pdc Posted May 8, 2009 Share Posted May 8, 2009 I just bought a 2001 Legacy GT Limited from a non-car guy who got fed up with it for $500. Non-Turbo, Automatic basic transportation. The car has a lot of miles on it 240k but is in nice condition. It's had a new tranny (auto) and new head. It runs perfect except....and this is the reason he got rid of it, It sometimes/most times studders/cuts out when tring to accelerate, even mildly. It feels to me like a spark plug problem/cylinders cutting out. But, the guy had the dealer replace the plugs and wires and it didn't fix it. The mechanic recommended changing the air/fuel ratio sensor next. But the guy was sick of spending money on the car and sold it to me. Someone suggested to me cleaning the Mass air sensor. Is that the same thing? Any suggestions? The car at times has full power and runs smooth which leads me to believe it is an electrical issue. The is no CEL. pdcView Public ProfileSend a private message to pdcFind More Posts by pdc[/url]iTrader: (0) #2: Today, 08:58 AM Link to comment Share on other sites More sharing options...
ehsnils Posted May 9, 2009 Share Posted May 9, 2009 Check the fuel pump pressure too, it may be something wrong with the pump causing it to not always give full pressure. Throttle position sensor and as you noted mass air flow sensor are also potential causes. If possible - use a code reader to check if you have any codes. Sometimes there are codes without a CEL. And if you get an OBD-II cable and a PC you can actually read the sensor values too. Of course - it may also be another problem like a bad hose or even the PCV valve that's acting up. Link to comment Share on other sites More sharing options...
pdc Posted May 10, 2009 Author Share Posted May 10, 2009 I seafoamed it today and drove it again. It seems strongly like a cylinder isn't firing. It goes from full power to dogging and back to full power. It doesn't feel like a fuel delivery problem. The plugs and wires are new. Could a failing coil behave like this? Link to comment Share on other sites More sharing options...
pdc Posted May 20, 2009 Author Share Posted May 20, 2009 Still having this problem. It does't cut off it's power just cuts, then by feathering the gas it will"find itself" again. I tried a new coil pack cause it seemed like cylinders were cutting out but that didn't help. Someone suggested a clogged Cat, but the exhaust doesn't sound constricted. I took out the front O2 sensor to see if that made any difference, but no change with it out. I also thought that releasing some exhaust through the hole might help troubleshoot the clogged Cat idea. I'm stumped. How would the TPS cause this? Can it be tested? Any other ideas? Car has new fuel lines, filter and pump. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.