Bad Injector.. What Symptoms? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 11 Old 02-27-2006, 01:56 AM Thread Starter
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Bad Injector.. What Symptoms?

i have a feeling i have a stuck injector, what kind of symptons would a stuck injector have? ****ty driveability? would it cause a code?

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post #2 of 11 Old 02-27-2006, 09:10 AM
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If you have a stuck injector, more than likely you should get a misfire code. Unfortunately, a misfire code could be associated with many things. Faulty spark plug(s), wires, egr, coil, injector, O2 sensors, exhaust valve, etc. Best bet would be to pull the codes to see if the computer has recognized any problems. Go from there and start a process of elimination. Keep in mind that sometimes a misfire code can be related to a lean condition causing multiple random misfire. In that case, look for vacuum leaks.


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post #3 of 11 Old 02-27-2006, 10:35 AM
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Stuck closed = misfire, lean condition on that bank O2 (code 41 or 91)

Stuck open = misfire, obvious rich condition, fuel odors, FP leakdown test would fail, rich condition on that bank O2 (code 42 or 92)

Best way to id which one has the problem would be running a Cylinder Balance self-test, or go old-school style disconnecting plug wires/injectors one at a time, and watch for no change in RPM's. My 2ยข.

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post #4 of 11 Old 02-27-2006, 12:55 PM
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I had an injector quit on me once. It just felt like a dead cylinder. Pulled the plug and it was dry and white. Tried a new plug for giggles but that didn't help. Process of elimination lead me to a bad injector so I replaced it. That was the fix.

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post #5 of 11 Old 02-27-2006, 04:24 PM
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I am pretty sure I have a stuck injector on mine. I am gettting fire to plugs but no FIRE. My plug was like a dry black or dark brown. Does not smell like gas. Looks like the plug has been dry firing. I did Cylinder Balance test and came up with no 4 cyl problem. It does feel like a dead cylinder. Idles ok, revs with no load ok, but drive it and you know right away it is not right.
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post #6 of 11 Old 02-27-2006, 10:59 PM
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Quote:
Originally Posted by WhidbeyStang
I am pretty sure I have a stuck injector on mine. I am gettting fire to plugs but no FIRE. My plug was like a dry black or dark brown. Does not smell like gas. Looks like the plug has been dry firing. I did Cylinder Balance test and came up with no 4 cyl problem. It does feel like a dead cylinder. Idles ok, revs with no load ok, but drive it and you know right away it is not right.
mine did the exact same thing......number 8 injector was stuck open.....changed it and it was fine

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post #7 of 11 Old 09-16-2007, 09:23 AM
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Wierd, I've got the exact same problem right now, and my #4 spark plug is the only black one out of all of them. It revs and runs fine, but once you load it up above 4k it misfires. No codes. Looks like i'm going to try to replace that injector.

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post #8 of 11 Old 09-16-2007, 11:55 PM
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Joel the Cly. Balance self-test link is down

Romans 12:2 , 86 GT Bracket Car, 347 carbed/Vic jr's/Parker/ProSys 780/C-4,10.63 @ 125 bullets & Slicks, My dyno is 1320 ft. long.
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post #9 of 11 Old 08-02-2013, 08:56 PM
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Quote:
Originally Posted by Dustang83 View Post
Wierd, I've got the exact same problem right now, and my #4 spark plug is the only black one out of all of them. It revs and runs fine, but once you load it up above 4k it misfires. No codes. Looks like i'm going to try to replace that injector.
Just messaged u about this problem.
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post #10 of 11 Old 08-02-2013, 09:41 PM
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Next time don't revive a really old thread just to tell someone you sent them a PM.


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post #11 of 11 Old 08-05-2013, 12:52 PM
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Next time don't revive a really old thread just to tell someone you sent them a PM.
If im having the same problem and hoping someone might chim in on the problem then why not? Kill two birds with one stone.... Plus isnt that why we use the search function instead of making a new thread.
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