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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
So i pulled a code 33 today, "egr closed/erratic insufficient flow". What are the causes of this? If it helps my car idles kind of high but other than that it runs great.
Code 33 = EGR valve detected not opening. A problem in the vacuum line from the EVR solenoid, or a problem with the vacuum supply line to the EVR solenoid will cause the EGR not to open as well. it will only cause the EEC to delete the EGR function and no driveability problems. Since the idle is a little high, look for the possibility of a vacuum leak that could also be affecting its operation. LUK
Ive got that code and I just ignored it. Figured since the egr wasnt opening and since there is no CEL I just deleted it and bypassed my coolant lines.