Question about 1999 Chevrolet Tahoe
I have the trouble code p1416 on my 1999 Chevy 5.7L 350 which is the secondary air injection system, (bank 2) (valt 2) from multiple diagnosis machines. I have replaced both of the check valves, which were both bad. I then went threw the entire system and cleaned all tubes involved metal and rubber and all parts involved in the system are in proper working function yet even after doing a reset on the cars system the code still comes on. The only part I am not sure about is the pump. Whenever I turn the vehicle on it turns on and sucks air in and pumps it through the system then its stops pumping after about a minute or two. Is that how the pump is supposed to run or should it always be pumping when the vehicle is running? If that is how it is supposed to run then what else could my problem be? Could it possibly be an O2 sensor or a fuel injection issue? Any thing that anyone could tell me would be very much appreciated, thank you.
It runs only when the engine is below a present coolant temperature, it never runs after that. The purpose is to burn off excess hydrocarbons.
Posted on Apr 21, 2013
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Posted on Jan 02, 2017
before you drop tank again, check fuses & relay.then disconnect fuel line @ filter turn key to on position should hear fuel pump run and get gas stream out of line. if no flow from line new pump faulty be sure & remove negative battery cable first good luck.
Posted on Jun 20, 2009
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.
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). parts4chevys.com has it listed as a check valve. $128 list. Good luck and hope this helps
Posted on Apr 08, 2009
SOURCE: 2001 chevy blazer won't start
have you tried cleaning your fuel injectors? There is a cleaner that you put into the vaccum line that comes from the brake booster to the intake (so it feeds all the injectors all at once) it is called SeaFoam it runs about $8.50 a can. The directions are on the can.
Posted on Dec 11, 2008
Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.
Posted on Jan 03, 2009
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