Wally
Wally GRM+ Memberand SuperDork
8/17/10 8:16 p.m.

This weeks problem with my brother's focus is a bad airpump according to the dealer. He can't afford their price so we were going to do it ourselves. Problem is we can't find it anywhere and it's not on the front of the engine the way God intended. ANyone know what and where I should be looking?

Thanks

VanillaSky
VanillaSky HalfDork
8/17/10 8:28 p.m.

Wait, a smog pump?

Wally
Wally GRM+ Memberand SuperDork
8/18/10 2:16 a.m.

I'm assuming so, but I can't seem to find anything about it online

digdug18
digdug18 HalfDork
8/18/10 2:25 a.m.

have you checked over at focusfanatics.com?

VanillaSky
VanillaSky HalfDork
8/18/10 3:02 a.m.

http://www.autopartswarehouse.com/details/QQFordQQFocusQQMotorcraftQQAir_PumpQQ20032005QQMICX1924.html

For an earlier Focus.

Potentially old info from focusfanatics.com via google: "Secondary air systems typically utilize an electric air pump as well as one or two electrically controlled check valves to deliver air into the exhaust manifold.

The only vehicle which uses secondary air is the 2.3L PZEV Focus. The Focus uses a system with ported air. This means that airflow is delivered to each individual exhaust port. The secondary air pump is energized soon after start-up while the fuel system is in open loop and icing conditions are not likely. After the O2 sensors warm up, the secondary air pump continues to be energized while the fuel system goes into closed loop fuel. The secondary air system continues to run in closed loop fuel until the air pump is de-energized. The typical time period in which the AIR pump is energized is approximately 12 seconds.

The AIR pump flow check monitors the HO2S signal at idle to determine if secondary air is being delivered into the exhaust system. The air/fuel ratio is commanded open-loop rich, the AIR pump is turned on and the time required for the HO2S signal to go lean is monitored. If the HO2S signal does not go lean within the allowable time limit, a low/no flow malfunction is indicated. (P0411)

The electric air pump draws high current and must be energized through a separate relay. Both the primary and secondary circuits are checked for opens and shorts. First, the output driver within the PCM (primary circuit) is checked for circuit continuity (P0412). This circuit energizes the relay and the vacuum-operated check and control valve(s). Next, a feedback circuit from the secondary side of the relay to the PCM is used to check secondary circuit continuity (P2257, P2258)."

wrc_fan
wrc_fan New Reader
8/18/10 8:17 a.m.

On the '03-'04 pzevs its located in front of the passenger tire, up by the A/C drier. There's a long plastic tube that runs across the front of the engine bay, and then back to the exhaust mani.

At least those are the parts I took off my autox car

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