I don't want to replace unneccessary items, of course. However, when I was talking to my mechanic, he said he's been having several of the Ecotec's throughout GM begin to inject too much fuel after they get around 100k, and the MPG will begin to drop. Also, he noted that the exhaust coming out of the tailpipe was measuring that with his scanner (I saw it myself). He said that the sensors won't read the difference, since it gets burned, but the PPM come up higher in burned gas, which means that it's all getting burned up, but at a higher level than what it was engineered for. So, the only thing he said is the end result, is the gradual dropping of MPG. I also had Firestone do a full Scan on their fancy machine, and they said it doesn't throw a code, but the tailpipe probe they stick in there comes up with a high-normal reading (density).
Since this was a small purchase, and I'm going to change the plugs anyway, I thought I wuold just change both at the same time. So, thank you for the #'s and also the great advice. I see it as more of a small investment of my time and little money for a car I plan on keeping till it runs no more. :)

 

Great! yeah I saw the previous posts about that, and i think you had mentioned this a couple years ago.

 

Don is right regarding the Fuel Injectors - there is no point in replacing them for no reason.

The Fuel injectors typically last the life of the car, or until they actually cause a problem. Because that article says they typically last between 50K and 100K, is absolutly no reason to replace them at this point if they are not causing a problem.

You will know when an injector needs replacing as they will throw a CODE related to fuel/injector issues and light up that CHECK ENGINE LIGHT - if neither is happening, just leave them be.

 

Ok, I’ll take your advice and wait till I get a code. Thanks!

 

If you really want to, take them out and have them flow tested.
That will tell you if they're still in spec or close to getting new ones.
Any fuel injection place that does this can test them.

 

Sorry to be a bother in this thread but did we ever decide what the part number for the thick seals were? The ones that seal the end of the injector and the engine.

Thanks
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Soak in MEK if you can find it, where gloves. If you have a cut, MEK will find it. I worked on many fuel injected and turbo aircraft engines, but they were a different cat. No electronic bs, keep it simple stupid, is no longer the game.

 

Lao, for be care what you ever put on seals. Some are very specific about what they are made of, and what you use.

 

MEK is just for metal, not seals

 

Replace all seals, orings, anything like that. It is not worth a $1.00 deal to reuse, no mater good they look.