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I supported Toymods
Location:
Australia
Registered:
November 2003
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Location:
opening a can of whoop ass
Registered:
June 2004
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Re: 1uz on microtech miss
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Thu, 06 January 2005 05:08
 
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are you sure when you played with the idle timing and fuel you have pulled the equilent out of the rest of the tune? seems funny how its happening now.
on the other hand i think its rude for the tuner to say cant help for two weeks, have you suggested maybe taking him for a road tune for 5 mins?
good luck with it.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Thu, 06 January 2005 05:13
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I'm pretty sure it hasn't touched the rest of the tune, but I will put it back to about where it was, see if it makes a difference.
I doubt it will though.
Tuner hasn't told me he can't help, I just can't book the car in for 2 weeks.
I might just 'drop in' tomoz and see if he can look at it like you suggested.
Its hard for me to get him the car during the week, and like most places, he's booked solid on saturdays.
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Location:
Perth
Registered:
October 2003
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Re: 1uz on microtech miss
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Thu, 06 January 2005 08:26
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Can you data log with that thing?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Thu, 06 January 2005 08:28
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| Skip wrote on Thu, 06 January 2005 16:26 |
Can you data log with that thing?
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Ummm, to an extent I think I can.
Never used it tho.
You suggesting I see what the injector pulses, timing and the like does around the miss?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Thu, 06 January 2005 08:32
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Data Logging
Onboard "ECU-log" holds 5mins of memory.
User definately switching on and off point.
Data Log to memory (laptop) 100 samples per seconds
Viewed data log displays average readings 10 times per second
Data log viewable in text or graph
Playback data log
Print data log
Save data log to disc
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Sounds like I can, now I just gotta find out how to use it.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Fri, 07 January 2005 00:32
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Driving around the car last night and it feels like the timing retards around 5-10 degrees @ 3500rpm.
Haven't had the laptop out yet to see what is happening, but you can feel a loss of power at those revs.
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Location:
Perth
Registered:
October 2003
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Re: 1uz on microtech miss
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Fri, 07 January 2005 01:37
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Datalog the biatch!
Im positive you will find the problem in that area, check for rapid RPM fluctuations etc.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Fri, 07 January 2005 11:03
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Well, after datalogging it, I can't really see any issues.
It was only up and down the street, but the car did its thing.
However, the injector pulse seems to drop at about 3500 upwards.
Might need to do a longer run.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Location:
Perth
Registered:
October 2003
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Re: 1uz on microtech miss
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Sat, 08 January 2005 05:48
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Yeah looks okay, wild RPM fluctuations can signify electrical interference with your crank angle sensor wires which could cause problem like you suggest but rpm is fine. Yeah fuel pump could be a definite candidate, have you checked the filter?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Sat, 08 January 2005 05:53
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Filter is brand new, like 3000km old.
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Location:
Brisbane
Registered:
February 2003
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Re: 1uz on microtech miss
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Sat, 08 January 2005 06:09
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are you sure the TPS is OK? or are you letting your foot off as the engine falters?
if you're simply depressing it down and the engine stumbles at circa 3k rpm then why does the TPS suddenly drop to 0%?
if the pump wasn't up to it, you'd think that any fuel consumption over/above the stumble point woudl be just as bad - an AFR log would show up any lack of fuel (e.g. will run lean above stumble point)?
cheers, charles.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Sat, 08 January 2005 06:12
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| thechuckster wrote on Sat, 08 January 2005 14:09 |
are you sure the TPS is OK? or are you letting your foot off as the engine falters?
if you're simply depressing it down and the engine stumbles at circa 3k rpm then why does the TPS suddenly drop to 0%?
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I changed from 1st to 2nd 
| thechuckster wrote on Sat, 08 January 2005 14:09 |
if the pump wasn't up to it, you'd think that any fuel consumption over/above the stumble point woudl be just as bad - an AFR log would show up any lack of fuel (e.g. will run lean above stumble point)?
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Yeah, it would be the best way to test it, but lack of wideband o2 sensor doesn't help.
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Location:
Brisbane
Registered:
February 2003
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Re: 1uz on microtech miss
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Sat, 08 January 2005 06:41
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if you're flooring it (WoT) during the run to redline, then engine should be rich - even a narrowband O2 sensor will tell you that.
if the fuel pump is off, then it will be lean above the stumble point?
i'd suggest another run monitoring AFR (even if it's just narrowband)? can you get it to plot basic timing and any retard/advance that the ECU is applying to the base timing map?
you had timing issues previously? or was that due to wiring issues from the initial installation?
cheers, charles.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Sat, 08 January 2005 06:52
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No idea what caused this, I only just noticed it earlier in the week.
Narrowband o2 wont be able to help, resolution is not good enough.
I doubt its lean over 4k, I'd just say its not a 12.0:1 like it should. Prolly up closer to 14:1
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1uz on microtech miss
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Sat, 07 May 2005 05:13
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Just a follow up post to say that I just fixed it.
Turns out the Crank Angle Sensor was wired backwards, which I'll go to my grave saying is something I have tried before. 
But I just played around with the cam and crank angle sensor wires in every combination possible (there is only 4, was already running one, and it wouldnt start with 2, which left the last one to be perfect)
So if anyone ever gets an RPM ERROR on a Microtech, its the cam or crank angle sensor backwards.
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Location:
Adelaide
Registered:
May 2003
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Re: 1uz on microtech miss
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Sat, 07 May 2005 07:11
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Hahaha, so yours as well.... seems to be common. When my car first went for its tune the tuner couldnt figure out why the ignition wasnt working properly (happened to be a bullet connector loose) so he fiddled with the CAS wiring, and it always ran weird below 3000ish, with frequent backfires etc.
When i finally got it retuned we found out that the CAS was wired in backwards (theoretically it shouldnt work). After rewiring the CAS it was fine again (until it flamed out.)
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