injector cleaning
01-04-07, 06:52 PM
#1
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injector cleaning
Some1 said in the forum that you could clean injectors with carb cleaner and compressed air and pressing down on the injector niddle.. would this method work?
01-05-07, 11:15 AM
#4
Dont be ghetto.. Have them cleaned and calibrated by a PRO. It is not even exspensive. If you do not have an account with RC Enginerring, you can send them to me and I will have them serviced for you. Topfeeds are $25.00 per injectors, sidefeeds are $29.00 per injector.
Most of the time I have sets here already cleaned and can simply swap out for you..
Most of the time I have sets here already cleaned and can simply swap out for you..
01-05-07, 11:27 AM
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Depth is more dangerous!
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Low impedance injectors should never be hooked strait to the battery. If you car has a ressistor pack then you have low impedence injectors. You can test the injectors with an ohmmeter. 12-16Ω for high imp; 2.5-4Ω for low imp.
01-05-07, 12:28 PM
#7
Originally Posted by Trueblue707
Low impedance injectors should never be hooked strait to the battery. If you car has a ressistor pack then you have low impedence injectors. You can test the injectors with an ohmmeter. 12-16Ω for high imp; 2.5-4Ω for low imp.
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01-05-07, 12:43 PM
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Engine, Not Motor
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Low impedance injectors should never be hooked strait to the battery. If you car has a ressistor pack then you have low impedence injectors. You can test the injectors with an ohmmeter. 12-16Ω for high imp; 2.5-4Ω for low imp.
You can hook any ohmic load to a battery. The resistor pack is to match the resistors to the drive circuit on the ECU.
You can hook any ohmic load to a battery. The resistor pack is to match the resistors to the drive circuit on the ECU.
You CAN connect a low impedance injector directly to the battery for very short pulses without damage. However because a 3.5 Ohm resistor will draw 3.4A from a 12V source, you need to be careful not to hold the connection too long or you will burn up the injector (no cooling fuel flow).
To make it safe, you should put a low value power resistor (I use 10 Ohm 10W) in series to bring the current level down to a safe point.
01-05-07, 03:30 PM
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Check around locally. I found a reputable turbo & diesel shop near me that cleaned mine for $12 each, and I had them back the same day. I asked a machine shop where to get it done, and they referred me there.
01-05-07, 06:52 PM
#12
Originally Posted by Aaron Cake
Both these statements are true.
You CAN connect a low impedance injector directly to the battery for very short pulses without damage. However because a 3.5 Ohm resistor will draw 3.4A from a 12V source, you need to be careful not to hold the connection too long or you will burn up the injector (no cooling fuel flow).
To make it safe, you should put a low value power resistor (I use 10 Ohm 10W) in series to bring the current level down to a safe point.
You CAN connect a low impedance injector directly to the battery for very short pulses without damage. However because a 3.5 Ohm resistor will draw 3.4A from a 12V source, you need to be careful not to hold the connection too long or you will burn up the injector (no cooling fuel flow).
To make it safe, you should put a low value power resistor (I use 10 Ohm 10W) in series to bring the current level down to a safe point.
Also, may I add, that if you drive an injector static (with an EMS of course) it has the same effect and will STILL burn out the injector.
So my original statement is 100% true. I can hook an injector up to a 12 V battery DIRECTLY, as long as I dont take it too far out of its operating specifications....
Last edited by J-Rat; 01-05-07 at 06:58 PM.
01-06-07, 07:01 AM
#15
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Originally Posted by rx7vadim
where do u buy high pressure carb cleaner./?
I suspect he means carb cleaner under high pressure.
I've posted about this before, somewhere, but a successful method I used involved a piece of fuel line, a basketball, and a basketball inflation needle. It's truly ghetto, but effective.
Get about an 18" length of fuel line that fits tightly over the injector inlet. Fill the tube with carb cleaner. Put the other end of the tube over the BIG end of the inflation needle, and poke the needle into the b-ball. That gives you about 10 psi of pressure--that's not high pressure, but it should be enough. Once you've got that set up, pulse the injector from the battery, and look for an even spray pattern. Be careful of where the cleaner goes because you're dealing with sparks and flammible liquids.
