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Location:
Melbourne - NthSubs
Registered:
January 2004
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4age idle problems
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Fri, 18 November 2005 02:09
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my 4age revs from 1100 > 1500 > 1100 > 1500 > 1100 and so on
not sure wats wrong with it, i checked all the vac lines and other things, also tested the tps, turned the idle screw to the lowest point...
the car drives fine beside the random up and down idle
i did a search a found nothing similar? also check the 4age trouble shooting manual and still can't findanything???
video will be up soon 
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I supported Toymods
Location:
sydney.au
Registered:
August 2002
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Re: 4age idle problems
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Fri, 18 November 2005 02:19
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like a constant up and down?
vvvvvvrrrrRRRRRRRRrrrrrvvvvvvvvvvvrrrrrRRRRRRRRRRr rrrrvvvvvvv
if ya get me.. lol
mine does this sometimes. no real pattern to it either. and ive also checked vacumn tps and idle valve.
weird.
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: 4age idle problems
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Fri, 18 November 2005 02:38
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yea, it happens all the time... pull up to a set of lights then the dood next to me starts revving his engine  needless to say wat happens next
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 4age idle problems
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Fri, 18 November 2005 03:21
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vacuum leak?
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: 4age idle problems
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Fri, 18 November 2005 05:18
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i took off the map sensor and it idle at 800rpm... but was crap im pretty sure there are no leaks or anything... but i oil temp dont work?
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Location:
Sydney
Registered:
July 2003
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Re: 4age idle problems
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Fri, 18 November 2005 12:21
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mine has just recently begun doing the same however it was after flushing the coolant...
i think i read some post on here that if there is an air pocket on the back of the head somewhere near the temp sensor it will do this...
i have however made sure the system is free of air but still remains the same  so it beats me...
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Location:
Perth
Registered:
October 2005
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Re: 4age idle problems
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Fri, 18 November 2005 13:03
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Sounds like a TPS, vac leak, idle adjust screw?? prob. The ECU thinks the engine is at idle but toooo much air is getting in so the engine revves to the idle fuel cut point 1500rpm, and cuts back in at correct idle. Check harder for air leaks, haha definatly sounds like a hose has come off or cracked. good luck.
Chris.
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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: 4age idle problems
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Fri, 18 November 2005 21:16
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Leo,
Try taking off the ISCV thing off, clean it out using some throttle body cleaner, and wacking it back on. Solved my occasional hunting.
Yian
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Location:
Sydney
Registered:
October 2002
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Re: 4age idle problems
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Sat, 19 November 2005 02:04
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The airlock in the cooling system like Noodlebut said is usually the cause but i've also seen an incorrect inlet manifold gasket do this. Is it also running quite rich?
~Josh
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: 4age idle problems
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Sat, 19 November 2005 04:38
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iv check to c if there are cracks or vac leaks but cant find any? might have to rip the engine out again to take a look
thanks guys
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Location:
Sydney
Registered:
January 2003
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Re: 4age idle problems
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Sat, 19 November 2005 05:32
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My 4AGE had quite an erratic idle too, but found out the head gasket was wayy gone 
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