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Registered
Join Date: Feb 2009
Posts: 33
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loss of power
I have a 1981 911sc that was running great, then the car started to loss power and back firing. Can any one help. thanks
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08-27-2012, 04:05 PM
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ROW '78 911 Targa
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Fuel filter clogged, cap, rotor, wires, plugs come to mind right away.
Possible air box leak. CDI failing, fuel pump relay coming loose.... And the list goes on.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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08-27-2012, 04:28 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,449
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when it's at normal operating temp, take out the interior light fuse on the front fuse box and see if the idle gets all rough. if nothing changes, you need to troubleshoot the oxygen sensor system, particularly the operating relay under the front of the passenger seat. it's powered by that fuse, and the relay powers the computer and frequency valve. the O2 computer is the big box behind the relay. bad relay, bad connection in the relay plug, water in relay or computer.... basically, if the computer doesn't work the frequency valve, the car runs like crap.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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08-27-2012, 04:53 PM
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Registered
Join Date: Aug 2012
Posts: 488
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I think John Walker's just answered the my question to the rough running I experienced on the drive home last night. Interestingly when I got home, I saw this wire had pulled out of the wire loom on the fuse panel. Voila! I will go reattach it and give it a whirl. Thanks!
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09-02-2012, 06:41 AM
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Heinz
