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29-06-2016, 05:04 PM | #1 |
Junior Member
Join Date: Jun 2016
Location: Auckland
Car: Ford Laser GLXi 2002
Posts: 1
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Ford Laser GLXi 2002 [NZ new]
Just wondering if anyone on this forum can suggest what is the cause of intermittent rough idle with this vehicle [idle speed drops from 750 rpm to 650/600 rpm] and appears on the verge of stalling - has just been serviced and has new plugs fitted.
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30-06-2016, 08:48 AM | #2 |
Junior Member
Join Date: Mar 2016
Location: brisbane
Car: 2003 sp-20 (safety vest yellow)
Posts: 23
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Common problem with many causes
1. plugs and leads.Sounds like you have checked that! 2. Air intake pipe . Check for cracks and splits minor splits will cause rough idle ,major one and the car will miss or not run. 3. Vacuum leak in the pipes or throttle body. If you idle the car and hit the brakes hard ,and it almost stalls, this is the most likely cause. 4. Dirty or faulty MAF sensor (should be cleaned at service)If you clean it .Dont touch the wire sensor it's very fragile. buy the spray can cleaner from auto store. (I use a spray bottle with metho myself) 5. Idle needs resetting If you are very lucky!. You have to bridge a couple of pins in the diagnostic port first then set the manual screw on the throttle body LINK http://www.club323f.com/forum/viewtopic.php?t=38000 6. stuck IAC valve clean or replace. still looking for the link. 7. almost forgot the idle compensate for the aircon .Does it do it with or without the aircon on? or both.? if its only with aircon on that will be the problem if problem not as bad with the aircon on then its fine. spray bottle with water is real handy for finding vacuum leaks spray the area and listen for idle changes. Last edited by vkrules; 30-06-2016 at 08:57 AM. |
30-06-2016, 09:15 AM | #3 |
AstinaGT Regular
Join Date: May 2016
Location: Brisbane
Car: '96 Astina, '90 BG, '91BG, 92 SP BG & a partridge in a pear tree..
Posts: 296
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2 basic things to check :
Spark plug gap (don't laugh) Too many "A" grade mechanics just wack em in outa the box And that the leads are actually "clipped" pushed on !!
__________________
Speed is subjective to only how far you keep your right foot down.. |
01-07-2016, 06:59 AM | #4 |
Senior Member
Join Date: Sep 2004
Location: n/a
Car: n/a
Posts: 10,929
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does it do in on and off at idle?
does it do it when slow down at a set of traffic lights? |
01-07-2016, 09:49 AM | #5 | |
AstinaGT Regular
Join Date: May 2016
Location: Brisbane
Car: '96 Astina, '90 BG, '91BG, 92 SP BG & a partridge in a pear tree..
Posts: 296
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Quote:
__________________
Speed is subjective to only how far you keep your right foot down.. |
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