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The only way the engine can rev up is it must get air. Are you sure the throttle is closed to the idle stop? Is the IDLE (IDL) pin to the ECU grounded by the TPS sensor? I have a US spec 93 LS400 Engine ECU and trans in my 83 Celica and just got it running a few weeks ago. My minor problem is...

As far as I remember from the LS400 manuals (I don't have them here) the 1UZ has a rev limiter and a top speed limiter. My guess is that the top speed limiter is being triggered. If your wiring harness is completely stock, I would look for a point where it may have been pinched or cut. I would...

As far as I can tell the cold start injector system is working fine. It fires off on just a touch of the key. The volt and ohm readings in the Lexus book check out for the cold start injector, and I think it only fires during cranking when dead cold. So I don't think that is the issue. The TPS...

My freshly running 1UZ Celica is having one problem. It does not have a cold high idle. It fires up fine, but will die unless you put your foot on the gas a bit to keep the revs up. Once it is holding fairly steady, you can lift your foot and it will stay running, but at just 450 rpm or so until...

If the flow maps are matched up properly to the motor, you can achieve the same intake temps with either a single or twin setup. It all comes down to where in the flow range of a turbo you are running. If you make tight short manifold and place a small turbo at each head, then I think a twin...

My choice of the Lexus 1UZ was pretty easy. I had to run a toyota sourced motor due to racing class rules in SCCA. Add to that the California engine change rules, and it had to be from a rear drive CAR, not a truck and be newer than the chassis. That left me with basically 2 motors. A 2JZ or a...

I did some searching and I found that my A341E trans ratios are wrong. And this does make a huge difference in my calculations. Here ios what seems to be the correct ratios. 1st 2.531 2nd 1.531 3rd 1.000 4th 0.705 SO....... My trans input shaft rpm at 70 mph is now 5966 rpm. Now the...

I don't know how your linkage lines up, but I used a 1983 Celica auto trans shifter in my 1UZ conversion, and the detents lined up perfect for all positions 1-2-D-N-R-P in the A341E trans. It does not have a tip-tronic gate, but you can put a pair of buttons anywhere. On the steering wheel...

I have not touched my car since my last post, but some work has happened. The whole exhaust system is done. Charlie says you can barely even hear it idle with the cats and DynoMax UltraFlow muffler on it. It starts very easy, but he has to keep his foot on the gas to keep it running for the...

Sorry, this got pretty long, I guess I can chime in a bit with my turbo experience. I have to agree on the stand alone EFI system. From all the people I know that have tried to add a turbo on the cheap, anything over 6 psi of boost is just asking for trouble with a piggy back system. I ran an...

Your compression ratio may be a concern for turbo duty. Unless you are running race gas or alcohol, compression should be under 9.0 to 1 for even minor boost. With a small cam and poor flowing head, I was able to run 12 psi on 9.0 compression before ping set in on 93 octane pump gas. Once I...

My stock wheels are 7 inches wide with an 8 mm positive offset and a 4 on 4.5 inch bolt pattern. The only sorta off the shelf wheel that might fit is a Kosie K1, custom drilled and center bored. They have a 16 inch rims in 7.5 inch or 8.5 inch width and a 12 mm offset. I have to do careful...

Here are the tires I race on http://www.tirerack.com/tires/Spec.jsp?make=Hoosier&model=A6&tirePageLocQty= I currently have just 14 x 7 inch rims. If I go to a different tire package, I would like to go wider, and as you can see from the listing, the 225 50 14 is very wide for its UTQG sizing...

Maybe the ratio chart I have for the trans is wrong then. I got it off of the Lextreme site, but I can't find it now. My current Hoosier race tires (225 50 14) have to turn at 1045.5 rpm at 70 mph. That comes out to 3896.75 rpm at the drive shaft with my 3.727 ratio. The ratio chart for the...

How high can we safely rev a stock 1993 LS400 motor? With the stock ECU or a programmable?? Now that my 1UZ Celica is up and running, I am thinking about "improvements". My main use for the car is autocross racing. The events are run on very tight courses made up of traffic cones in a large...

Are you getting a check engine light, even as it is not revving? Did you check for error codes in the ECU? It either has to be loosing fuel or spark. Does the tach hold at 3800 and follow the motor till it fires again? Or does the tach drop when it quits? If you have a bad crank or cam position...

I recently got my 93 LS400 motor up and running in my 83 Celica. I am very interested in what you end up finding as my motor seems to be doing something similar. It fires up very quickly when I turn the key, but it won't stay running unless I put my foot on the throttle a bit and rev it a few...

How nice is the rest of the car? Is it worth fixing right or do you want to make it look and drive OK for less money? I got hit in the front end on my 1983 Celica GT-S and the insurance just wanted to total it out and pay me next to nothing for it. I have thousands of dollars in the engine and...

Just let me know what they want for a pair of gaskets. As long as the cost is not silly, count me in for a pair. Another possibility, is Remflex may sell bulk material, if your guys can cut it out. From the description, it sounds like a good utility knife will cut this stuff. Gary M.

On my left hand drive US 83 Celica RA65, (firewall should be very similar to MA6X Supra) the brake booster just cleared the head. I figure it is about 1/4 inch between there. As far as I can tell the engine is dead level left to right and centered between the strut towers. It is set quite low on...