91 ls400

[Nage]

I have a ls400 that cut out on my way home, it getting gas but no spark, i change the coils disc caps and rotors and it still is not getting spark.

can anyone help.

 

[Lextreme II]

All plug have no spark or only certain bank? Did you say that you changed your coils also? Even with one coil the motor still run but it wont rev.

 

[Edwin_S]

Make sure the igniters have a good ground. Also, check for ECU codes. In the checkbox located on the front of the intake manifold, shortcircuit the "E1" and "TE1" with a short wire. Then get back in the car and see it the Check engine light is flashing, with the ignition on.

 

[Nage]

All plugs no spark. and yes I change the coils, Distributor Caps and rotors, i am lost, the car wan running fine and without warning it cut off. It turnd over great i look to see if the timebelt broke but it's ok. Any help will be great.

 

[Nage]

i Jumped the E1 and TE1 the ck engine did not come on, where do I find the igniters.

 

[ridinglexus]

nage good question i was just about to ask that

 

[Nage]

could it be the computer, and if so where would I find it. and is there anything else that would make it not get spark. when I put a tester light to the input wire to both coils it lights up but when i put the tester in the output of the coils there is no light or juice.

 

[Zuffen]

If you don't have spark on any plugs I would look at the fuses that power the ECU.

I think you may find it simply blew a fuse that powers the ECU so no spark or fuel.

No CEL either.

 

[Edwin_S]

It must be a fuse, or the ecu just died.. If there are no faults the ecu knows about, then the check engine light should atleast flash continiously.

 

[Nick M]

The ECU rarely goes bad. You need a pick up signal or the EFI will not operate.

Are the injectors pusling when you crank the engine?

 

[Nage]

Yes and it getting gas

 

[Lextreme II]

Have read this article? http://www.lextreme.com/Lex DX.pdf

 

[Nage]

Thanks where can i find the articles that is ref.

 

[Nick M]

If you are sure you are getting fuel, but not spark, that does narrow it down.

I don't have your repair manual. But with most Toyotas of that age, fuel will not be delivered unless the ignitor signals to the ECU that the ignition trigger occured.

I would look closer at that distributor system if you are not getting spark.

 

[Nage]

Thanks I will look

 

[Lextreme II]

You might want to check the timing too.

 

[Nage]

No flash from the ck eng light, what is the easy way to ck the timing. i am at a lost, no spark on any plugs.

 

[Nage]

what is a simple way to ck the timing.. i am at a lost

 

[Lextreme II]

If your engine jump a tooth then your timing is off. I know for a fact if the timing is of, the car would not start. However, I am not sure if crank and cam sensor would affect the ignitors or the ignition system via the ECU. This would help http://www.lextreme.com/cams.html

 

[Nage]

thanks again will try tomorrow and let you know.