generallee440

i got a 91 mustang gt and it will idle for about 10 min then start sure idle and then die and wont start back up i put two new o2 sensers cleaned the maf and icv and a new air temp senser it as o/r x pipe flowmasters 65 mm throttle body cold air in take e303 cam 5 speed it has no a/c or smog pump and the egr is there but it is not hooked up thanks

mjr46

when it won't start back up, check for fuel or spark, or lack there of

MustangBradley

At this point I would pull codes and see what the computer says. You say the EGR is there but not hooked up. Do you mean that it is unplugged from the harness or the tubes that lead to the head are not attached or both? Since it runs for 10 minutes then dies, it may be dying as it enters into open loop operation since it is warm then.