I recently discovered the smog pump on my '91 5.0 is bad. the motor was idling crazy which lead me to replacing the IAC valve and adjusting the TPS. after these replacements/adjustments the idle was still acting up so i pulled off the hose leading from the smog pump to the EGR valve hook up and it idled just [email protected]
RPM. I was driving home on the highway today in 5th gear driving close to the posted speed limit and the car surged like it wanted to shut off. about ten minutes later the car actually did shut off, so i pulled to the shoulder let the car sit for a min and it fired right up. driving thru the streets i could hear what sounded like an exhaust leak(louder then usual since the smog pump line at that time was unhooked).
once i parked it i got under the hood and found that the sound was coming from the EGR valve opening, i plugged it with my finger, the sound went away but still heard the exhaust leak.....My question is would leaving the smog pump hose unhooked and both ends not plugged cause the air/fuel ratio to be off thus shutting the car off?
I dont have the $$ to replace the pump so i'm considering blocking both ends off until I can do so...