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Location:
Perth, WA
Registered:
May 2005
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 1JZGTE Misfire - Cruise Control ?
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Mon, 16 May 2005 00:44
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Im still experiencing this terrible misfire when cruising in the mornings at around 110. 
Today I tried to narrow it down a bit and it only seemed to do it when cruising at/above 3600rpm - 108km/hr and above.
Could this be related to the cruise control system at all - as I think the max cruise control limit is 108km ???
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1JZGTE Misfire - Cruise Control ?
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Mon, 16 May 2005 00:47
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so it's only at 108+km/hr AND 3600+rpm? if you put it in 5th and cruise below 3600rpm, does it still do it?
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Location:
Perth, WA
Registered:
May 2005
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Re: 1JZGTE Misfire - Cruise Control ?
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Mon, 16 May 2005 01:47
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It appears to only happen when at or above 107-108km/hr which is 3600rpm in my car (Ford Auto Transmission).
If I cruise at 3500rpm it's fine.
So far it has only happened in the mornings too.
I can accelerate beyond that point though and it goes alright.
Load, acceleration all seem to be fine - seems to happen when cruising.
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Location:
Perth
Registered:
July 2003
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Re: 1JZGTE Misfire - Cruise Control ?
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Mon, 16 May 2005 13:19
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Ash - the wife's V6 auto commodore does exactly this as well (misses under light load only at a certain speed). It had me baffled for a long time - until I checked the plug leads and found two of them out of spec. The strange thing is it didn't do it under any other conditions.
I know you don't actually have any plug leads, but I'd be having a really close look at:
- the coilpack primary plugs (the retaining clips always break & the plug can work loose)
- the coilpacks themselves - look for evidence of arcing or tracking on the underside of them
- the plugs. Check the gap and check there is infinite resistance between the centre electrode & body (I had a few platinum ones that started to break down in this way).
- the conection between the coilpack & plug. From memory there is a small springy thing that sits between the coilpack & plug.
Regards
Peter
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1JZGTE Misfire - Cruise Control ?
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Mon, 16 May 2005 13:33
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plug gap can be a big one - 0.8mm - I've had this problem before (it was noticable at light throttle, but my car doesn't spend much time there)
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Location:
Canberra
Registered:
May 2002
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Re: 1JZGTE Misfire - Cruise Control ?
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Tue, 17 May 2005 06:44
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Just something else that may cause the prob, check you vacuum line to the cruise control cannister.
cheers Chuck.
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