My husband got an 01 s10 4.3 automatic. The check engine light is on and we took it to auto zone, and they said it‘s the secondary air injection system fault. Does anyone know what this could be? Probable causes could be circuit relay or fuse open, check connection and wiring or air pump defective or hose blocked. They did one of those check engine scans. My husband has already changed the air filter and a pcv vowel, but it keeps coming back on. We have to have it MD inspected within 30 days before the tags expire and my husband is leaving for the military in less than two weeks.
1) your check engine light will NOT! cause you to fail Maryland state inspection, (only your emissions test) If your close to glen burnie go to Country club auto 7448 east furnace branch rd glenburnie md 21060- #410-768-0414 they do maryland inspections there. 2) more than likely your secondary air pump is not work beacuse (a) blown fuse/relay (b) pump (c) tube/check valve going to or coming out of pump.
Nice trucks good reliability. but not fast, but the 4.3l V6 is WAY better than the 4cyl, wouldn't recommend the 4cyl at all just not enough power.
Putting a KN on is what is damaging your motor. Don't believe me? go Google KN and silicates Some good reading there! your motor is already toast. Worst thing you could do to a truck that gets driven in the desert.
Pressure washing your engine IS SAFE as long as you know where to avoid spraying. You most likely got water into the distributor. Open up the dstributor cap and check for moisture. If you have an air compressor or some form of compressed air, blow the moisture out. Let it sit open for a few hours to dry.
cle's advice is WRONG. The state inspectors will immediately determine that a trouble code is stored in the computer and they will fail your inspection. The secondary air injection system is a series of hoses and an air pump. It blows outside air into the exhaust manifold to help complete combustion of the exhaust before it reaches the catalytic converter. There's a mess of issues with this system from something as minor as a blown fuse to water that's gotten inside the pump and corroded it. This really isn't a do it yourself repair, unless you want to start throwing parts at the problem. I know money is tight, but you really will be money ahead if you find a good shop that has knowledge about this particular problem. Call around and ask them specifically if they've worked on the S-10 secondary air injection system. Also ask them if they are familiar with the 2 GM Technical Service Bulletins on this issue. If they are, tell them your husband is in the service and ask if they offer a service discount.
