 Fuel Injector DIY, anyone...? |
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| Prospectfarms |
 Mar 17 2012, 10:32 PM
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#1
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Member  Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest  |
A few months ago I replaced 2 leaky injectors with new from Now one of the remaining originals has stopped delivering fuel. I assume it's clogged. I don't want to buy another one if I can clear this one. Anyone done it at home? redharvey uses a 3 volt transformer and carb cleaner: http://www.914world.com/bbs2/index.php?s=&...t&p=1514533
Anyone else? |
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| SLITS |
Mar 18 2012, 07:24 AM
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
If it's not spraying, it could be a bad / dead solenoid. It should "click" when power is applied. They also will have a resistance across the terminals of 2.5 ohms.
The machine that does them holds them open (powered) and a cleaning solution is run through them. A leak down test along with a flow test is performed. Leak down is applying a known pressure to see if the injector leaks at all (not powered) under pressure. If it leaks around the plastic to metal barrel interface, it is tossed. If it leaks through the pintel, you can try cleaning it again. A flow test (cc/min) is then performed to see if it is close to the manufacturers' specification. I once set up a fuel rail ( two injectors). Used a common pump (single in, single out) with a container of cleaning fluid, and a stock pressure regulator. All cleaning fluid was returned to the container. I set 30 lbs pressure and then triggered the injectors and let the cleaning solution run through them for 8 hours. I could also watch the spray pattern of the injectors. The only thing I couldn't do was change the micro-screen in the inlet of the injectors (didn't have a supply of them. it would also be nice to be able to run the cleaning fluid in the opposite direction .. backflushing as it were. |
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| Prospectfarms |
Mar 18 2012, 07:30 AM
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#3
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Member Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest |
QUOTE(SLITS @ Mar 18 2012, 09:24 AM)  If it's not spraying, it could be a bad / dead solenoid. It should "click" when power is applied. They also will have a resistance across the terminals of 2.5 ohms.... it would also be nice to be able to run the cleaning fluid in the opposite direction .. backflushing as it were. TX Slits, for the solenoid resistance specs and good description of your cleaning set-up. I agree about back-flushing. Maybe reharvey sprays both ends? |
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Posts in this topic
Prospectfarms Fuel Injector DIY Mar 17 2012, 10:32 PM
wingnut86 With 35 year old injector's, assume the worst ... Mar 17 2012, 10:42 PM Valy Carb cleaner, US bath and new filters and they sho... Mar 18 2012, 12:10 AM Prospectfarms U.S. = ultrasound. Thanks.
I replaced the others... Mar 18 2012, 07:02 AM reharvey Wow--someone found that comment I made about clean... Mar 18 2012, 07:18 AM
Prospectfarms
No thanks, I'm comfortable with explosions. ... Mar 18 2012, 07:25 AM
Prospectfarms Well I mined back to that last page of search resu... Mar 18 2012, 08:09 AM |
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