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Old 09/05/2013, 07:50 AM   #1
bigh2b
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Default 1uz-fe starting problem

i just got a 92 lexus sc400 with the 1uz-fe. it is having trouble starting. it cranks and it gets fuel but no start. it just died when i was driving. started to push the brakes then lost power and died. anyone know what it is??

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Old 09/05/2013, 07:52 AM   #2
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Default Re: 1uz-fe starting problem

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Originally Posted by bigh2b View Post
i just got a 92 lexus sc400 with the 1uz-fe. it is having trouble starting. it cranks and it gets fuel but no start. it just died when i was driving. started to push the brakes then lost power and died. anyone know what it is??
I'd consider pulling a plug and seeing if its getting spark.


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Old 09/05/2013, 08:58 PM   #3
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Default Re: 1uz-fe starting problem

^^ that or just pull the motor out and donate it to me haha

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Old 09/05/2013, 09:56 PM   #4
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Default Re: 1uz-fe starting problem

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Originally Posted by bigh2b View Post
i just got a 92 lexus sc400 with the 1uz-fe. it is having trouble starting. it cranks and it gets fuel but no start. it just died when i was driving. started to push the brakes then lost power and died. anyone know what it is??
Here is the million question game....follow along and try answering as man as possible...

Does it happen all the time or this is the first time....as in did it do it when you first got it or hasn't until now?

All fluids check out ok...oil, coolant etc?

Have you tested the battery to make it is good while car is off and on...like as you crank it over?

How did you determine it is getting fuel, can you hear the fuel pump prime?

Have you checked to see if it has any stored codes that could point you in the right direction?

Have you checked for spark to see if you have any?

Once you do check if you didn't have any I would start looking towards either the crank or cam sensors. Generally when these sensors go out they act as if there is no spark at all because the cam and crank have no way of throwing the signal to the ecu in order for it to fire at the correct time frame.

There isn't enough information to determine what your starting issue is as it could be related to grounds, starter, battery, fuel, sensors etc. etc. You will need to get a few of those questions answered for us to TRY and determine a possible cause.....it is VERY VERY VERY hard to diagnose a vehicle via a forum.

Let us know what you find.....


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Old 09/06/2013, 08:16 AM   #5
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Default Re: 1uz-fe starting problem

i haven't checked the spark yet cause it been very hot where i live. the reason it stopped was i was just driving along when i was going down a hill stepping on the brakes slowly and it just died so i pulled over. i found it very odd. it hasn't started since. oil and coolant check out okay.

i put a brand new battery in it so its fine.

i smell fuel in the engine bay and hear it flooding a bit when starting.

haven't checked any codes for it cause its obd1 so its a bit harder to do.

i might check the cam and crank sensor quick today, i've heard those like to come loose or short out by those sensors.



thats all i know at this point. thanks

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Old 09/06/2013, 08:22 AM   #6
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Default Re: 1uz-fe starting problem

another important thing to know is the car only has 140k original miles.........i think thats low for a lexus to break down.....

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Old 09/06/2013, 09:41 AM   #7
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Default Re: 1uz-fe starting problem

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Originally Posted by bigh2b View Post
i haven't checked the spark yet cause it been very hot where i live. the reason it stopped was i was just driving along when i was going down a hill stepping on the brakes slowly and it just died so i pulled over. i found it very odd. it hasn't started since. oil and coolant check out okay.

i put a brand new battery in it so its fine.

i smell fuel in the engine bay and hear it flooding a bit when starting.

haven't checked any codes for it cause its obd1 so its a bit harder to do.

i might check the cam and crank sensor quick today, i've heard those like to come loose or short out by those sensors.



thats all i know at this point. thanks
Sooo what you're saying is, you just think it's getting fuel but you don't know that one for sure.

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Old 09/06/2013, 09:42 AM   #8
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Default Re: 1uz-fe starting problem

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Originally Posted by bigh2b View Post
another important thing to know is the car only has 140k original miles.........i think thats low for a lexus to break down.....
I've seen those break down at 80k miles. All depends on how well it was taken care of, plus sometimes you'll get things that break just because of age and not because of how many miles are on it.

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Old 09/06/2013, 10:11 AM   #9
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Default Re: 1uz-fe starting problem

i just checked and it is getting fuel to the fuel filter. so it is coming up that far. it was taken very good care of so i dont think its something like that

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Old 09/06/2013, 01:58 PM   #10
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Default Re: 1uz-fe starting problem

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i just checked and it is getting fuel to the fuel filter. so it is coming up that far. it was taken very good care of so i dont think its something like that
Now by "well taken care of" do you mean the previous owner did every necessary service interval needed with ALL service records available? So they replaced parts that are known to cause issues from 1992 until now? Or is it "well taken care of" because the owner said so?

Not trying to bust your balls but honestly if it was well taken care of then there shouldn't be a sudden issue with it. There are parts on that engine that probably haven't seen any changes since 1992, so it is hard to believe a car of this year is very well taken care of. You would have to show all records of everything on that car that has been changed to convince anyone of that. I am working on a vehicle at the moment that was built in 2003 that has recently had a cam sensor replaced by me, the crank sensor by another shop and I am getting it back before she sells it to replace another sensor related to the P0011 code she keeps getting which is the main sensor for the cam......and she is first owner since 03. All has been taken well care of since she bought it......so why am I replacing the sensors on a car that is only 10 years old? See what i mean?....

Yes oil changes are great when done on the proper interval...yes it is great they replaced wheel bearings, tie rods, flushed tranny and had new fluid put in, yes it is great that they kept up with that.....but what about everything else? Like heater hoses, vacuum hoses, sensors that have been in place from factory etc etc. That is why we need you to make sure and check it all before moving forward, otherwise we are shooting darts in the dark and hoping we can land one on the right spot.

Last edited by importsusa; 09/06/2013 at 10:18 PM.

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Old 09/17/2013, 08:45 AM   #11
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Default Re: 1uz-fe starting problem

i mean it was taken care to a degree. i now see that parts have failed on it also, the timing belt was changed at 78k the first time, after taking off the cover i have discovered that the timing belt is shreded! That was not a good to see but now i have discovered the problem. i am having a new belt put in this week. i glad its a non- interference motor!

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Old 09/17/2013, 09:16 AM   #12
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Default Re: 1uz-fe starting problem

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Originally Posted by bigh2b View Post
i mean it was taken care to a degree. i now see that parts have failed on it also, the timing belt was changed at 78k the first time, after taking off the cover i have discovered that the timing belt is shreded! That was not a good to see but now i have discovered the problem. i am having a new belt put in this week. i glad its a non- interference motor!
Yeah that would of been a disaster for sure....I would still get a leak down test done to it when you can to really make sure the pistons didn't hit one of the valves.
As I mentioned before, it is hard for me to hear people say a car is well taken care of when there is no proof of vehicle records etc. You definitely got lucky for sure.....now all you gotta make sure is to change the following: timing belt, any of the idler/tensioner pulleys (if applicable), any arms or hydraulic tensioners (again if applicable) and the water pump (and a little sealant for extra seal)......basically ANYTHING that is within the timing belt area should NOT be over looked. Then make sure all receipts and what not are saved and heck, even go as far as taking pics and noting on the block the date it was done on. This will be your peace of mind AND can be a great selling point in the future if you wish to get rid of it.

People always think they can bypass certain things and well, it comes and bites them on the ass later on.....always take your time and research ALL things needed that could potentially put you back to square one. You'd be amazed at how many people I've had go through my shop repairing the same crap they just got done bot ling ago.....all because they thought to save some change by reusing the old parts with new.

Either way, you are your best weapon in the end when it comes to fixing your car.....or your worst enemy....lol.

Good luck and keep us on the loop when done and running.

Last edited by importsusa; 09/17/2013 at 09:18 AM.

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Old 10/29/2013, 07:41 AM   #13
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Default Re: 1uz-fe starting problem

car finally starts and drives excellent!! no hesitation on start up or anything!! new timing belt and water pump was all that was needed!

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