Fuel injectors bad? - Ford Mustang Forum
 
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post #1 of 15 (permalink) Old 01-06-2009 Thread Starter
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Fuel injectors bad?

how do you know if you have a bad fuel injector

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post #2 of 15 (permalink) Old 01-06-2009
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Your car will basically run like crap. It will get slower and the engine won't run as smooth as it would with good injectors, since it won't be combusting properly. Your fuel mileage might suffer too. If your injectors are really old, I would change them. I did it cause the explorer injectors looked new and they atomize the fuel better. Also, there was a piece missing from one of my injectors.

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post #3 of 15 (permalink) Old 01-06-2009
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Can cause fuel pressure drop, and engine to run like crap and not start right.
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post #4 of 15 (permalink) Old 01-07-2009 Thread Starter
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when i drive it has like a bumping feeling when i accelerate and when i drive at idle speed it like jumps back and forth

and also whats the difference between the ohms on the injectors ad height

would these work fine?
ACC-150819

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post #5 of 15 (permalink) Old 01-07-2009
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Those will work as they are for Ford and are HIGH impedence. BUT, why would you pay that much for stock injectors? You might as well get some 24's and you can probably get a used set for cheap.

Back to topic, your problem may not be an injector. Need more info on what it is doing. Is your car a 5 speed?
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post #6 of 15 (permalink) Old 01-07-2009 Thread Starter
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ya its a 5 speed

if i get 24's wouldn't i have to change my mas air meter too?

its hard to explain what its doing but when i drive my car it like jumps back and forth or bounces.

it didn't do it when i dropped the engine in my car but was a little while ago now

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If it does it at an idle crawl, then that would just be slack in the driveline. If it does it while on the throttle then that could be numerous things. Such as (fuel)= fuel injector, fuel pump, ECM, fuel filter,etc. (Spark) bad plugs, bad wires, timing out, bad distributor components etc.
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post #8 of 15 (permalink) Old 01-07-2009 Thread Starter
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im not to sure on what to check cause im not sure if i should get the injectors or not.

i replaced my fuel filter and spark plugs.

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post #9 of 15 (permalink) Old 01-08-2009 Thread Starter
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well i ordered some new injectors is there anything i need to do before i put them in?

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Just lube up the o rings and use dielectric grease when you install them.

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post #11 of 15 (permalink) Old 01-09-2009 Thread Starter
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Quote:
Originally Posted by spdjnky_42 View Post
If it does it at an idle crawl, then that would just be slack in the driveline. If it does it while on the throttle then that could be numerous things. Such as (fuel)= fuel injector, fuel pump, ECM, fuel filter,etc. (Spark) bad plugs, bad wires, timing out, bad distributor components etc.

what exactly do you meen the slack in the driveline

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post #12 of 15 (permalink) Old 01-17-2009 Thread Starter
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i took my upper manifold off and when i got it off there was like water or something in thje middle hole,it didnt smell like radiator fluid to.
does this meen anything?

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post #13 of 15 (permalink) Old 01-18-2009 Thread Starter
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i put the new injectors in and i had to raise my fuel pressure to like 45ish so my car wouldnt die.
but when i drive in second gear it floods out and then goes back to normal.when its not flooded out it drives smoother adn allot faster

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post #14 of 15 (permalink) Old 01-18-2009 Thread Starter
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also when i drive and suddenly push the pedal down to excelerate it like drops out and starts running rough intil i let off the pedal some

anyone kno why?

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post #15 of 15 (permalink) Old 01-18-2009 Thread Starter
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i figured out what my problem was,my MAP sensor was diry.i cleaned it with alcohol,after that it ran perfectly

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