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Originally Posted by shorod
You didn't happen to recently switch to ethanol fuel, did you? What was your fuel economy before with the A/C on?
You may want to check the Mass Air Flow (MAF) sensor for contamination and connection, make sure the intake air temperature (IAT) sensor is connected, and check the coolant temperature sensor.
Did you change all those items in an attempt to improve the fuel economy, or did your fuel economy drop after you replaced everything? If the latter, then I'd suspect that you didn't get something connected properly as a result of replacing items, and I'd start with the MAF and IAT. Also make sure that the intake air hose is tight and installed correctly. Although if the hose is not correct, you'd likely have other driveability concerns.
-Rod
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Thanks Rod, here is what has happened over the past 6 mo.
At first I had a miss on cyl #3. I was only getting about 14mpg. While I was tryng to fugure out why it was missing, my fuel millage went UP to 19mpg while it was still missing???? I found that the plug porcyln (sp?) was cracked on #3 so I replaced ALL the plugs with AutoLite double plats. Car ran Great, but was only getting 14mpg. All the other changes were BEFORE the plug change. I thought that some computer must of compensated for the missing cyl and brought my fuel millage up to 19mpg. Now, after I corrected the miss, I thought that this so called computer would bring BACK better millage after a few thanks of gas but has not.
I will check the status of the MAF and IAT connection and coolant connection and get back to you Rod.
Thanks again for your quick responce and all your help in the past.
Rob Roy