screwdriver Posted April 16, 2017 Share Posted April 16, 2017 (edited) Hello, I hope someone can help me with this. 1997 Outback. 4 cylinder. 5 spd. 260,000 miles. When you start out cold it revs normal but after warm up it starts shutting off at about 4300 rpm. It's not dying just cutting out like it's starving for fuel. When you back off the throttle and get below the 4300 rpm it's fine again. May be electrical of course. Any input on this would be appreciated speedometer stopped working at 256k 1) PO303 Cyl 3 misfire 2) PO500 Veh Speed Sensor A Malfunction 3) P1507 Manf Cntrl Veh. Spd. Idle speed control aux. inputs 4) P1540 Manf Cntrl Veh. Spd. Idle speed control aux. inputs Edited April 17, 2017 by screwdriver Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted April 16, 2017 Share Posted April 16, 2017 you might check for slipped timing, 1 tooth off? what's the general condition of the car? well maintained? new to you? when was the timing belt system last serviced? 1 Quote Link to comment Share on other sites More sharing options...
wtdash Posted April 16, 2017 Share Posted April 16, 2017 ^+1Check Engine Light on? If so, check the codes - even if you 'think' you know what the codes were for some previous issue. - Or Tuneups? - use ONLY NGK plugs and wires - Or Fuel filter? - Or CTS/coolant temp sensor - Or O2 Sensor 1 Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted April 16, 2017 Share Posted April 16, 2017 Tune up and fuel filter if there are no codes. GD 1 Quote Link to comment Share on other sites More sharing options...
screwdriver Posted April 16, 2017 Author Share Posted April 16, 2017 you might check for slipped timing, 1 tooth off? what's the general condition of the car? well maintained? new to you? when was the timing belt system last serviced? I bought it at 212k. new head gasket and timing belt around 225k. Quote Link to comment Share on other sites More sharing options...
screwdriver Posted April 16, 2017 Author Share Posted April 16, 2017 (edited) Tune up and fuel filter if there are no codes. GD a lot of codes. 1) PO303 Cyl 3 misfire 2) PO500 Veh Speed Sensor A Malfunction 3) P1507 Manf Cntrl Veh. Spd. Idle speed control aux. inputs 4) P1540 Manf Cntrl Veh. Spd. Idle speed control aux. inputs Edited April 17, 2017 by screwdriver Quote Link to comment Share on other sites More sharing options...
screwdriver Posted April 16, 2017 Author Share Posted April 16, 2017 (edited) ^+1Check Engine Light on? If so, check the codes - even if you 'think' you know what the codes were for some previous issue. - Or Tuneups? - use ONLY NGK plugs and wires - Or Fuel filter? - Or CTS/coolant temp sensor - Or O2 Sensor Thanks. I'll go down this list. The car runs perfect when cold, then when warm/hot it starts this stuttering at 4300rpm. 1) PO303 Cyl 3 misfire 2) PO500 Veh Speed Sensor A Malfunction 3) P1507 Manf Cntrl Veh. Spd. Idle speed control aux. inputs 4) P1540 Manf Cntrl Veh. Spd. Idle speed control aux. inputs Edited April 17, 2017 by screwdriver Quote Link to comment Share on other sites More sharing options...
screwdriver Posted April 17, 2017 Author Share Posted April 17, 2017 These are my codes 1) PO303 Cyl 3 misfire 2) PO500 Veh Speed Sensor A Malfunction 3) P1507 Manf Cntrl Veh. Spd. Idle speed control aux. inputs 4) P1540 Manf Cntrl Veh. Spd. Idle speed control aux. inputs Quote Link to comment Share on other sites More sharing options...
wtdash Posted April 17, 2017 Share Posted April 17, 2017 (edited) You're running in 'limp' mode likely due to VSS codes. P0500 was a recent code on here or another Subie forum I read. Google "Subaru p0500" (all zeroes) and see what shows up....or wait for the smart guys on here. :-) p1507 may be related to Neutral Switch. P1540 may be the VSS sensor. If this one is bad, it may cause the others. My money is on this. It's on the Pass. side of the transmission, near the Differential dip stick: The tip 'spins' on the gear in the trans to send a electronic signal to the speedo, and breaks/wears out. @ 260K it's been a-round a bit. useful: https://forums.nasioc.com/forums/showthread.php?t=1785548 & https://forums.nasioc.com/forums/showthread.php?t=1785548 Td Edited April 17, 2017 by wtdash 2 Quote Link to comment Share on other sites More sharing options...
screwdriver Posted April 20, 2017 Author Share Posted April 20, 2017 Thanks for all the great info and tips. I'll be trying these suggestions out as time and money allows. I'll post the results when I can Quote Link to comment Share on other sites More sharing options...
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