i have an 86 f-150 with a 5.0 f.i. motor w/auto trans. i have no vacuum to the egr valve causing it to fail a cal. smog test. i have replaced the module that controls the vacuum to the egr valve but still no vacuum. i have checked for voltage to the new module and it is supplied with more than 10.5 volts (about 12v).the module also has plenty of vacuum being supplied to it. any ideas as to what the problem might be, or where do i go from here? it has to pass a smog test in order to register the truck in my name (i just bought it). thanks in advance.
- posted
19 years ago