Well my car keeps going into limp mode (5 psi) and every once in a while throws a CEL. It seems to happen when going at high speeds. i cna be on it all i want at lower speds and its fine, but once i spend any significant amount of time over lke 80 ish being on adn off the throttle, it goes into limp. i took it into 2bennett and it hs a running lean code (p0171 i believe) but they ant pinpoint it. we replaced the MAF but still no luck. help please??

 

P0171 = system too lean bank 1 possible problems are intake/exhaust leak, AIR system, MAF which you have already done, fuel pressure/pump, injector(s), HO2S (heated o2 sensor),

im for an air leak on the intake

 

thanks. but also forgot to mention that while it was there, they did a intake leak test. Ill be sure to give them that list next time i get it in.