Yes, here we go again. Sorry, but I'm really trying to summarize my research. I've read just about every post since 2013, on every forum and FB page. I have all the same dreaded codes (I have a 5.0 F type) that signify a bad injector. But it "could" also be an O2 sensor, plugs, MAF, fuel pump, etc. So, not to have you analyze my codes, (they're the same as everyone elses...) I'm just asking is there ANY way to CONFIRM its an injector before diving into that pool? I'm a couple of hundred dollars in towing away from my nearest dealer or indy, and then a couple back, plus their diagnostic fee, just to end up doing the job myself; so is there really any real way for me to know 100% for sure? (and honestly, what would the shop do anyway to "confirm" it?) Thanks!

 

Doug5.0, when I had injector issues with my car, it was running very, very rich (like barely able to idle and then only if I gave it some gas pedal once in awhile to give it more air). The other parts will not cause an over fueling condition that bad. Now, in my case, I suspect that some junk got in the fuel system and caused a fuel injector (#2 as I recall) because a mechanic removed the cross over fuel line and something got inside (my guess, but the only thing I could come up with) So, if you are getting a super rich condition. I was getting the fuel pressure and whatnot error codes saying the sensor and/or fuel pumps were toast. It was just that the fuel injector was open so far that it was exceeding what the fuel system could do.

Do not know if that is making you feel better or not, but that is my situation when I was dealing with a no-run (but engine will crank over) condition.

 

Can you post what codes you have?
That will help.
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Thx. Guess that's what I was trying to avoid. Like I said, its all the same ones everyone else has. 0300, 0305, 1315, 0306, 0307, 0087... All fuel related. "Everyone," (you know, everyone) at least 98% of everyone says fuel injectors. The other 2% says fuel pump, spark plugs, coils, MAF, CATs, even got a "I'm 100% certain" its a bad head gasket. (I have white smoke, too.) I'm just trying to find out if there is any way to KNOW if a fuel injector is bad, before I go spending the $$ to replace it unnecessarily. I did an OHMS test, and they all show same. But that doesn't show that maybe its "working" just not working right... Thanks!

 

Misfires are often air leaks.

P0087 may be what it says it is.

I don't know why you focus on injectors.

 

Hey, open to ideas. Just relaying what the dealer, and 2 indies both said after reading the codes. Plus doing a search on the codes. Like I said, 98% of results say injectors.... So back to the original question; do you know of a way to know for sure? Thanks!

 

What are the symptoms?

 

Doug5.0, the only test that I can think of that you would want to try is to remove the fuel rail from a set of injectors and create a test rig that will clamp on to where the fuel goes in. You would then want to press up your test rig to around 100 psi and then isolate the incoming air. If the pressure drops, you have a leaking injector and therefore it should be replaced. If all 4 injectors on the one side of the engine are leaking at about the same rate, then I would call that a good test. What, I suspect that you are going to find is the 3 of them are going to leak a very little bit (ie, pressure remains fairly constant during hte test) and you are going to have 1 that is going to drop like a rock.

With all of this being said, I think your injectors are kinda the least of your worries. If you have a bad head gasket, I would be going after that first. No sense in worrying about "are my injectors good?" if you have a block that is warped and is worthless. Just calling the situation as I see it. You have an aluminum block. If the head gasket failed, most likely due to overheating which means that there is a high chance that the block and/or atleast 1 of the heads as warped. You have that, it is pretty much time to find a new engine and start all over.

 

Understood. Can you get any fuel pressure readings? Just to rule out a fuel pump problem? I know the car should set low or high fuel pressure codes if they are out of spec but there is a low pressure pump in the tank that might not be feeding the high pressure gear pumps enough volume? Again a guess because this all should set specific codes.

But if you suspect head gaskets there are test kits for around $50 that are quick and easy to do?
Many available and if you can find a shop that does this it should be a very quick and accurate test. So you should be able to eliminate the head gasket idea either way.
If you want to DIY the kits are around usually $40-$50.
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I'm shocked that you get anything like 98% or even 50%.