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So i went ahead and got another 93' LS ECU and plugged it in and its still doing the same thing. Also it is still throwing a code 48, i went ahead and unplugged the crank position sensor to see if it would throw a code for it and nothing still 48. So i'm thinking maybe my check engine...

How is a good way to look for a bad ECU i popped it open tonight and took a look but everything looked fine. I didn't see any burn marks from leaky capacitors or anything like that, could some capacitors be leaking or faulty but not be showing dramatically? Bryce i'm pretty sure your...

Alright for sure, i will definitely pop the ECU box open tonight and check that out.

Ignitors are definitely Grounded good. My cluster lights/ dash lights do dim rather alarmingly when i try and start it. I have been rather skeptical about my battery but i have charged it everytime i go to work on the car, So hmmmm. My crank position sensor looks slightly newer and the...

Cleaned all 8 spark plugs, put oil in, tried starting it and still nothing. It cranking fine but not firing, it is still having that back pressure problem where there is spurts of air coming out of the IACV and intake manifold in general.

Well i sure hope not, i'm pretty sure they were getting plenty of oil. I had traces of oil coming out of my spark plug tube seals. I'm going to mess with it tonight, clean the spark plugs, fill it with the appropriate amount of oil that is called for with stock filter location and see if it...

***** I really hope not. It still seems to crank fine.

Alright lill daddy i'll definitely keep that in mind, thanks you. So far i've just been double checking connections, power etc... i have also drained all the oil to let it sit and put the oil filter back to stock position and removed the cooler. My plan is to let it sit for a couple days...

That is really good to hear i'm really freaking out on this, so you think a good cleaning or new set of plugs should do the trick? no clogged valves i should have to worry about? Ill definitely try and clean my spark plugs up or go ahead and buy some fresh ones and keep my fingers crossed it...

Grounds - Good. Spark- Good. Fuel - Good. Fuses- Good. It wants to crank but does not fire, I checked my lines for my oil cooler/ relocation and i had them mixed up so i'm pretty sure that a good amount of those 10 quarts of oil were stuck in the motor, does anyone have any experience...

After searching around i found this. 48 - Sub-throttle position sensor signal is 4.3V or higher, or sub-throttle position sensor signal is 0.2V or lower when idle switch is OFF but its for (TRAC OBDI Diagnostic Codes) I'm pretty sure i don't even have traction control. Any ideas...

I checked my codes today and the only code that comes up is code 48, does anyone know what code this is for? I checked the diagnostic code sticky and there is only 47 not 48. i checked multiple times and it was definitely 48. This is the only code its throwing over and over. :confused:

I have recently put a 93' UZ into my 89' Cressida, everything seemed fine it was running good idled fine just had low oil pressure do to a oil cooler and relocation kit. I put 5 quarts on top of the standard 5 quarts needed making 10 quarts in the motor, so i started it and let it idle to see...

Thanks! Haha for sure.

Nice! i cant wait to figure out why its hesitating upon any given throttle. If i want to beat on it ill probably throw in a 350z trans with necessary adapter.

Hi my name is Andrew, i'm 23 years old from the high desert of california. Always liked toyotas and V8's so i decided to put a 1UZ into my 89' cressida. 89' cressida Pulled a 93 UZ from the yard along with a w58 Pulled the 7m out and cleaned up the engine bay...

I just put a 93' ls400 1uzfe into my 89' toyota cressida, i took it around the block for the first time the other day and everytime i go to give it throttle it falls flat on its face (loses all power and sputters). my question to you is, is it a vaccum leak? or maybe a fuel issue? Another...

I HAVE A GOOD WORKING ENGINE COMPUTER FROM A 1991 LS400. IT WAS A GOOD RUNNING CAR. THIS COMPUTER HAS NEVER BEEN OPENED UP, AND THE CASE IS IN GREAT SHAPE. Asking $75 or BEST OFFER. 760-971-7087 text only.