I don't know about Advance. I buy oil and fluids there sometimes and recycle my old oil there, but usually don't buy parts there.

For RockAuto, here's the prices I found:

AC-Delco parts:

• 9746KK, $42.79, with discount, $40.65
• D465, $7.86, with discount $7.47
• D328A, $24.99, with discount $23.74
• 41-993, $5.22, with discount $4.96

Total for 6 plugs, wires, distributor cap and rotor, plus shipping to ZIP Code 17327 (from your info here), $106.60. All parts were in one warehouse (you do have to be careful about that at rockauto).


PM me here if you need a discount code.

Be sure to put some dielectric grease in those boots when you put them on.

 

It actually works out to be about $13 more from Amazon. However I have prime so I get in 2 days instead of about a week. I also have a bunch of points so I get money off. I ordered the wires and I should have them today. It was fine for 2 days and now it is misfiring like crazy again. So it is getting new plug wires this weekend.

Also I went to https://blazerforum.com/forum/diagnostic-trouble-codes-dtcs-49/p0410-explained-35146/ but the pictures aren't loading.

 

Loading the images must be something on your end, they load fine on my PC and mobile P0410 has 11 pages of diagnostics in the flow chart, not a fun DTC to troubleshoot. Worse than some of the EVAP flow charts Take your time, don't skip any steps, and you'll do fine.

 

Apparently they don't like firefox. The opened up fine on my home PC with Microsoft Edge.

In other news, I decided to do my plug wires today. The old ones were very hard and brittle. The new ACDelco ones were much nicer than the ones that were on there. I couldn't find a brand anywhere on them. cylinders 4 & 6 wires broke coming out.

Wire to cylinder 4


Wire to cylinder 6

 

So I did my plugs on Thursday and It has been running pretty good since then. Which makes sense since the plug wires were in pretty bad shape.

 

I decided to do a visual inspection of my Secondary air system and everything seems in tact at least. When I checked the vacuum lines I found this valve in there. At first I though it was a normal vacuum coupling but it has a spring and ball in it almost like some sort of check valve. Does anyone know what this is?





Also my P0410 code has been showing as a pending fault for several days now. My other codes that I resolved were showing as just regular faults.

 

Was that in the little vacuum line that goes back between the booster and the firewall?

That's a check valve. If it's in that little vacuum line, that's the part that keeps the HVAC system from switching to defrost when you take off hard or go up a hill.

 

That valve goes in the vacuum line that goes to the secondary air injection.

 

Looked under the car yesterday because the PO440 code is still present. Looks like when I had my leaf springs replaced they didn't put one of teh clamps back on the charcoal canister, and I smell gas when I get close to the canister.

 

So far I have fixed the first issue by replacing the old no name spark plug wires with ACDelco wires. I fixed the third by putting a loose hose clamp back in place on the charcoal canister and putting on a new gas cap. The airbag issue, I need to pull the carpet up and make sure the connector is tight. The P0410 issue is interesting. I decided to pull one of the lower hoses off to the pump and a pretty significant amount of water ran out. So I got a pump, valves and the injection valve from a junk yard. As soon as I can get the valves to break loose from the exhaust manifolds I will replace all the parts to see if the light goes off.