Boosted 5.0 running lean. Any advice?

[Grantmotter1]

2017 mustang gt
Paxton 2200
FIC1000
Fore double pump with fc2

Had a fuel pump fall out of hat recently, car was running bad. Put pump back in with new o-rings etc and car was running better but was going lean at 5500. Got two new brand new 295 pumps and put in and car was still running lean at 5500. Figured maybe the injector/fuel filter was dirty so I cleaned fuel filter first and then cars AFR was perfect to 8k. Got injectors cleaned next day and reinstalled and car went back to running lean at 5500. Anymore had a problem like this, or any advice. Thanks a lot I appreciate it.

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[Whitedevil95]

Double check all your vacuum lines and the line to the FPR to see if its getting a clean boost signal. Typically you get more FPR with boost. Just a thought.

 

[horsepower addiction]

You have to be careful where you get those pumps. A lot of fakes out there

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