wtdash Posted October 16, 2006 Share Posted October 16, 2006 97 OB 140k (Head gasket @ 125K) - mild surging @ 30-40 mph; just noticeable @ cruising speeds - 65-75 mph. Could it be the TC going bad? O2 sensors are both replaced; cleaned throttle body, but not the deep cleaning via the vacuum hose. Plugs are good. IAC? TPS? Thanks Link to comment Share on other sites More sharing options...
Manarius Posted October 16, 2006 Share Posted October 16, 2006 I'd try cleaning the TPS...that can sometimes cause tranny searching. Link to comment Share on other sites More sharing options...
nipper Posted October 16, 2006 Share Posted October 16, 2006 not the torque converter, they either work or they dont. What happens if you drive in D3 nipper Link to comment Share on other sites More sharing options...
NoahDL88 Posted October 16, 2006 Share Posted October 16, 2006 Is it at part throttle? it could be the torque converter lockup solenoid disengaging and reengaging repeatedly. Link to comment Share on other sites More sharing options...
wtdash Posted October 17, 2006 Author Share Posted October 17, 2006 Is it at part throttle? it could be the torque converter lockup solenoid disengaging and reengaging repeatedly. Noahdl88 - Yes, part throttle is when it occurs. Driving city streets @ 30-40 is most noticeable; also @ freeway - 65-75. If the TC were engaging/disengaing wouldn't the rpms change, too? If it were the solenoid is that in the tranny? Also, at idle the car shakes a bit - not like it's going to die or anything's going to shake loose. But it's definitely not a smooth idle. But the rpms change very little if @ all @ idle. Link to comment Share on other sites More sharing options...
wtdash Posted October 17, 2006 Author Share Posted October 17, 2006 not the torque converter, they either work or they dont. What happens if you drive in D3 nipper Nipper - I tried the D3 and it's still there, but not as noticeable as when the car is loafing along in OD @ 35-40 mph. Also, at idle the car shakes a bit - not like it's going to die or anything's going to shake loose. But it's definitely not a smooth idle. But the rpms change very little if @ all @ idle. Link to comment Share on other sites More sharing options...
wtdash Posted October 23, 2006 Author Share Posted October 23, 2006 I think I fixed it. It may have been a barely loose plug wire. I'd been in there the week before taking off an underdrive pulley (2MPG!), and bumped it....unless it just needed me to open the hood and say "boo!" Link to comment Share on other sites More sharing options...
idosubaru Posted October 23, 2006 Share Posted October 23, 2006 i'd guess ignition related. how old are the wires? best if they are Subaru OEM wires or Magnecor on any EJ series engine. any others are questionable. might want to consider replacing if they are old or this returns. if it returns check the previously loose wire for damage. Link to comment Share on other sites More sharing options...
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