how to tell if Bad injector, NO CEL - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 08-06-2009, 06:41 PM Thread Starter
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how to tell if Bad injector, NO CEL

Is it at all possiable to tell just by listing if you have an injector that is not firing or going bad? When im at idle it sounds like an injector is not firing or missing. any help would be great, NO CEL at anytime. thxs I will try and get audio and post it later
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post #2 of 16 Old 08-08-2009, 01:55 PM Thread Starter
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for some help
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post #3 of 16 Old 08-08-2009, 01:59 PM
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Sometimes you can hear/feel a miss in the injectors. Find someone with a real scan tool then can do a couple of test that can tell you.

Where you located? Maybe someone hear is close that might be able to help you out.

Also its always nice to know what year, mods your done to the truck.

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post #4 of 16 Old 08-08-2009, 02:06 PM
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I just got done doin injectors 4 times over cause my friend gave me dead ones...I think its possible to hear a misfiring injector just cause now since I have full injectors. A big deal breaker is start up in my opinion. If its idling really rough at the start/generally a cold start I would guess injector. You can get OBD II readers for $160 and they can tell you what injectors are firing at. Hell, my autozone has OBD II and they do it for free. Maybe yours will too?


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post #5 of 16 Old 08-10-2009, 12:20 AM Thread Starter
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cool thanks i live in phx az near 83rd ave and mcdowell rd, i have a diesel innovations programer banks big head W/G actuator and 5" exhaust straight through. in idle it is fine but can hear what seems to sound like a slight knock.

not sure if this will help when i first got the programmer it had lots of get up and go, now it seams to be sluggish
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post #6 of 16 Old 08-10-2009, 06:39 PM
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when is the last time u changed the fuel filter?

Excursion 02 4x4 Silverline exaust superchip tuner

Excursion 2000 4x4 300K miles 238/100 P.I.S. Injectors 38RW/ billet wheel dyno proven tunes

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post #7 of 16 Old 08-11-2009, 12:00 AM Thread Starter
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about a month ago now, it wouldn't go bad that quick would it
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post #8 of 16 Old 08-11-2009, 07:33 AM
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not usually but it is possible if u had some dirty fuel

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post #9 of 16 Old 08-11-2009, 08:35 AM
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you can also use a temp gun on individual runners on the exhaust maifold and look for the one that is coolder than the rest but the engine must be cold to start with and eventually the heat from the good cylinders will heat up the whole manifold then its back to square one waiting for it to cool off

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post #10 of 16 Old 08-11-2009, 08:43 AM
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or (pore boy tech)if u don’t have a heat gun u can use water in a small squirt gun and shoot it on each runner and the one that evaporates the slowest is a dead cylinder.

Excursion 02 4x4 Silverline exaust superchip tuner

Excursion 2000 4x4 300K miles 238/100 P.I.S. Injectors 38RW/ billet wheel dyno proven tunes

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