LS400 hickup problem
06-08-12, 04:51 AM
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LS400 hickup problem
Hi guys,
My LS400 has a hickup problem.
It occurs when I drive on the highway with a certain speed and then accellerate more.
The hickup feels like a complete ignition cycle is interrupted, but after it happened the engine still runs silky smooth.
It also sometimes occurs like a low frequency "purr".
I read several posts about LS400 engines with hickups and I already tried using 2 bottles of fuel system (injector) cleaner.
This made the engine run a little bit better, but the hickups didn't dissapear.
I have replaced spark plugs and ignition wires about a month ago, because the engine was running on 7 cylinders, this is now fixed.
I also read about capacitors in the ECU.
As I am an electronic engineer I know about capacitors being the weakest electronic component and I already replaced several in my dashboard.
What do you guys think about replacing the capacitors in the ECU as well?
Or is my "Sexy Lexy" having a different problem?
Thanks!!
My LS400 has a hickup problem.
It occurs when I drive on the highway with a certain speed and then accellerate more.
The hickup feels like a complete ignition cycle is interrupted, but after it happened the engine still runs silky smooth.
It also sometimes occurs like a low frequency "purr".
I read several posts about LS400 engines with hickups and I already tried using 2 bottles of fuel system (injector) cleaner.
This made the engine run a little bit better, but the hickups didn't dissapear.
I have replaced spark plugs and ignition wires about a month ago, because the engine was running on 7 cylinders, this is now fixed.
I also read about capacitors in the ECU.
As I am an electronic engineer I know about capacitors being the weakest electronic component and I already replaced several in my dashboard.
What do you guys think about replacing the capacitors in the ECU as well?
Or is my "Sexy Lexy" having a different problem?
Thanks!!
06-08-12, 06:55 AM
#2
Your car may be experiencing other problems other than the ECU. I have talked to people with bad ECUs and the problems they have experienced were all over the place and usually very random. If you are comfortable with doing the work, I would say check it out. What happens is the capacitors begin to leak onto the board and you know why that is bad. A good throttle body cleaning and a new fuel filter might do you some good. Check out this site. http://www.lexls.com/
Cleaning the throttle body and new fuel filter improved my car.
Cleaning the throttle body and new fuel filter improved my car.
06-09-12, 12:46 AM
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Ok, I will try to clean the throttle house.
The problem is, however, that I was not able to find the gasket for it in Europe, which means that I have to clean it in the still mounted position.
For the ECU, can you (or anybody else) tell me where the ECU is located and how I can remove it?
The problem is, however, that I was not able to find the gasket for it in Europe, which means that I have to clean it in the still mounted position.
For the ECU, can you (or anybody else) tell me where the ECU is located and how I can remove it?
06-09-12, 06:11 AM
#4
Pole Position
Ok, I will try to clean the throttle house.
The problem is, however, that I was not able to find the gasket for it in Europe, which means that I have to clean it in the still mounted position.
For the ECU, can you (or anybody else) tell me where the ECU is located and how I can remove it?
The problem is, however, that I was not able to find the gasket for it in Europe, which means that I have to clean it in the still mounted position.
For the ECU, can you (or anybody else) tell me where the ECU is located and how I can remove it?
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