93 Subaru Legacy bogging down

Tiny
MDBONJR
  • MEMBER
  • 1993 SUBARU
My 1993 Subaru Legacy is idiling rough and bogs down when you try to give it gas (it will rev up if you butterfly the gas pedal). If you put it in gear, it wants to die and will not rev up at all). It has an EJ 22 (2.2 liter) non-turbo engine with 160k miles. We have replaced the TPS, MAF, IAC, coil, plugs, wires, ECM, fuel pump, and knock sensor. This didn't change anything. The components came off of a running 93 Legacy with no codes. Now we are getting codes for the knock sensor, MAF, TPS, and Air Control Valve. Is there a common electrical connection that could be causing our trouble or is there anything else that we might be overlooking? Any help is greatly appreciated! Thanks, Dean
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Tuesday, June 12th, 2007 AT 4:52 PM

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Tiny
MDBONJR
  • MEMBER
There is definitely an electrical problem with this car. We picked the car up two days ago. We had to remove the lower steering column cover to get to the key lock release because we were unable to get the switch to roll back to the locked position to remove the key. We swaped the switch out with a working switch and had the same problem. The release is controlled electrically and when you unplug the wires to the release solenoid you can get the key out. Not really sure how this is related to the engine problems but if someone out there knows of a possible common switch, relay, ground, solenoid and connection that ties all of these elements together it would be great to know about it. If not, looks like we'll be tracing out the wiring for the next few days. Thanks again, Dean
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Tuesday, June 12th, 2007 AT 7:13 PM
Tiny
MDBONJR
  • MEMBER
We've managed to locate the MPFI module and replaced it. This got rid of two of the codes. We're getting a code for the TPS and IAC only now. These two share a common wire that is routed through the ignition relay according to schematics. Where is this relay located on the 93 Legacy? I think I might have located it but would like to be sure before tackling replacing it, it's a bugger to get to. Thanks,
Dean
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Friday, June 15th, 2007 AT 11:40 PM

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