kthiemann

I've done a search and have seen a lot of varying opinions but am curious to see if anyone has tried this stuff on a ISB. The city bus system I work for has us using cummins fuel injector cleaner on our big buses that run ISM's during a major service. This is not a fuel additive but some stuff that you run the engine off of straight from the can after isolating the engine from the fuel tank. About the only improvement I really see is that the injectors are easier to adjust when you run the valve's but is hard to tell on one of these beasts and have been wondering if it might accidentally be of any benefit to run thru a 12 valve.

I do know that you cannot use the stuff on a 24 valve.....they tried it on one of our ISC's and it fried the injection pump about halfway thru the can....seems that the cleaner has no lubricity and the electronic pump we use didn't like that at all.........glad that was my day off......I understand that the head honchos were just a tad upset over that one......

nhboyd

I use it on the bigger engines. If you done and adjust injectors they will hang up and you won't get the adjustment right.