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How do you replace a fuel injector?

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Old Apr 25, 2010 | 01:16 PM
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Default How do you replace a fuel injector?

My RKC seems to have a bad fuel injector, the rear cylinder has some intermittent missing at low rpms. Is this something I can change myself? I see there are places that clean them. Is this worthwhile? Maybe someone can direct me to credible info.

Thanks,

Jay
 
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Old Apr 25, 2010 | 02:30 PM
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Try pulling your codes, it's probably not an injector.
 
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Old Apr 25, 2010 | 03:51 PM
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How did you conclude that it a bad injector? They're not like spark plugs, ya' know! This ain't like the old days.
 
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Old Apr 25, 2010 | 03:57 PM
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Unlikely that it is an injector issue. Review wire going to injector.
Consider review of spark plug cable or something else first.
 
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Old Apr 25, 2010 | 04:31 PM
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More than likley it's a plug or ignition wire.Injector don't usually go bad.
 
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Old Apr 25, 2010 | 05:59 PM
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Originally Posted by NMNSG08
More than likley it's a plug or ignition wire.Injector don't usually go bad.
If im not mistaken, you should be able to get a ohm reading that will tell you if the injector is bad.
 
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Old Apr 25, 2010 | 10:23 PM
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Default Do you have to remove tank to change plug wire?

Thanks for the helpful feedback. My independent shop said it might be a fuel injector or valve problem. I just took a compression reading myself and they are both 150 lbs.

So I want to replace the pluq wires at least. Do I have to remove the gas tank to change the plug wires?
 
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Old Apr 26, 2010 | 12:41 AM
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You can reach in & unplug the injectors w/tank on. I had my rear one go out about 1-2 months ago. With the engine running, if you spray a flamable brake clean into the air intake & see what it does. Mine on the front portion of the throtlle opening would cause it to die but on the rear part I could spray all I wanted to & no change. I unplugged the injector & redid the spray method & that cylinder smoothed out. I then put a noid light on the injector wires & it was flashing the way it was supposed to. Changed out the injectors & it ran ok (pkugges fouled, ETS was bad & needed to readjust the TPS, now it runs better than it ever has but mileage is down to 32 mpg ( was around 45-50). Biggest thing when you pull the tank are the fuel lines, the forward one (pressure is at an angle & easy to cross thread, other than that it was pretty simple.

Toby
 
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Old Jan 30, 2011 | 01:57 PM
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Default Cant remover injector

I have the same problem. Multiple codes for r injector. I pulled of the clamp and lines but I think Im going to break the injector trying to remove it. I have lubed it and can work it back and forth with a crescent wrench. Still wont come out.
1997 mag injection.
 
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Old Jan 30, 2011 | 02:51 PM
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Originally Posted by blueduramax
Thanks for the helpful feedback. My independent shop said it might be a fuel injector or valve problem. I just took a compression reading myself and they are both 150 lbs.

So I want to replace the pluq wires at least. Do I have to remove the gas tank to change the plug wires?
Injectors are pretty damn durable. Haven't replaced the ones in 93 F150 since I bought new w/236K on em.

I am think based on what your indy said you might want to seek out a mechanic. That is of course if they physically checked or did you just describe it to them. Check all the other obvious components 1st. Good luck.
 
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