Ok I got a problem with an FD that I just built. When I drove it after a rebuilt it drove fine but now with 100 miles it started to bog and die at 7lb. around 2600 rpm. Could this be a bad secondary injector, grounding problem, or something else?

 

Have you checked to see if you have any ECU codes?

 

I guess that is one thing to do first. Was wondering if somebody that has the same problem?

 

The bogging definitely matches the symptoms of a bad injector, but it's odd that it would run fine for a while first.

I would replace the plugs and look for evidence that one rotor is running a lot richer or leaner than the other. The plugs might solve the problem, and if not they are diagnostic.

Dave

 

I was thinking the same thing about the injectors but I thought the secondary comes on at around 3500 rpm? When apply the throttle lightly the rpm goes up to 8000rpm but on load it bogged around 7lb. boost everytime. So this couldn't be a grounding issue?