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I’ve replaced the secondary air injection pump valve and solonoid. Noisy pump rough idle and rough acceleration. Noise is coming from the pump I replaced all three. I’m still having the same issues noise from pump. The pump is supposed to turn off after heating up of catalytic converter and turn off. When it’s running rough I can disconnect the hose connecting solonoid to secondary injection valce and it runs smooth for a little while but goes back to running rough. Please help I don’t know what else to do
How long has your 2001 Buick LeSabre had this problem?
More than a week
1 Reply
Hello, I’m Pete from the Car Genius team at RepairPal. I’m sorry you’re dealing with this concern on your Lesabre. Based on the information provided the first thing I recommend having tested is to see if you have high exhaust back pressure. If the catalytic converter is starting to plug up this will cause a noisy pump, poor running, and excess pressure for the secondary air injection system. The back pressure for your exhaust system should never exceed 1.5 psi at any RPM. If it does then I would suspect that the catalytic converter assembly is restricted and needs to be replaced. I also recommend checking for exhaust valves for the secondary air injection system. The valve(s) should be one way valves and if when you remove the hose from one if exhaust flows back up through them then the affected valve(s) should be replaced. If you’d like to find a trusted, certified repair shop in your area, you can check here: https://repairpal.com/certified. If you need more advice, or have any further questions about your vehicle, we’re here to help. Just give us a call at 877-913-1554 where we will be happy to assist!