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Fox T-Bird/Cougar Forums

Technical => Engine Tech => Topic started by: CougarCoupe88 on October 04, 2005, 12:12:25 PM

Title: cleaning injectors.
Post by: CougarCoupe88 on October 04, 2005, 12:12:25 PM
while my injectors are out can i just spray the hell out of them with carb cleaner. and blow them out with an air hose?  in case they are cloged?
Title: Re: cleaning injectors.
Post by: V8Demon on October 04, 2005, 07:18:39 PM
I wouldn't recommend carb cleaner.  It eats many types of plastics (including vinyl siding :D )  I'd recommend one of those cleaner kits you hook up to a vacuum line and let the motor run for a while.
Title: Re: cleaning injectors.
Post by: Bird351 on October 04, 2005, 07:34:16 PM
I soaked a set of mine in paint thinner for a couple days, and then rinsed them out in a little bit of gasoline. Gotta replace any O-ring that remains on the injector while it's being soaked, though.. they harden up in the paint thinner.
Title: Re: cleaning injectors.
Post by: 5.0willgo on October 04, 2005, 07:39:40 PM
quoted from General Car work and things (http://www.foxtbirdcougarforums.com/showthread.php?t=2984) by jcassity

Quote
fuel injector cleaning
remove the cfi from intake
split the cfi in half via three phillups bolts from the bottom.
,, removed the lower injector retainer (be careful on the screw or you will be taping a new hole).

gently pull the injector out (keep track of your smaller orings).

take a pointed tip screw start this screw into the brass bushing just at the top of the injector until it started to grab real good.

grab the screw with pliers and pulled real hard and out pops the injector screen that is molded to the brass bushing.

spray the injector screen assy down with starting fluid or something.

Next, blast it with the air compressor.

insert the screen assy back into the top of the injectors,, turn the injector upside down and tap it on the workbench which will seat the brass bushing part back in its seat.

re-install the injectors and man does make a difference.

the screen assy is only about a half inch long and about 3/16 in diameter. Pretty fragile looking also. I re-shaped the screen on one becase it was a bit sucked together. I re-shaped it with a small ink pen insert.


I never cleaned injectors.
Title: Re: cleaning injectors.
Post by: black ct on October 04, 2005, 08:23:43 PM
Injector cleaning how-to (http://fordfuelinjection.com/index.php?p=82)
 This site is a must read for any fuel injected Ford enthusiast.
 :canada:
Title: Re: cleaning injectors.
Post by: CougarCoupe88 on October 04, 2005, 11:33:48 PM
thans for the tips and links im gonna clean em tomorrow
Title: Re: cleaning injectors.
Post by: JKATHRE on October 06, 2005, 08:45:14 PM
Rats!

I just redid all the o rings and pintle caps on my Lincoln earlier this year.  Thought I was brilliant but never thought about any screens.  Wish I had seen this 6 months ago.    Well, I can look forward to the Tbird.  None of the injectors on the TBird have leaked yet.  The Lincoln had 4 leaks inside of 7 years.  Now I rest easy on that car.  FYI---the Lincoln pintle caps were all brittle and the o rings seemed worn.  1989--200K miles.
Title: Re: cleaning injectors.
Post by: Bird351 on October 06, 2005, 09:42:56 PM
Decent how-to link, but I am a bit confused on how this guy means to power the injector in the test harness. Do injectors run on the main system voltage (12-14v) or are they stepped down to 5v?

I'm wondering if a spare PC power supply could be rigged up to function as the power source for such a test circuit. It supplies both 5v and 12v.
Title: Re: cleaning injectors.
Post by: TurboCoupe50 on October 06, 2005, 10:45:35 PM
Quote from: Bird351
Decent how-to link, but I am a bit confused on how this guy means to power the injector in the test harness. Do injectors run on the main system voltage (12-14v) or are they stepped down to 5v?

I'm wondering if a spare PC power supply could be rigged up to function as the power source for such a test circuit. It supplies both 5v and 12v.

They'll over heat if you throw a full 12v at them for long. I generally hit em with 8-9v from a adjustable power supply I have... BTW 5v isn't enough to operate them...
Title: Re: cleaning injectors.
Post by: CougarSE on October 07, 2005, 12:10:25 AM
Won't powering them for more than a couple of seconds burn them up?
Title: Re: cleaning injectors.
Post by: CougarCoupe88 on October 07, 2005, 01:07:23 AM
yeah i thought they run in spirts  only when the sertain cylinder needs fule
Title: Re: cleaning injectors.
Post by: Haystack on October 07, 2005, 02:45:30 AM
and how many times a minute do engines need fuel
Title: Re: cleaning injectors.
Post by: TCclone on October 07, 2005, 12:17:28 PM
use a 9v battery to open them.
Title: cleaning injectors.
Post by: jimfulco on November 25, 2005, 04:40:50 AM
Could you run some kind of solvent through them with a pump (or gravity) and cycle them with a momentary-contact switch?
Title: cleaning injectors.
Post by: Bird351 on November 25, 2005, 04:49:41 AM
This must be old-thread day on the forum. :p
Title: cleaning injectors.
Post by: 460 turbo truck on November 26, 2005, 01:32:00 AM
to be honest, i wouldn't think that it takes a voltage to run an injector, or if it did, it wouldn't be a full 12 volts,

while your car is running, back probe the injector, and find out how much voltage is running through it,

i think injectors are like a 90% duty cycle, there for, you can run them for a second or two,

why wouldn't you dissasemble the injector, like in the link, and use your wifes (or your own) ultrasonic cleaner, found on http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=3305

muahhaha...i'd never do such a thing...

or send them to your local carb shop, and have them do it..so you can blame them for screwing up,  not only that most of the shops will balance them too, and a flow test, making sure they are all flowing the same amount,
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