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Unread 03-11-2012, 05:24 PM   #1
Hunt3r
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1991 XJ Cherokee 
 
Join Date: Feb 2012
Location: White Bear Lake, MN
Posts: 48
did tune up and a fuel injector now runs rough please help

its a 89 xj i did a tune up and changed one fuel injector and the o rings on the rest now it runs really rough it does not wanto accelerate and when you do get it to highway speed you can feel the engine shake like a tire thats out of balance. thank you for any help

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Unread 03-11-2012, 05:25 PM   #2
DoctorTim
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1996 XJ Cherokee 
 
Join Date: Sep 2010
Location: Huntington Beach, CA
Posts: 2,455
make sure you plugged all of the connectors for the fuel injectors.
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Unread 03-11-2012, 05:27 PM   #3
habbyguy
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1996 XJ Cherokee 
 
Join Date: Feb 2010
Location: Mesa, AZ
Posts: 574
It would be really easy to get two of the injector plugs backward. You might try pulling the plugs off the injectors one at a time while the engine's running. If the idle doesn't get worse, you know that injector is part of the problem. If you pull off two plugs that don't make any difference, swap 'em and you're back on the road at 100%.
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Unread 03-11-2012, 05:52 PM   #4
Hunt3r
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1991 XJ Cherokee 
 
Join Date: Feb 2012
Location: White Bear Lake, MN
Posts: 48
Quote:
Originally Posted by habbyguy View Post
It would be really easy to get two of the injector plugs backward. You might try pulling the plugs off the injectors one at a time while the engine's running. If the idle doesn't get worse, you know that injector is part of the problem. If you pull off two plugs that don't make any difference, swap 'em and you're back on the road at 100%.
Thanks a lot it was two of the injector plugs switched around.
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