Well, I guess, some of you may know my story by now. About fighting a fuel milage issue. I took my car to a shop, after several failed attempts to fix my fuel consumption issues.
I dropped my car off at a Good Year Auto shop, close to where I work and went over to Applebee's for a few brews and dinner. After I returned, the fellow was nice enough to let me in on the project and show me what's been going on. At first, he told me my ECT Sensor was shot and it turned out, he was testing the fan control switch, in the thermastat housing. I pointed out that the ECT was infact in the rear of the throttle body and he was working on the Coolant Fan control switch. Hmmm.... I kinda had a few doubts, but I just walked away and went to the bar.
So, when I returned to the shop, him and I looked things over and he found that my ECM was just fine......and infact, all of my electronics were just fine.
After a while, he decided to check the fuel pressure with a guage. WOW!! 60 PSI?? There's no wonder I'm getting lousy milage!! The fuel pressure through the Throttle Body should be between 16 - 23 PSI. He ran a line, from the fuel return connector to a bucket, and the car ran like a clock. The fuel was able to freely run out the return then.
Sure enough, the return line was completely plugged up. I could not blow through it. So......after finding out that blowing through it would not work, I went and got my air compressor. I hooked the return line to the air nozzle and triggared it open and it seemed like it was still plugged. I noticed that the regulator on the air compressor was set at 60 PSI, so I cranked it to 125 PSI and blew through the return line again!! At this time, a stream of gas shot out the filler and onto my truck. LMAO!! So I figured that it should be unplugged now. I hooked everything back up and went for a drive. SO far, the car runs great. I went into town and topped off the tank. I should know in the morning, how it does at start up. Hopefully, I'll have more good news to bring.
This message goes out to DoctorBill. While you're cleaning out your Throttle Body, you may want to check your fuel return line and make sure it's completely clear, because if the fuel is not flowing freely through the FPR and back to the fuel tank, then it could fuck with your gas milage in a bad way. LOL So, to those other folks out there, who are getting lousy milage, you may want to check that out as well.
Good Luck. I hope this input will help some or all of you. I'll keep you all updated as to how this effects my gas milage.
Leon