Will Smog Delete cause EFI Problems?

[lucheski]

If my air pump is gone, can I get into closed loop?
Without Airpump will it messup the fuel calibration or the calibration of the O2 Sensors?

[jimberg]

Yes.
No.


The important question is how you plan to go about it. Are you deleting your catalytic converters, too? If not, the lack of air being pumped to your cats will lead to clogged cats.

[lucheski]

Im already running an off-road H-pipe with no cats
heres the rest of my combo though:

1989 Grand Marquis 302 Block
Bored .030 over
Sterling Hypereutectic Pistons
Federal-Mogul Chromemoly Rings
Edelbrock Performer RPM "Typhoon" Intake (Ported)
1969 351W Heads (30 hours of hand porting)
60cc combustion chambers machined to 50cc
~11:1 Compression Ratio
Ford Racing F-303 Cam
Sealed Power Hardened Pushrods
Sealed Power Valve Springs
TRW Guideplates
Clevite Studs (For Roller Rockers)
Cloyes Double-Roller Timing Chain
Harland Sharp 1.6 Ratio Roller Rockers
A9L Mass Air Computer
70MM Cobra Mass Air Flow Sensor
Chromed Cold Air Intake Kit
Ford Racing 24lb/hr Fuel Injectors
MAC Equal Length Headers
MAC Offroad H-Pipe with Flowmaster Mufflers

OTHER STUFF

Weld Racing Wheels
Milodon Chrome Valve Covers
3.55 Posi Rearend
3" Cowl Hood
New Dual Friction Racing Clutch
New Resurfaced Flywhee

[jimberg]

There's no reason to keep the pump if you're running with no cats.

[Stang_ROTY]

That's a great point Jim...how ya been!!??

I've ran no cats/no smog pump and had no problems with regards to check engine lights. Stumbling idle, irratic part throttle response, etc. were my problems before I got my chip.

Good luck

Originally posted by jimberg
There's no reason to keep the pump if you're running with no cats.

[rdy2rn2]

removing the airpump will not affect the loop status but will affect emmissions. it will cause high co and nox readings. all that the pump does is force clean air into the exhaust lowering the readings.

[jimberg]

It pumps air into the cats so that there is oxygen available for converting HCs to H2O and CO into CO2.

[lxfiveoh]

Originally posted by jimberg
It pumps air into the cats so that there is oxygen available for converting HCs to H2O and CO into CO2.

Really....if it were as easy as just pumping fresh air into the exhaust to "dilute" the pollutants, we wouldn't even need cats, just really big air pumps.

[rdy2rn2]

basically, but the cats clean the air and the airpump is simply a secondary or helper. it couldn't do it alone.

[lxfiveoh]

Never mind...