1990 XJ40 4.0L rough idle
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Conrad House (11-22-2011)
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Conrad:
Yes, you could be in for a good TB cleaning. Is the Check Engine Light on and, if so, what code does the VCM show when you turn off the engine, turn the key to position II (just before starting), and press the button?
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Scott
Yes, you could be in for a good TB cleaning. Is the Check Engine Light on and, if so, what code does the VCM show when you turn off the engine, turn the key to position II (just before starting), and press the button?
Don't forget to introduce yourself to the forum in the correct place, and welcome!
Scott
Last edited by MidwestJag; 11-22-2011 at 08:21 AM. Reason: misspelling
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Conrad House (11-22-2011)
#5
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Conrad:
Yes, you could be in for a good TB cleaning. Is the Check Engine Light on and, if so, what code does the VCM show when you turn off the engine, turn the key to position II (just before starting), and press the button?
Don't forget to introduce yourself to the forum in the correct place, and welcome!
Scott
Yes, you could be in for a good TB cleaning. Is the Check Engine Light on and, if so, what code does the VCM show when you turn off the engine, turn the key to position II (just before starting), and press the button?
Don't forget to introduce yourself to the forum in the correct place, and welcome!
Scott
#6
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Conrad:
Hmmm... I don't think I would be satisfied with a perpetual Check Engine Light, but that's just me. Some CELs have multiple possible causes, and tracking down a fault may take more time than both owner or mechanic has patience for!
I am not all that familiar with fuse fails. I'm not sure I was even aware the VCM indicated those! I was hoping for it to indicate a "Fuel Fail" with a number which, probably, would have been much more helpful in solving your irregular idle. I would double check that and it wouldn't be a bad idea to get the more specific codes (probably from a mechanic, unless you have a code reader) from the CEL.
Although I have never personally cleaned my own throttle body, I know lots of guys have. Perhaps some of them can chime in to give you pointers. I do know that you should take great care to to disturb (don't loosen) the red Throttle Position Sensor on the bottom. It needs to be properly placed in order to work. It can, though, be disconnected and removed with the TB.
Cheers!
Scott
Hmmm... I don't think I would be satisfied with a perpetual Check Engine Light, but that's just me. Some CELs have multiple possible causes, and tracking down a fault may take more time than both owner or mechanic has patience for!
I am not all that familiar with fuse fails. I'm not sure I was even aware the VCM indicated those! I was hoping for it to indicate a "Fuel Fail" with a number which, probably, would have been much more helpful in solving your irregular idle. I would double check that and it wouldn't be a bad idea to get the more specific codes (probably from a mechanic, unless you have a code reader) from the CEL.
Although I have never personally cleaned my own throttle body, I know lots of guys have. Perhaps some of them can chime in to give you pointers. I do know that you should take great care to to disturb (don't loosen) the red Throttle Position Sensor on the bottom. It needs to be properly placed in order to work. It can, though, be disconnected and removed with the TB.
Cheers!
Scott
#7
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There are a few fuse locations , driver's foot side, passenger side, under armrest . I believe you need to remove the cover and have the fuses checked . Fuse 1 says there is a faulty fuse at that location (I don't remember which is which ,sorry . )
Still, I don't think erratic idling has anything to do with the fuse failure .I also get Check engine light time to time and when I press the VCM nothing happens lol
Still, I don't think erratic idling has anything to do with the fuse failure .I also get Check engine light time to time and when I press the VCM nothing happens lol
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Cadillac (11-24-2011)
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