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I installed an AEM adjustable FPR and set the fuel pressure to the same level as the stock FPR. I did have to adjust the CL maf scaling by a few percentages to get it below 1% for all ranges.
My wideband AFR readings were spot on for the OL fueling targets.
In my case the issue came up about two weeks after being tuned with a walbro fp , DW 850 injectors and meth injection. I initially suspected the new injectors and changing back to the stock injectors and map didn't fix the issue.
Thanks welaish for your thread. Changing the FPR also sorted...
Thanks. I'll also replace it and see if it sorts it out.
In my case the issue came up about two weeks after being tuned with a walbro fp , DW 850 injectors and meth injection. I initially suspected the new injectors and changing back to the stock injectors and map didn't fix the issue.
Hi. I've been chasing the same issue on on my car ( 2011 WRX STI) that just started out of the blue for the last 5 weeks. Were you able to find a solution ?
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