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Go Back JeepForum.com > Models > Jeep Cherokee & Comanche Forums > XJ Cherokee Technical Forum > fuel injector?

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Unread 05-27-2009, 07:22 AM   #1
skip11and1
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fuel injector?

on my 00 XJ when the engine is warm and i got to restart it there it is a rought idle until the engine is running for a few minutes then it goes away. i thought it was a fuel injector so i brought it to a jeep dealer since im stuck down in SC until i get this figured out and they said tht the sleeve on the fuel injector is not working properly and without having to diagnose the entire engine tht is the cheapest thing to change to see if tht does it? does this sound correct?


Last edited by skip11and1; 05-27-2009 at 08:20 AM..
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Unread 05-27-2009, 07:40 AM   #2
skip11and1
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i thought i t was vapor lock but the check engine light keps coming on...im stuck with a 95 15 minutes diganostic charge on top of it...ne one wanna shead ne light on the subject?
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Unread 05-27-2009, 08:20 AM   #3
CJ7-Tim
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What CEL codes are stored ?

The check valve on the fuel pump is prone to failure, leading to a rapid drop in fuel pressure in the fuel rail. With modern oxygenated fuel and the high under-hood temps the Cherokee is known for, vapor lock can happen quickly in the fuel rail. Until the fuel rail refills with cool liquid gasoline, the engine will run rough and possibly misfire. The misfires can generate P0300 series CEL codes. 300 series codes are not fatal and as long as the engine runs properly and you gas MPG is the same as before I would not worry a great deal.

Clean the IAC and TB, add a can of Techron or SeaFoam injector cleaner in the next 2 gas tank fill ups.
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Unread 05-27-2009, 08:36 AM   #4
skip11and1
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im already stuck with the diagnostic charge and he said that the sleeve was malfunctioning and the check engine light keeps comin on i dont know the code number but it said cylinder three misfire..should i jus get it fixed he said it would be like 115 total with the diag. charge so i mines well i guess?
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