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Registered:
March 2003
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 1JZ-GTE Missing Erratically
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Wed, 21 April 2004 07:35
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What's the general consensus on an engine that misses? Sometimes I cold start the car and it sounds like a lawn mower. cloud of black smoke, rev's like a 2 stroke.
Other times it will just start normally. However, in warm cruising it often misses a few beats now and then. Under boost it doesn't seem to miss though (if it isn't already idling like a 2 stroke).
I have NGK BKR6E with 0.8mm gap, they are fairly new. I'm running a MicroTech LTX12. It runs rich at idle.
My guess is it has to be the spark plugs not gapped properly or fouled (what would cause it to foul, oil on them?) or coil pack moving around. I think I've tracked it down to number 4 cylinder. I did think it was an injector not firing as jiggling the wires stopped it from missing, but the unburnt fuel would say otherwise.
It's really hard to pinpoint, as it only happens every now and then. I thought it could change with temperature if it was sparkplugs, or vibrations moving the coilpacks if that was the problem. All I can really do is jiggle wires, or jiggle the coilpack if it happens again.
[Updated on: Wed, 21 April 2004 07:38]
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: 1JZ-GTE Missing Erratically
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Wed, 21 April 2004 07:51
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It could be one of many things
Dirty spark plugs / incorrectly gapped plugs
Faulty spark plug lead
dirty injector / faulty injector
bad piston rings
coil
single cylinder running wrong mixture due to badly tuned ecu
most likely I would say the spark plugs or leads though...
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Wed, 21 April 2004 08:52
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I've taken the coilpack off and put it back on again. Started it up and it seems fine.
If it does it again i'll have a look at the sparkplugs, and the MicroTech tuning. I may even replace the sparkplugs again.
What other plugs would people recomend? NGK BKR7E with 0.8mm gap?
I have 10PSI, Exhaust, Airfilter, MicroTech, standard intercooler, oil cooler. Estimate 185kw at the wheels. In 2 weeks, larger intercooler and 14PSI.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1JZ-GTE Missing Erratically
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Wed, 21 April 2004 11:41
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It's not gonna be the plugwires, cos there aren't any  Igniter, coils, wires, and ECU. Check all of these properly As well as checking earthing, and that your alternator is working properly... Better yet, ditch the microtech
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Wed, 21 April 2004 11:48
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There is nothing wrong with the MicroTech! Pffft... I think it may have something to do with the main earth wire on the block being ripped off too.
Get rid of the MicroTech, PFFFFFTTTTTTTTTTTT! And get what... an uber expensive Power FC or Motec? Yeah that's thinking. If there was a problem with anyone's MicroTech it's all to do with the tuner.
Hehe. 
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ-GTE Missing Erratically
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Wed, 21 April 2004 23:34
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PowerFC expensive ? Not anymore. Got mine for $1100 new
BKR7E will cause plugs to foul even quicker since they are a colder plug. I'd stick with the BKR6E until you sort out the problem.
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 00:14
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Soarer: That is very cheap! How much was install and tune though? I'm sure not everyone can get them for that price, and availability would be a problem. How much are the handsets? My MicroTech was cheap, and came with good support here in Adelaide.
Back to the plugs. Could it have anything to do with my gapping them improperly? Could they get to a certain heat range and change distance? The next thing will be to get a solid earth straight to the block.
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 04:39
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Install = DIY. Unplug the existing ECU and plonk in the PowerFC. Tuning is $300. Hand controller is around $400.
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 04:49
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So it's still a bit more expensive if you didn't install it yourself. Remember my engine isn't standard in my car. If I could have found one easily when I needed one, and at that price I may have bought it.
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Location:
Gold Coast
Registered:
May 2002
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 06:26
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Yeah I thought that sounded rediculously cheap, and new as well. Normally they are more than that price second hand.
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 06:29
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Wastegate, how many KW does your car make?
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 07:21
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| wastegate wrote on Thu, 22 April 2004 16:18 |
Soarer: Details man! Where did you get the ECU from? where did you get it tuned?
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PM sent. Purchases are legit, products are brand new.
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 07:40
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Where is my PM? 
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 12:23
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| Danish wrote on Thu, 22 April 2004 17:40 |
Where is my PM?
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PM sent
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 12:39
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Hey Send those details my way too !!! - I am seriously considering a power fc very soon.
As for the miss - are those plugs you installed "v - groove" ?
If so throw them away - a couple of 1j's i know , including mine, dod not run happily on them. Misfiring - coughing under random conditions - especially when the engine was cold.
Dont know why - dont really care. Just get some of the older style "normal" electrode NGK's. Fixed all probs straight away.
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 12:42
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Yes, they are NON V Grooved.
Thanks.
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Location:
Sydney
Registered:
May 2002
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Registered:
March 2003
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Re: 1JZ-GTE Missing Erratically
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Thu, 22 April 2004 13:38
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No diagnostics, well not really. The wires look fine too.
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