Results 1 to 4 of 4

Thread: spark blow out, to rich??? scan provided br7ef at .025 gap HELP ME!!

  1. #1

    spark blow out, to rich??? scan provided br7ef at .025 gap HELP ME!!

    once again.hpl


    I'm about to loose it. I recently added a second pump, installed fuel rails, increased fuel line size to -8 feed and -6 return. 2 new relays. The problem started after I did this. Not sure if its related or not. checked all hoses for leaks and feel pretty good about all the connections.

    From the log you will see when I get into boost about 10 lbs, my engine starts cutting out bad. It almost seems like spark blow out. I recently changed to the br7ef plug and gapped them to .025. Is this to much?

    My afr error shows about 5% to rich, 11.44 commanded. Its hard to get a accurate error because the engine cuts out at such a fast pace.

    My timing is 10 degrees advance when this happens. 91 octane

    Truck runs and drives.

  2. #2
    Tuner in Training
    Join Date
    Sep 2018
    Location
    danville indiana
    Posts
    16
    having a similar issue, did you ever solve it cause this is whooping my ass too.

  3. #3
    Quote Originally Posted by kylefentz View Post
    having a similar issue, did you ever solve it cause this is whooping my ass too.
    I had this happen to me once at the track. turned out to be speed limiter in the pcm. i was running br7's and had them gapped around .026. thought it was spark blow out as i was hearing a backfire even though the fueling was good. ended up being the speed limiter even though i had a th400.

  4. #4
    Tuner in Training
    Join Date
    May 2019
    Posts
    29
    I just made a similar post also. Hope someone can look through my tune and see something I don't.