1jzgte vvti turning off

[joooeone]

yup thats true to many codes some are from automatic tranny wich is the limit of boost on the 1jz because im getting 10 psi and then it turns off.....i need to change the baterry to the one that i got is fuck up and how can i check if the coils are bad or the wires are bad?

[George]

up to my experience normal stock boost is about 0.7bar, and may reach as high as 0.9 bar in peaks. Have no idea what it could be in psi.

[dumbass]

times bar by 14 will give u psi

[George]

So looks like 10psi is normal maximal boost for this engine type (while it's still good to make sure that boost gauge itself is ok)

joooeone normally you need an oscilloscope and special probe to do that, which is apparently not your case. It would be the best to find another 1jz-gte/2jz-gte (jzx100,110,jzs161 would be fine) and borrow coil packs and wires for a while.

There's another quick test for coil packs, they have blue rubber things on them. Remove them and check for coil pack cracks. If you see even smallest ones then your coil is 100% fkd up (it may still run good with 2jz-ge or 1jz-gte at low boost).

You can temporarily fix the cracks (if any) with epoxy glue, just for diagnostic purposes. Also make sure there's no oil and dirt around coil packs and plugs, treat with white spirit or another solvent if necessary.

note there's yet another scenario for misfire at high boost/high rpm, that's lack of fuel/lean mixture. That's advisable to check fuel pressure in the conditions when engine turns off. If fuel pressure drops then it's likely to cause your problem (expect something around 40 psi, with lower pressure at low rpm/no boost). While some ignition component may still be a bit fkd up, and there may be a whole bunch of other problems acting together.

[joooeone]

This only happens add high boost and not in high rpm s I will go and check if the coils are crack

[George]

joooeone I would highly recommend that you first see which of your codes appears at the same time engine stops (which one is "new" then)
In your code list I can see some strange things (other than ignition system error):
1 - there's no #31 and #24 codes which would indicate wrong or no MAF
2 - you have #22 (coolant temp sensor) and #41 (throttle position sensor) codes at the same time. These two sensors share E2 terminal of the ECU - make sure its wire (usually brown colored) is not broken somewhere.
3 - there's no code for "manifold pressure too high" which would indicate exceeding boost limit

[dumbass]

disconnect battery for few minutes and road test again then recheck for codes
too many codes there so maybe its just saved those codes from pulling everythign off while testing
but u might be on right track if its wrong air flow meter
just buy new one from toyota only 250 bucks

[joooeone]

yes i actually got the rigth maf now its the small one not the big one that lexus uses the code 41 is because i got the etcs-i what we did it was open up where the gears took on gear off the one conecting the small motor for the throttle and then open up the tps and if you see corectly when you pull the wire for the throttle it opens up a liltle bit so if you flip the piece of metal that make contact to the throttle it will start opening from begening to end kinda like this so instted of spending 400 dlls on buying this kit we did it our self ¡Ú³ÚÅ·»Ô¾ì¡Û¥¹¥í¥Ã¥È¥ë¥³¥ó¥Ð¡¼¥ÈKIT¡ÊJZX110/JZS171ÍÑ¡Ë¥Þ¡¼¥¯II/¥ô¥§¥í¥Ã¥µ/¥¯¥é¥¦¥ó¡Ú1202lfs-y¡Û¡§¥×¥ì¥ß¥¢¥à¥¸¥ã¥Ñ¥ó³ÚÅ·»Ô¾ìŹ

[joooeone]

allright we did the test in the first run we got the next error codes 22 46 62 63 65 68 76 77 89 and after ti turn off runing 22 46 62 63 65 68 76 77 78 88 so new codes are 78 88 the code 78 is fuel pump i think i conected a walbro fuel pump

[George]

78 stands for 2nd fuel pump relay, which is used when engine does not need maximum pump performance so it could be slowed down. You don't really need this relay. But just to disable error 78, you may connect relay inputs as per wiring diagram (so only ECU sees it and 'clicks' it, but the relay doesn't actually switch anything).

try connecting both fuel pump relays per your wiring diagram and make sure they both operate and there's no 78 error code. You may temporarily run your fuel pump right off ignition switch just to make sure it's not the reason for engine turning off.

p/s I suppose it's your typing mistake that code 88 appeared instead of 89

[dumbass]

did u fk with the fly by wire butterfly

[joooeone]

george i dint pull the codes my friends did it for me because i was at work so they probably miss a number or something,we are not using the jzs171 fuse box anymore we are using the cressida one


dumbass yes we did and its working really good i will post some pictures later

[George]

can't see how my message was related to some fuse box but ok :-)

[dumbass]

is it still fly by wire
i dont understand y u had to fuk with it
i know u were not getting throttle in the first place
but if the ecu is fly by wire u should not have to fk with the throttle body

ive done about 10 2jvvti motors and never had to touch the butterfly
anyway it might be something witht hat it might not just that fbw ecus are abit more
sensative when it comes to certain errors and can easily shut down the ecu

yr motor should only have 1 butterfly right
im pretty sure it doesnt have an extra traction control butterfly like the early 1j

anyway nothing more i can help with if u fked with the butterfly as u dont know what the ecu is seeing

[joooeone]

george yeah your were taking about some relays


dumbass if i want i could put it back like it was but its working really good check the internet page that i posted up on top they sell a kit to turn a fly by wire to a mechanical one