So I've been getting really bad MPG lately (like 15).. I've replaced or checked everything I can think of. Is there a way to test the fuel injector voltage to ensure they are good? What volts should I be looking for? It's a 2001 monte ss 3.8 n/a

 

I don't have any books on me right now.

What did you replace?

 

Fuel filter, spark plugs, plug wires, pcm, downpipe with highflow cat, checked all vacuum lines.

So i just went out and checked them all quick and they were all 14 ohms. I'm guessing that good since they are all the same. I'm gonna clean the MAF today. Does anyone know if i have to pull the TB for that?

 

No need to pull the TB. You just need to remove 2 T-20 Security Torx bits.

Could also need to change your o2 sensor on your rear manifold.

 

Ok thanks... I forgot to mention I replaced the 02 last week when i did the downpipe.

 

Which o2?

There is one on the rear exhaust manifold and one on the downpipe.

 

The one on the exhaust manifold. With ac delco.
So I cleaned off my maf sensor and it seems to be idling a little smoother so i hope i get better mpg when i check next. If not im not sure what it would be..