Hi everybody I am a newbee I trying to find the problem with my daughter in laws 1995 mustang base coupe. The car misses at about 1300 rpm when going up a hill. That is about 35 mph. If you run harder the miss goes away. It is just that rpm range with heavyer load on the engine. no vaccuum leaks. Maf replaced. Thanks for any help.

 

Those are lean codes. Basically the computer has adjusted as far as it can to the rich side. You have a vacuum leak dude.

 

obd2 read outs, fuel system 1-cl, fuel system 2-NA, Calc load-67%, ECT-172, STFT B1-13.3%, LIFT B1-25%, STFT B2-14.1%, LIFT B2-25%, Eng rpm-1240, ven speed -14 Anything out of the ordinary. I'm I still looking for a vaccuum leak?