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I have a 1990 lx 5.0 and having some problems. First off when I Go to start my stang the fuel fressure goes to about 7 pounds. It wont start, but when it does start it goes to about 36 pounds. So heres my question,when you first turn the key forward to turn on the ignition should the fuel pressure be above 30 or so pounds? Also my car drove down the street with the mas unpluged?? Its has me al messed up right now. It drives but has realy bad performance above 3000 rpm.please help
 

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Just played with my fuel pressure last week, I remember the pressure not being very high during the priming....ur 36 lbs running is OK tho it should be at least 38 or so...when you say mas..do you mean maf??? If ur car is running crappy...thats probably the problem...plug it in and let the computer adjust.
 
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