I have a 99 blazer 4.3 4x4 getting a trouble code for secondary air inj. how do Itrouble shoot it ? please help.

 

Post the DTC's in the order they were retrieved.

 

P0410?

Best to rip the system out and have the code deleted from the PCM.

Oops, I didn't type that out loud, did I?

 

AJBert, I like the sound of that . How to do that please? chuck s

someone responded remove codes from vcm . possible?

changed coil,mod, cap/rotor getting power on both pins at coil with key on. is this correct. no flash when cranking . whats next

codes come up p04101/2 -2/2

 

This thread will walk you right through the diagnosis: https://blazerforum.com/forum/diagnostic-trouble-codes-dtcs-49/p0410-explained-35146/

 

Please keep things in ONE thread. Do not spread things around.

You need to diagnose, then repair the issue. Clearing the codes will not fix anything.

What you have posted really doesn't correlate to a specific DTC... Is it P0410? Or something else? A DTC starts with a letter followed by four numbers.

 

Had the same problem-intermittent P0410 codes. Pump works. Finally pulled everything apart and found the solenoid/valve that keeps the exhaust from backing up into the pump had a tear in the rubber diaphram. Anyone know where I can get a replacement? Is this a dealer-only item or do they want to sell you a whole new pump assembly. FLAPS doesn't carry it.

 

The AIR system check valves are available at a number of different stores. The OE# is 12558992; AC Delco 214638, Airtex 1A3057, Duralast E254, etc.