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  #61  
Old June 9th, 2023, 08:08
RCP Phx RCP Phx is offline
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Re: Xj broke down while traveling
Victor I hope you knew to buy Champion Std Copper or equivalent, no fancy plugs on the 4.0!
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  #62  
Old June 9th, 2023, 09:34
Vitzaa Vitzaa is offline
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Re: Xj broke down while traveling
Yes, went with the ngk zfr5n plugs gapped to .035"...

Aside from a dirty idle air controller, anyone know what else could cause a low idle? I'm between 600-700. It's always been like this and I attributed it to the plugs. Now that the plugs are fresh, it's still in the same range. Idles extremely smooth otherwise
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  #63  
Old June 10th, 2023, 21:33
lawsoncl lawsoncl is offline
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Re: Xj broke down while traveling
Got a scanner you can verify the idle rpm? The tach guage might be off.
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  #64  
Old June 11th, 2023, 09:53
maxbraketorque maxbraketorque is offline
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Re: Xj broke down while traveling
Quote:
Originally Posted by Vitzaa View Post
Yes, went with the ngk zfr5n plugs gapped to .035"...

Aside from a dirty idle air controller, anyone know what else could cause a low idle? I'm between 600-700. It's always been like this and I attributed it to the plugs. Now that the plugs are fresh, it's still in the same range. Idles extremely smooth otherwise
My 2000 fed emissions has always idled at ~670 rpm as shown on my OBD-II reader. Very smooth idle.
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  #65  
Old June 13th, 2023, 19:58
Vitzaa Vitzaa is offline
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Re: Xj broke down while traveling
Yup, 670-680... Gonna clean the IAC and see what happens
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