460 engine problems
As stated earlier, plugged CATs and it won't rev. That doesn't mean they are working effectively but if it will do 260, not plugged CATs.
You need to look at the fuel trims. It will tell exactly what is happening.
Plot calculated engine load, MAF, RPM, LTFT, STFT, IGN advance and if possible, cam angles, and knock sensor and or spark retard.
The engine will tell why it is happy one moment and ill the next.
You need to look at the fuel trims. It will tell exactly what is happening.
Plot calculated engine load, MAF, RPM, LTFT, STFT, IGN advance and if possible, cam angles, and knock sensor and or spark retard.
The engine will tell why it is happy one moment and ill the next.
Pole Position
Joined: Oct 2014
Posts: 2,561
Likes: 365
From: New Hampshire
The car has two fuel systems, one of them isn't working right. That's my opinion after you said it's hard to start, lean codes, driveability issues, etc.
The mechanical pumps have to control the fuel line pressure in that portion of the system, doesn't sound like that's happening.
The mechanical pumps have to control the fuel line pressure in that portion of the system, doesn't sound like that's happening.
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Pole Position
Joined: Nov 2001
Posts: 318
Likes: 0
From: Hamburg, Germany
Hi,
changed the crank position sensor and nothing changed.
I changed the o2 Sensors and car seemed to run fine for couple of hours, but error returned!
At changing the o2 sensors i noticed that both sides had different temperatures. one was colder.
Christian
changed the crank position sensor and nothing changed.
I changed the o2 Sensors and car seemed to run fine for couple of hours, but error returned!
At changing the o2 sensors i noticed that both sides had different temperatures. one was colder.
Christian
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LexusOz
LS - 4th Gen (2007-2017)
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Nov 7, 2017 12:36 AM
