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Location:
Perth
Registered:
October 2003
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1JZ & Haltech Stalling when cold
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Tue, 24 August 2004 10:25
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Guys,
Im running an E6X with the OEM idle control motor. When the engine is cold, it often stalls when im braking and downchanging, not cool when the pedal suddnley feels like a rock with a car in front. Any ideas what to alter in the haltech setup to stop this, is it an idle motor control problem?
Cheers
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Location:
Canberra
Registered:
May 2002
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Re: 1JZ & Haltech Stalling when cold
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Tue, 24 August 2004 11:31
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Try the output options page (CTRL-O) & adjust the "cold opening" parameter for the idle stepper control. Go up in increments of 5, and check each time after giving the motor a small rev in neutral. It should come back to about 100-200rpm above idle speed for a moment, then drop to idle.
If this doesn't fix it, then you probably need to work on your fuel & ignition figures at 500 & 1000rpm.
Good luck, let us know how you go.
Cheers
Phil
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Location:
Perth
Registered:
July 2003
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Re: 1JZ & Haltech Stalling when cold
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Tue, 24 August 2004 12:53
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Skip - Justin is having the same issues and has been given a few parameters to try.
Maybe you guys can swap notes at the Oldskool cruise on Sunday.
Justin - where are you?
Peter
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Location:
Perth
Registered:
October 2003
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Re: 1JZ & Haltech Stalling when cold
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Wed, 25 August 2004 00:15
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TE72_Turbo: Thanks for the info, ill give it a try.
Pete: If Justin doesnt reply here soon ill PM him.
Yeah hopefully I can make it to the cruise, my clutch is giving me the craps still but, it's not fully disengaging enough since i upgraded the pressure plate. Alot of gear grinding is going on now 
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Location:
Perth
Registered:
October 2002
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Re: 1JZ & Haltech Stalling when cold
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Wed, 25 August 2004 03:19
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Hi Skip,
I had the EXACT same problem - which I've not got pretty much under control. As TE72 says above, start with the cold opening percentage - though I found that to ptoperly test it I had to go round the block rather than just add a few revs. If you add too much, the engine will hunt at iddle and sound like a bent orchestra. I gave it an extra 5 (taking it to 35 from memory) and may give it another 5 on the weekend - still getting a bit close to stall. I think that will solve you're problems. But, if not, you might have a look at your Cold Min Position figure on the same window and/or adding a few percentages to the low temp bars in the Fuel-Coolant Correction map.
HTH,
Justin
PS Are you using fuel cut on deceleration? I'm about ready to turn mine on.
PPS What is your base idle set to? Haltech factory base-map was 816rpm, which is what I'm currently on - though I read in other post that 700rpm is factory. Just out of curiousity - idle sounds good.
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Location:
Perth
Registered:
October 2003
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Re: 1JZ & Haltech Stalling when cold
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Wed, 25 August 2004 05:13
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Cheers mate ill give it a go. No fuel cut ATM, my base idle is 800 rpm, it tends to hunt up and down a bit to 900 rpm though. 700 rpm sounds too low to me.
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