3Macks Posted October 11, 2015 Share Posted October 11, 2015 08 MP8 7nnt injector carbons up and won't regenerate any way to prevent this Quote Link to comment https://www.bigmacktrucks.com/topic/42162-7nth-injector/ Share on other sites More sharing options...
wheeler73 Posted October 12, 2015 Share Posted October 12, 2015 If it does not have 2 lines to the top of it, it needs an air purge kit installed. If it does have 2 lines the air purge may not be working correctly. Quote Link to comment https://www.bigmacktrucks.com/topic/42162-7nth-injector/#findComment-307171 Share on other sites More sharing options...
turckster Posted October 14, 2015 Share Posted October 14, 2015 When I clean a 7th injector I use Berrymans B12 cleaner (spray) and a soft bristle brush to clean the injector. Then I flow clean the 7th injector using a bottle w/#4 strataflex line with an air charge port(a/c system cleaner bottles). I fill the bottle about a 1/4 with Berrymans B12 cleaner, pressure the bottle, use Pro Tech Tool to activate the 7th injector and watch the spray pattern. Reset the 7th injector adaptive factor so the eecu knows it has been cleaned, that way it will have proper delivery when performing a regen. If it has an air purge system then make sure it is working or that would cause the 7th injector to soot over quicker than usual. It should have some air pressure with the key on. If not, the air regulator and on/off solenoid is usually located at the air dryer. Voltage is supplied to the solenoid by the air dryer purge heater - there is a jumper harness that connects to the purge valve heater and runs over to the solenoid valve. Quote Link to comment https://www.bigmacktrucks.com/topic/42162-7nth-injector/#findComment-307423 Share on other sites More sharing options...
Popular Post terry Posted October 14, 2015 Popular Post Share Posted October 14, 2015 When I clean a 7th injector I use Berrymans B12 cleaner (spray) and a soft bristle brush to clean the injector. Then I flow clean the 7th injector using a bottle w/#4 strataflex line with an air charge port(a/c system cleaner bottles). I fill the bottle about a 1/4 with Berrymans B12 cleaner, pressure the bottle, use Pro Tech Tool to activate the 7th injector and watch the spray pattern. Reset the 7th injector adaptive factor so the eecu knows it has been cleaned, that way it will have proper delivery when performing a regen. If it has an air purge system then make sure it is working or that would cause the 7th injector to soot over quicker than usual. It should have some air pressure with the key on. If not, the air regulator and on/off solenoid is usually located at the air dryer. Voltage is supplied to the solenoid by the air dryer purge heater - there is a jumper harness that connects to the purge valve heater and runs over to the solenoid valve.Makes the old mechanical engines look better and better! 3 Quote Link to comment https://www.bigmacktrucks.com/topic/42162-7nth-injector/#findComment-307451 Share on other sites More sharing options...
3Macks Posted October 14, 2015 Author Share Posted October 14, 2015 Does not have air purge kit will have to try it Quote Link to comment https://www.bigmacktrucks.com/topic/42162-7nth-injector/#findComment-307468 Share on other sites More sharing options...
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