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2jzgte hesitating under boost


jza800

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have now taken the plugs and coil pack out off the car.. and this is how i looks... first 2 picture is the coil pack on cyl 3 and 4, both have those cracks..

 

picture 3: cyl 1 and 2

picture 4: cyl 3 and 4

picture 5: cyl 5 and 6

 

and on the first coil pack, i could see the pin on the connecter not where all the way it..

IMAG0535.jpg

IMAG0538.jpg

IMAG0539.jpg

IMAG0540.jpg

IMAG0541.jpg

Edited by jza800 (see edit history)
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but there is one ? i dont have gotten any answer on:

 

When the engine light is off, the engine hesitating those 2 times from between 3500rpm to 4500 rpm , all over those rpm range NO hesitating.. i can go full trottle from 1st and up with no hesitating.. i have only notice the hesitating sometimes in 2nd gear and full trottle, but always in 3rd gear at full trottle.. and ONLY those 2 times and between 3500 rpm to 4500 rpm. from 4500 til stock redline at 6500 rpm i cant feel the hesitating, so i dont think it is doing it there..

 

And i can see on the air/fuel gauge that under hesitating it goes lean but maxium 2 sek, then it goes right to rich..

 

When the engine light is ON there is no hesitating what so ever, and pull strong and normal...

 

And here is the air/fuel gauge reading normal, direct to rich under full trottle and the car goes to boost..

 

So what does the ecu change when the engine light turn on? does it change fuel ignition spark fuel or what does it do, since that there is no problem there???

 

i really hope you will take your time to answer that, if you can, or direct someone in here, that could have that answer, as it would help me alot to undestand :)

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I do not know why it is doing this. If I had the car here I could work it out, but without "hands on" it's very hard to guess. Very odd fault!! Reading lean does NOT NOT NOT always mean it IS lean, it do this if it goes very rich due to missing sparks....

 

- - - Updated - - -

 

 

 

I have always used genuine coils, I have never tried any of those, sorry.

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I do not know why it is doing this. If I had the car here I could work it out, but without "hands on" it's very hard to guess. Very odd fault!! Reading lean does NOT NOT NOT always mean it IS lean, it do this if it goes very rich due to missing sparks....

 

- - - Updated - - -

 

 

 

 

I have always used genuine coils, I have never tried any of those, sorry.

 

ok, then it is a hard time to locate the problem.. i will trie first to change the plugs, and reuse the stock coil (i now you think that i stupid, but again that depends off the cost.) then if it work, i will save up to new coil packs for sure.. so dont hate me :D

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Just jumping in on the end of this so sorry if already said

Check battery terminals are nice and tight

 

your more then velcome to jumping in, you could have some answer we other have overseen ;) but the battery terminals are nice and tight.. and battery is new ;)

 

have also taken the compression test, witch is (170 psi/12 bar) on all 6 cylinders, so then we now that there is no problem with piston or valve..

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I now got a hold in my local toyota deeler 800 punds overhere for 6 coil packs, can that really be true? If someone have some experince with aftermaked coils please share you mind :)

 

http://www.garagewhifbitz.co.uk/toyota/supra/ignition-parts.html/garage-whifbitz-568.html

 

http://www.superspark.com.au/producttoyota.htm

Edited by Wez (see edit history)
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i have now tried this on the spark plugs:

 

 

i have done mine on ohm 20k

 

2x 5.5 ohm

 

1x 5.4 ohm

 

1x 5.2 ohm

 

1x 5.0 ohm

 

1x 4.4 ohm

 

can some tell if some of the plugs are bad???

 

i have bourgt new plugs, just what to now if the old plugs was bad the plugs are Denso IK22 Iridium Power Spark Plugs

Edited by jza800 (see edit history)
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