5280tunage
Full Access Members
Hey all, hoping some folks can come up with some good ideas here. Over the last 2 months or so, this issue has crept up virtually every time I fill up. It ONLY happens when I fill up and it happens within one or two minutes after filling up, and within less than a mile of driving. So for those of you that may not know my mods, I have SPD turbo adapters, SPD downpipes, full custom exhaust, O2 spacers for the cats (I did not do the cat delete), CAI, Mishimoto intercooler, Plugs with less than 10K on them (the Ruthinium plugs, properly gapped), and a 5star 91 tune to match the upgrades.
So this has happened probably 80% of the time over the last 2 months or so, whenever I fill up, as I'm leaving the gas station, after light acceleration and letting off the throttle, I get a backfire. It literally feels/sounds like I drove over a plastic bottle each time and I can lightly feel it in the chassis. I'm running the exact same setup, exact same tune, that I've had for 2 years. Nothing else has changed. The only thing I can think of is that about 3 months or so ago, I ran a can of SeaFoam through the fuel system, but that's it. I don't like this and I'm concerned it may damage something major over time, any thoughts on what I could/should do, or what might be causing this. Again, I can't stress this enough, I can drive 200 miles with no issues, but if I fill up, and drive away, there's a good chance I will get a backfire, and only one, never more than one.
thanks in advance, oh, and absolutely no CEL's or warnings from the vehicle at all. No loss of power, no stuttering, just a crazy loud backfire.
And I did find this thread, but there really never was a resolution or outcome. https://www.expeditionforum.com/threads/engine-backfire.51994/
So this has happened probably 80% of the time over the last 2 months or so, whenever I fill up, as I'm leaving the gas station, after light acceleration and letting off the throttle, I get a backfire. It literally feels/sounds like I drove over a plastic bottle each time and I can lightly feel it in the chassis. I'm running the exact same setup, exact same tune, that I've had for 2 years. Nothing else has changed. The only thing I can think of is that about 3 months or so ago, I ran a can of SeaFoam through the fuel system, but that's it. I don't like this and I'm concerned it may damage something major over time, any thoughts on what I could/should do, or what might be causing this. Again, I can't stress this enough, I can drive 200 miles with no issues, but if I fill up, and drive away, there's a good chance I will get a backfire, and only one, never more than one.
thanks in advance, oh, and absolutely no CEL's or warnings from the vehicle at all. No loss of power, no stuttering, just a crazy loud backfire.
And I did find this thread, but there really never was a resolution or outcome. https://www.expeditionforum.com/threads/engine-backfire.51994/