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Location:
Montrose, VIC
Registered:
May 2002
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1UZ small issues
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Mon, 28 April 2003 05:27
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Got the 1UZ going in the ute the other day, but a few small issues:
The fuel return line seems to have nothing coming out of it, and it's running like crap. Is there some kind of 'hot start' solonoid on the pipe somewhere? Buggered if I can see it... But seems to be unable to consistantly get rid of air, heat pressure from the fuel rail, making it sound worse than the 202 that was in there before it! Actually, I lie - that's impossible.
The oil pressure seems to be enormous - screwed a 0-100psi gauge in the oil line, and with a few revs it goes off the dial - Is the gauge crook or do these things run enormous pressure?
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Location:
North Sydney
Registered:
May 2002
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Re: 1UZ small issues
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Mon, 28 April 2003 06:40
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Have you got the vacuum line hooked up to the fuel pressure reg? Sounds like thats happening.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 1UZ small issues
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Mon, 28 April 2003 13:42
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oil pressur eis usually around 40psi for many engines, maybe 60psi max... 10psi is pretty damn high. sure you have the right sender for the gauge?
Cya, Stewart
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Mon, 28 April 2003 14:14
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Yeah I know oil pressure is meant to be much more sensible... that's why I was kind of put off by such high readings.
The gauge is a mechanical one screwed into the oil line, so there's no sender, and I guess it must be crook. The lowest it will read with the engine running is 50psi hot idle - and the engine would have siezed by now if it wasn't gettting oil.
And yes, the vacuum line on the reg is connected... I'm not THAT silly!
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Location:
Sydney
Registered:
July 2002
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Re: 1UZ small issues
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Mon, 28 April 2003 23:35
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What fuel pump are you using?
Sounds like you don't have enough fuel pressure to trigger the return line. This would also make it run crap.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Tue, 29 April 2003 02:14
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I figured that too - for now just running with an old thinners tin full of petrol and a crusty old EFI pump - it's going to run on LPG anyway, just getting things going for now with the current (horrible!) setup. There does seem to be a lot of pressure building up in the fuel line though, it's not like I've gone and picked a 4psi carby pump or anything.
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Location:
Newcastle
Registered:
May 2002
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Re: 1UZ small issues
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Tue, 29 April 2003 03:06
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g'day,
this may sound silly, but are you sure you have the fuel and return lines hooked up the right way round....
had a similar problem with my celica when i first put the new motor in
Cheers
Stew
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Location:
Sydney
Registered:
July 2002
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Re: 1UZ small issues
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Tue, 29 April 2003 04:16
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Which lines are you plugged into? There is a fuel line at the back of the motor, and one on the top of the motor.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Tue, 29 April 2003 09:08
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I presumed the return = the one coming out of the regulator... seems logical!
I pulled the regulator off today, it was actually gummed up, but it still seems that the pump is just too bloody weak to even open it. After all, I only spend about 10 minutes a day on this thing, can't rush our discoveries can we!
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Location:
sydney
Registered:
March 2003
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Re: 1UZ small issues
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Tue, 29 April 2003 13:16
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try squeezin the feed line with yr fingers when the fuel pump is on
u should be able to feel some pressure there if not yr efi pump could be faulty or wired up in reverse
open feal cap and listen to see if its suckin fiuel or blowing bubbles
what efi pump do u have
2nd hand efi pumps do have a problem of being seized from sittin round for ages
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Thu, 01 May 2003 02:45
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Anyways, the pump issue is no big one - the oil pressure is what I was slightly more concerned about. I tried another gauge, and it reads the same... The lowest I can get it to is about 50psi hot idle, otherwise it's over 100psi the whole time.
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Location:
sydney
Registered:
March 2003
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Re: 1UZ small issues
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Thu, 01 May 2003 09:15
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what oil filter u runnin
does it have a relief vsalve inside it
maybe the relief valve in the oil filter or the engine block is blocked or stuck
try runnin genuine toyota oil filter if u r not
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Thu, 01 May 2003 12:17
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Using an external filter block, mounted off hoses run from the original remote filter. The gauge is on the OUTLET side of the filter, so it isn't any kind of filter blockage, and how the hell would a relief valve work inside a filter anyways.... there's no return to the sump. 
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 1UZ small issues
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Thu, 01 May 2003 12:52
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oh dude, before you start the cr again, make sure and double check that you have the hoses coming from the right spots in your block!!!
it sounds like the pump/block exit is going to the exit of the filter, and then trying to get past the drain back seal on the filter.... pull off both hoses, crank the engine once or twice (leads off?) and see which side oil comes out!!!!
good luck, Stewart
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Thu, 01 May 2003 13:23
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Already checked it at least 10 times...
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Location:
sydney
Registered:
March 2003
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Re: 1UZ small issues
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Fri, 02 May 2003 09:12
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any chance of bolting original filter onto the engine and discarding the filter block
so as to get rid of anythin externally that could be caus9ing the problem
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Fri, 02 May 2003 14:42
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Fixed the fuel problem (actually bought another pump, shock horror..), and proceeded to crack a fat burnout in the drive today - no horrible rattles, so it must be getting oil (No, I'm not as ham fisted as that last statement suggests!)
Another thing is, using the Toyota PS pump, Holden PS steering box (yick!), planning to fit a big cooler, but for now filled it up with ATF, and the pump seems awful noisy - are these pumps meant to have something else in them?
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Location:
sydney
Registered:
March 2003
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Re: 1UZ small issues
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Fri, 02 May 2003 15:59
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well if u arent so ham fisted y r u askin for help
all im doing is suggesting stuff for u to try if u want to bag out my ideas dont fukin ask for help
so many forums i goto there is always someone puttin someone else down even thou they r tryin to help
ive probably worked on more jap crap in a year than u have in yr life time so dont rubbish other peoples ideas
they are just tryin to help u and that is y u initially posted
a topic here
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 1UZ small issues
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Sat, 03 May 2003 13:35
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Ooooh... didn't mean to stir up a tantrum!
No offence intended - I was actually originally wondering 2 things:
1. If the 1UZ does in fact use very high oil pressure
2. If there was a hot start valve in the fuel return line
Many comments I make are NOT entirely serious - ask anyone that knows me. I appreciate any suggestions, and don't intend to 'bag out' other's ideas. I sure as hell don't wanna start another 'lets-pick-on-the-guy-with-the-ford-engine' debate. No harm intended!
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