1994 F-150 Driver

BUMP! I've been looking all over and couldn't find anything super useful. So i'm reviving this thread. For those of you who have done the smog pump delete, have you noticed a millage improvement?

90customf150

Stang delete pulley works fine.

1994 F-150 Driver

Have you noticed any gain in millage or performance with the delete?

Just call me Sean

iTrader: (1)

The smog pump has very little drag. You're not going to see any horsepower or mileage gains.

1994 F-150 Driver

Thanks Sean

th25

What about the ac sean?

90customf150

I only put a delete pulley on cause my smog pump seized up. Couldn't tell you either way. I added a lot more with it

Just call me Sean

iTrader: (1)

The a/c is an idler when not engaged so no gains there either.

Warlockk

Sean is right on the money as usual. The AIR pump doesn't recirculate exhaust gas. It does what it says. It pumps fresh air to the cat to provide oxygen ( which is generally burned up in your engine) needed to convert polutants. It has less drag than your cooling fan and about as much as the alternator. Just try spinning it by hand. The EGR recirculates exhaust gas to reduce combustion temperature and increase flow. Removing it can cause a bunch of trouble. As for the A/C , when not in operation , it is just an idler pulley until the magnetic clutch is activated. Again just try spinning it. If someone found 20 HP from deleting these pulleys I've got some swamp land to sell.