275 RV injector problem

[GRudy]

I just installed a used set of Bosch 275 RV injectors last monday. With my Lance camper on it seems to miss at about 1800 - 2000 rpm on a hard pull. It also seems not to have the bottom end power that it had with the stock injectors. Running empty I used to be able to run 4th gear down to 800-1000 rpm (level road) and pull it out with no problem. Now anything below 1200 rpm it wants to lug like its going to stall and I have to grab 3rd. I have a PS boost module and elbow on the way. Will this help? I can hit 1200 degrees egt in a hurry. Am I not getting enough air at low rpm to burn the extra fuel? Could the used set of injectors be dirty? I do run Stanadyne performance formula every tankful. Will this clean the injectors? I have been reading the post about mid range bucking, missing problems others are haveing but since this just started imediatly after installing the injectors I tend to blame my problem on them. Any ideas?

 

[Wiredawg]

George 00:



Make sure you torqued them properly. My number 4 and number 6 were not tight and I lost power. I got a crow foot wrench and put on my 3/8" torque wrench. After all were properly torqued, eveything worked fine. Torque info is out in my truck, let me know if you need info.



Wiredawg

 

[juicedcummins]

You may not need the boost fooler if youre van-aken is the newer one because it already has a map plug on it. AS far as boost you need aprox 30lbs with that set up to cool egt's[give or take a few pounds but don't over do it just take what you need]. Boost elbow good idea[required]. 800-1000rpm is lugging it try 1500 min.

 

[GRudy]

Well that could be a problem. I bought a set of metric crows foot wrenches on ebay just for this project. After I had the injectors in I went to torque them and realized that the 19mm crows foot was actually about 18. 5mm. The guy I bought them from is replacing them but that don't help me a whole lot now. I just tightend them with a open end wrench. The specs call for 28 ft. lbs. I didn't want to over torque them. Maybe I'll have to go back and hit them again now that I have put a couple hundred miles on the engine. Thanks.