is showing nothing on the system and there is no lights on the dash. Short of replacing all the coil packs I’m stuck. Any ideas?? on start up it also has a high idle as well seems to sit around 1500 and then drops off to around 800. I’d expect this on a cold morning for the cold start but it’s not been cold.
Dave84 Posted 3 hours ago Author Posted 3 hours ago Kind of resolved this now a bit. It still has a slightly rough idle in my opinion but it is a 3 cylinder so could just be the nature of the car?? any way I metered out the coil packs all seem to be the same and as I don’t know what they are supposed to be I’m going with they are ok? I also unplugged them one by one and the engine started to misfire as expected. I removed the throttle Body and gave it a good clean. It wasn’t too bad but there was a little bit of oil in there. I also unplugged the fuel solenoid purge valve and let it run for a second or so and plugged it back in. I also found that both battery terminals were very loose! So they got tightened up as well. Since doing this it seems to idle better. The only time the revs seem to hunt is when the ac is on now and the highest it goes is up to about a 1000 when the clutch kicks in which I’d kind of expect as there is extra load on the engine.
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