Engine Performance problem
1993 Other Saturn Models 4 cyl Front Wheel Drive Manual 172000 miles
Hi, my name is Daniel Scott. Last year I received a manual '93 Saturn SL2 (OBD1) from a friend with something like 14 miles per gallon. Before he gave it to me, he replaced the tensioner but in order to do that, he had to drop one side of the engine and afterwards was unable to start it. So he gave it to me and I got it running. When I found out about the gas mileage, I took it into a shop and had them run a diagnostic on it. Afterwards, they said everything was fine and that everything was running within specs. But I still had 14 mpg so, I continued to try to diagnose and fix the problem myself. After working on it for months, and hundreds of dollars later, I have only been able to raise the mpg to 17. However, that didn't last and now I am back down to 15 mpg. Also, when I step on the gas to accelerate quicker, it will periodically hesitate, buck a little, and lose allot of power, usually around 3000-3500 rpm just before I shift. The only codes it ever throws at me are an occasional "lean misfire" (code 44). I have researched like crazy all over the net trying to find a solution but still nothing. Here is a list of the things I have replaced or tried. Any help with solving this problem would be soooooo appreciated:
egr valve, fuel pressure regulator, air intake temp sensor, both engine temp sensors, ran 3 bottles of chevron injector cleaner through injectors and visually inspected them, o2 sensor, pcv valve, air filter, fuel filter, spark plugs/wires, and ran Sea Foam through air intake and egr lines…still nothing.
Thank you for any and all help!
have the same problem?
Monday, July 21st, 2008 AT 8:27 PM