Hi everyone, just replaced sons 1997 1.0 micra vibe with 2000 1.3 micra inspiration. On the drive home (70 miles) everything was OK apart from air con not working. Put some red X in tank and poured some down throttle body to give injectors a clean but now it seams to be idling way to fast, 1200rpm, could this be down to the red X? I think the throttle body is OK, plenty of power, smooth no staling, old micra had to have new throttle body so I know what that felt like. I have turned idle speed down all the way and its now at about 650rpm but when I turn the steering now I dont hear the pressure switch kicking in to raise the revs? Could the fast idle switch be at fault? is there a way to test it?
Fast idle
- Thread starter Madrat
- Start date
frank
Club Member
the idle control valve is on the front then, controlled by the ecu
the idle adjust screw is just an adjustable air leak, so you adjust that in order for the i/c/v to operate from fully closed to fully open
the waxstat is at the back of the t/b, and this holds the throttle slightly open when the coolant is cold
the idle adjust screw is just an adjustable air leak, so you adjust that in order for the i/c/v to operate from fully closed to fully open
the waxstat is at the back of the t/b, and this holds the throttle slightly open when the coolant is cold
pollyp
Club Member
if ur TB is a preface waxstat operated version then this guide may help
https://www.micra.org.uk/threads/pollymobiles-rebuild.35251/page-19#post-446256
https://www.micra.org.uk/threads/pollymobiles-rebuild.35251/page-19#post-446256
OP
OP
OK might be sorted, topped up with petrol to dilute red X in the tank and gave TB a good dose of carb cleaner, idle is back to normal and power steering switch is also kicking in. I'm going to get emissions checked are I think fuel consumption is a bit high, but as this is a new car that could be anything. Can I assume that if emissions are OK and the fact that there is no stalling, jumping, erratic idle and it has power through the rev range etc that the TB is fine?
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