405 Mi16 inconsistent idle

A

Angus

Member
Fellow Frogger
Joined
Jul 12, 2002
Messages
46
Location
Melbourne, Australia
Hi,
I have seen posts like this before but didn't have the time to dig them up from the depths of the forum!! Anyways I have a feeling what I am about to describe is a common problem.
Last night when driving home i got stuck in traffic and as per usual the temp gauge went up to say the 90 mark. (this happens whenever I am not moving for say 5 minutes or so) anyways I started to notice that the car was idleing poorly, it had like a throb to it, dropping down to about 600-700 mark and going up to about 1400-1500 mark. It was weird, it wasn't like the car was rough it was more like i was gently touching the accelerator and releasing...
anyway after it did it for a while, i pulled over and switched it off. couple of minutes later, started her up again and everything was fine, normal idle no throbbing. Then today, normal idle. So I am just wondering what may have caused the problem last night, whether its serious and whether it will come back?!

Cheers
 
I've had a similar occurrence with my pug... turned out to be a broken thermostat. I'm not the most mechanically minded person so I can't say if it's the same case, but hope that helps. Anyone else got thoughts?

Rich
 
Hi,

I know the series 2's are diff to my series 1 but I have had a very very simular fault.

I seems that the idle stepper control looses the plot, maybe a drop in current or something I dont know, but stopping the car and starting it resets the ECU and Idle control and the problem goes away!

I've had mine do it once or twice now...just doing *for want of a better term* a cold re-boot fixes it!

Cheers

Ben
 
My S16 does something similar sometimes, spesh if the air is very cold outside.
But only drops slightly like as if it has a lumpy cam or something. i just have to give it a little rev to say about 1100rpm, and alls good. - chris
 
Likewise Chris, mine is usually quite lumpy when the car is started when warm, but left for a little while, say 30 mins. Otherwise it's sweet.
 
yeah Brad. lol.. i BS to mates that ive had more internals work done. I tell em absolute crap like i had JUN cams with Ken-Works lifters and valves.... they don;t knwo the diff but soon realise its crap when the car returns back to normal.lol. - chris
 
Yeah, my common response it that it's my "lumpym V8 derived cams" LOL. Sif.
 
By the way...WTF did you overtake me in posts???? Just as well you can't do it in real life roll_lau moon roll_lau
 
I'd better add a few more comments to catch up.....dum-de-dar.....dum-de-dar.
 
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