rough idle poor mileage
#1
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Model: Cherokee
rough idle poor mileage
I recently replaced injector O rings due to a fuel leak, now it idles rough and blows black soot out of the exhaust,at idle.It also has super bad gas mileage,I may have mixed up some of the vacume lines,can you mix up the injector plugs,do you need the clips to hold the boot in place
#2
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Year: 89
Model: Cherokee
Engine: 4.0
i assume it is a 4.0,what year is it? it is hard to mix up the injector electrical wires but it can happen,the metal clip is not needed but should be there. I would look at your vacuum lines,it sounds like you have a vacuum leak. Knowing the year will help.
#3
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Model: Cherokee
Rough Idle
I am shure That some of the vacume lines are not right,it is a 1990 there are no leaks that I can tell,I am at witts end and could really use some help I took off all the injectors and put everything on right,it still idles rough and has very POOR fuel economy,there is black soot on the plugs and on the exhaust pipe and it smell rich,very rich Thanks Paul
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#8
Your exhaust is black and probably smells like gas because its missing.
Check your injector connections, make sure they are in the right order.
You may have also plugged or damaged a tip when you pulled/replaced them.
Good tip is to soak em in injector cleaner before they go back in.
After you get that taken care of check your plugs. They're probably coated with crap, and if you've run it like that for long check your o2 sensor as well.
Hope this helps.
Also, I always tape and number plugs and injectors when I pull em... I know, Newb right. Haha
Check your injector connections, make sure they are in the right order.
You may have also plugged or damaged a tip when you pulled/replaced them.
Good tip is to soak em in injector cleaner before they go back in.
After you get that taken care of check your plugs. They're probably coated with crap, and if you've run it like that for long check your o2 sensor as well.
Hope this helps.
Also, I always tape and number plugs and injectors when I pull em... I know, Newb right. Haha
#10
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Location: Brentwood, TN
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Year: 2001
Model: Cherokee
Engine: 4.0
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