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98 z28 air pump relay code comes up, replaced relay fuse, still blows fuse and chck eng lite still on

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You need to have it hooked up to a computer and checked. and the brain needs reset. then the check engine light will go off. as for the air relay thats probably a naked ground wire touching somewhere in the motor. you need to find it and check. if not your air pump and breather needs to be changed.

Posted on Oct 29, 2009


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How do I fix - P0411 Secondary Air Injection System Incorrect Flow Detected on 98 v6 mustang

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Code 410

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Where is the fuel pump reset switch on my 98 dodge ram 1500 sport?

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My car is losing power, and the fuel pump wont come on. it wont turn over. i replaced the ignition lock. what else could it be besides the alternator or my starter?

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2004 trailblazer,with po410 code.replaced purge valve , gas cap , vent valve on gas tank . can here air pump come on start up , but seems to have a higher pitch than before problem with code started . I...

p0410 secondary air injection valve malfunction..
Just know that diagnosing this is time consuming since the "system" is only active for a few seconds on cold start.

for now:
1.) wait for your car to be "cold" or 4 hours. Disconnect the hose from check valve (located passenger side--the transmission dip stick is attached to the bolts that hold it to the block). Start the truck, you should hear a nasty sound for about 30 seconds to a minute. If you don't its your check valve.
1a.) If it is your check valve, you can try to clean it. Get some throttle body cleaner, remove the check valve spray thouroughly (I did it a couple of times to get all the carbon and rust out) and let dry reinstall and follow above instructions. If no go replace check valve

2.) wait for your car to be "cold" or 4 hours. remove the fattest hose from the underside of air intake hose (I think thats where it is, I have a CAI so Its hard to know where it is exactly OEM) and from the check valve. Have someone else start the truck. Feel the hoses, you should feel sucking and blowing (I can't remember which is supposed to blow / ****) If you don't feel anything then its the pump (maybe -- read further)
2a.) check fuses there are about 3 in the manual listed for air pump (if bad fuse replace and retest, make sure to check the fuses after to make sure that the pump isnt blowing fuses) 
2b.) Locate the air pump its driver side mid car just behind the cross member for the frame. There are two wiring harnesess one that goes into the relay (grey box) and one that has two fat wires (thats the power plug for the pump.) disconnect that one, wait for cold start and start truck while having a multimeter attached set on DC mode. If you get a reading of 0 then replace the relay. if you get power 12-15 volts replace the motor. 
3.) If both the check valve and the pump are testing out ok it could be a clogged hose.

There are only 3 parts to this system, Check Valve ($125), Air Pump ($280) and Relay ($50). has it listed as a check valve. $128 list. Good luck and hope this helps

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1 Answer

99 toyota check on code po300,po303,po305,po171,p0420

Hey Dan, It cannot hurt to change the Plugs and wires. Make sure and Check all the Fuses and Relays also. Sometimes the Realays can blow or just get old and send a Code also.

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