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=&showtopic=136942&view=findpost&p=1514533
Anyone else?
With 35 year old injector's, assume the worst and hope for the best.
I agree with other's recommendations on WitchHunter...
Carb cleaner, US bath and new filters and they should be like new, except for corrosion damage.
U.S. = ultrasound. Thanks.
I replaced the others 'cause I thought leak-down meant they were irreparable. This injector won't spray so maybe it can be "cleaned."
I'd prefer not to wait a week by sending it out or buying new. I also don't want to spend $ I don't have to, so I'm interested in trying reharvey's procedure. He doesn't describe what he does it in the post, but I'm guessing you open the injector with a little juice and then spray the heck out of it.
Searching this topic, you come across the issue of internal screens. Can anyone describe how to access those, and where to source them? Sounds unlikely to me.
What's up with having your local "diesel shop" clean the injector, as referenced in related threads? Is there a better term for these 'cause I'm not clear on what they are? Garage, machine shop, other? Should I just look for a building with lots of Macs and Freightliners in the parking lot?
Wow--someone found that comment I made about cleaning my own injectors. Like I said it's not for everyone to try because all kind of bad things can go wrong. Go buy rebuilt ones.
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.
Well I mined back to that last page of search results. Here's what airsix did: http://www.914world.com/bbs2/index.php?s=&showtopic=1448&view=findpost&p=18798
Powered by Invision Power Board (http://www.invisionboard.com)
© Invision Power Services (http://www.invisionpower.com)