Having an issue with the engine not reving up. Starts and idles fine but when you get on the throttle it seems like its cutting in and out. I ran it with a spark tester installed and it looks like the spark stops and starts but only when you rev it up. All this seemed to take place after sucking in a piece of 1/4 inch nylon rope. Managed to pull it all out. Any way this is connected to my problem? Looked through lots of threads before posting this.