Just recently bought a 90 lx 5.0 with some modifications from previous owners. She has a k&n filter replacing the airbox, stock maf, 24lb blue ford injectors, bbk headers, h pipe and flowmasters. I went to replace the spark plugs which were 1 heat range colder from stock and they were very light with a timing mark very close to the thread base of the plug. I've had several people give me different opinions on what to do. 1-replace the maf to a 24lb cold air programmed unit. 2- install a fuel pressure regulator to pull down the fuel pressure to 30lb and install a wideband to get it close. 3- install factory 19lb injectors to correct the over fueling. The last thing I need to check is if this car has been chipped but I wanted to get some opinions from the community as well. Thoughts?
Maf or injectors?
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