It has been a while since I've been here, just getting back from Iraq and preparing for surgery has taken up all my time.
My car is an 03 GT, 91000 miles. It was running great until yesterday. I drove it on Saturday for about 2 hours, and stopped by the gas station on base and put in $10. I was going to my in-laws yesterday to pick up some stuff, and gas is about 10 cents cheaper there than here.
When I started the car, it started to spit and sputter, then went to a semi normal idle. The idle had a bucks it in, one about every 3-5 seconds. I have an AFR and it was all over the place during idle, 12.5 - 16. The tune I have is 14.6 across the board. I thought ok, I got bad gas. I went and picked up some STP water eliminator, and STP injector cleaner. I added that today and started it up, and it did pretty much the same thing. After idling for 20 minutes, I went to get more gas, off base this time. While driving, the AFR was even more nutz. I downshifted to turn out of my houseing edition, my AFR went to 11, when I gave it gas it jumped to 18. On the highway, I was in 5th @ 60 mph, if I gave it gas, it would sometimes jump up to 22 AFR, when I let off, it could go to 10.5. I stopped on the side of the highway and took off, after 1500 rpms.....it would level off at 14.6 until about 3500 rpms, then it would consistantly drop so that 4500 was a 12 AFR, all gears. I did it twice to make sure it wasnt a fluke. One last thing to add, my fuel pressure gauge is normally near 40, all day while I was driving, it was 30-35, usually around 30.
After getting new gas, it still acts the exact same way. Still the hickup in idle every 3-5 seconds, not noticable when given revs. Does anyone have any idea what could be causing this? Fuel Pump, Fuel Filter...or just bad gas that needs time to work out.
Thanks
My car is an 03 GT, 91000 miles. It was running great until yesterday. I drove it on Saturday for about 2 hours, and stopped by the gas station on base and put in $10. I was going to my in-laws yesterday to pick up some stuff, and gas is about 10 cents cheaper there than here.
When I started the car, it started to spit and sputter, then went to a semi normal idle. The idle had a bucks it in, one about every 3-5 seconds. I have an AFR and it was all over the place during idle, 12.5 - 16. The tune I have is 14.6 across the board. I thought ok, I got bad gas. I went and picked up some STP water eliminator, and STP injector cleaner. I added that today and started it up, and it did pretty much the same thing. After idling for 20 minutes, I went to get more gas, off base this time. While driving, the AFR was even more nutz. I downshifted to turn out of my houseing edition, my AFR went to 11, when I gave it gas it jumped to 18. On the highway, I was in 5th @ 60 mph, if I gave it gas, it would sometimes jump up to 22 AFR, when I let off, it could go to 10.5. I stopped on the side of the highway and took off, after 1500 rpms.....it would level off at 14.6 until about 3500 rpms, then it would consistantly drop so that 4500 was a 12 AFR, all gears. I did it twice to make sure it wasnt a fluke. One last thing to add, my fuel pressure gauge is normally near 40, all day while I was driving, it was 30-35, usually around 30.
After getting new gas, it still acts the exact same way. Still the hickup in idle every 3-5 seconds, not noticable when given revs. Does anyone have any idea what could be causing this? Fuel Pump, Fuel Filter...or just bad gas that needs time to work out.
Thanks