1UZ Idle issues

[Kush]

if u think u have fuel pressure problem just go buy a 10 dollar plastic clearish fuel filter
fit it to the return line from engine to surge tank
the clearish ones u can see the fuel returning and this gives u a rough guide on how much flow u have on the return

instead of replacing parts just get multimeter and measure the tps wire and the coolant temp wire
also maybe there is a wiring issue as no backup battery power to ecu will affect yr idle motor settings
also how yr efi relay is wired can affect things too as if its not right yr idle motor wont reset when u turn engine off
most fo these problems are due to pisspoor wiring when the conversion gets done
its easy to get motor running but to do it nice and correct takes abit more effort

if u want to pay someone to fix it up bring it down to gold coast and ill fix it for u

Will look into that stuff man, cheers

[dumbass]

I'm 200% sure it won't start if fuel lines are round wrong way
If it was perfect before u changed tanks then put a fuel pressure gauge on it and drive round for abit

If its not fuel related then u have disturbed something else

[Kush]

Was doing some research and my return lines are wrong. I've had the return from the engine, going straight to the fuel tank instead of the surge tank..
I'm not running a charcoal canister so where do I run a line from fitting (1) to?

[dumbass]

there is afew differnet theories with where to run return
if u run it to surge tank it fills the surge tank aswell so uless chance tio run out of fuel
but the fuel can get warm as it returns from engine warm

if u return it to the tank then the surge is always getting the cold fuel from the tank

ive always returned it to the surge tank

if u return it to the tank and u have problems filling the surge tank then u have problems with pickup in tank or the prime pump

I always tell guys to spend 200 bucks more and get a swirl pot and pump fitted inside the tank and get it all done properly
then u don't have this problem

[Kush]

Yeah man, I'm going to re route the return lines the way you have mentioned tomorrow. Do you know any places that fit swirl pots/internal fuel pumps in long range tanks?

And where should I run the fuel tank breather as I don't have a charcoal canister anymore..

[Kush]

All hoses are run as they should be but still no change in idle.. Cold start still at 300-500RPM

[dumbass]

I would pull lid off ecu and check for bad capacitors
and still put a pressure gauge on it
or check for good fuel flow down the return

[Kush]

Checked the ECU and everything was fine there. No bad or leaking capacitors. The ECU has a sticker on it and was only tested in October '12.
There is strong fuel flow from the return hose

Would it be smart to adjust the TPS sensor? Have read this article: http://www.lexls.com/tutorials/EFI/tps.html
But some say that the TPS should not have to be adjusted etc?

[Kush]

Does anyone know where to buy a new fuel pressure regulator for my 92 soarer UZZ31? Have called Toyota and the part will be on backorder from Japan and will take about a month to get.

Any aftermarket or universal one available that mount/attach to factory location?

[dumbass]

Have u checked fuel pressure
I've never seen a 1uz press reg fail

[Kush]

The fuel flow out the return hose is very strong and steady. There's a hissing sort of noise coming from the regulator and sounds like the fuel is pulsing.. I took the vacuum hose off the FPR to see if fuel was getting into it but all good and the idle had also increased when hose was removed.. So maybe internal diaphragm is stuffed?