4urxtc

iTrader: (2)

So I have been having an issue recently with my 1jz auto swap. I have had this car for 2yrs and it just recently started having an issue that is starting to **** me off.

At first my car would have trouble starting
then the idle jumped up and down maybe between 500-1000 few a day or so
After that my car completely died.

So I bought a JZX90 ecu
My friend pulled the harness to inspect it and it seemed fine. So I hoped in and it started. I then let it idle no issues. So we took it on a test drive no issues. Took it out on date night and even ran it hard to see how it would run. No issues. So came home that night and parked it. The very next day left my house and within 500ft of my house the car died at about 20mph. Then just came on out of no where. Then accelerated again and it did it again. Turn around and it died as I pulled into my drive way. Waited a minute and it didnt start again. So waited like 5 mins and it started and I was able to pull in where i normally park.


Now It will start and it won't idle on its own or it will die with throttle applied.
My UEGO is reading 10 afr's or so. It will pop like its back firing.
The car builds boost under minimal throttle like 10%-20% sitting still
The bov will do its job and release pressure as I can hear it.
I had an safc hooked up but I un-hooked it to see if that effected it at all

I have run tests on the ignitor, iacv, injectors and it reads 12v

This just came out of no where and now that it has a different ecu without bleeding caps or any issues that I can see. It seems that it has not effected it at all.

Please help me figure this out. I am completely at a loss.

Thanks

4urxtc

iTrader: (2)

My 1jz is flooding horribly and wont stay on. I don't know how it's producing boost at literally no throttle and fuel is dumping out like crazy.

I just replaced the ecu with a jzx90 from the one I had that had leaking caps.

It does the samething no matter what ecu.

Any ideas on what to look for please

SC400slide

iTrader: (11)

First thing that broke IMO would be the fuel pump ECU.
https://www.clublexus.com/forums/sc-...-few-secs.html
Something fuel.

SC400-V8

iTrader: (1)

He got it before me... Fuel pump ecu for sure.

If it starts stalling even when warmed up and driving for a while, it's probably plugs, caps and rotors.

4urxtc

iTrader: (2)

So you are saying that my car is dumping fuel because it doesnt have a fuel pump mod? This seems interesting and i will double check myself on this too. It should be easy to pull the interior. So why would it cause it to just keep dumping fuel??

My car is coil on pack 1jz

SC400slide

iTrader: (11)

I was thinking the fuel pump ECU itself failed. It is one screw to replace so it's easy. Not talking about the mod, whatever that is...

4urxtc

iTrader: (2)

My car has the fuel pump ecu mod. The 12v mod that bypasses it. So now the question is what else could it be?

SC400slide

iTrader: (11)

Could be something as simple as plugs & wires, but as complex as head gaskets. It just seems like an ECU or fuel ECU thing...

4urxtc

iTrader: (2)

I have changed plugs and the car has coilpacks