I took my camaro to a local dealership to take care of some repairs. My engine has been idling kinda rough lately...and I only get 200 miles per tank. I've changed my pluges to tr55ix and put in some msd wires. plugs were gapped at 0.060 and then changed to 0.040 but my mpg didn't improve. The dealer said that there wasn't anything wrong with my car. they drove it with a computer hooked up to it and said the the fuel curve was good....they said something else was good but I don't remember what it was. any ideas what the hell could be going on.

I bough the car used from a gm dealer. since i've purchased the car i changed the fuel filter, air filter, plugs, and had one o2 sensor changed by the dealer. wtf is going on here...could it be my maf screwing up...but not enough to send a code???

 

Without hearing anything, I'd recheck all of the plug wires. Easy way to verify you're firing on all cyl's is to pull one at a time at idle. If you pull one and note no change, you found your bad wire.

Prob not the issue, but a quick and cheap check. Been burned (not literally ) by bad wires more than once....

Later,

Allen