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Old 03-22-2007, 05:07 PM   #1 (permalink)
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Knock retard

Hey guys, its been a while since I've been on the board hope everybody is doing well. I've got an 86 GN 93000 miles with an old Hypertech chip ( I know) Walbro 340 and adj. fpr. I'm getting 35 degrees of knock retard at idle and was wondering if I might have a bad knock sensor or could it be something else. Btw o2 checks fine TPS is good and BLM is ballpark. Any help would be greatly appreciated .
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Old 03-22-2007, 05:32 PM   #2 (permalink)
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Pretty hard to get knock at idle so i would guess something else is causing the timing retard.

If you pull the connector off the knock sensor, does the engine idle properly and drive normally? Just normal wot stuff.

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Old 03-22-2007, 07:39 PM   #3 (permalink)
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What are you using to monitor KR?
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Old 03-22-2007, 07:42 PM   #4 (permalink)
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The car still runs with 35deg KR? When I got that much KR at idle the car would just stall. Turned out my maf pipe was touching the alternator pulley at idle.HTH
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Old 03-23-2007, 12:05 PM   #5 (permalink)
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I'm using a Mac Tools Taskmaster for my scantool. Steve when I unplugged the knock sensor the idle began to drop towards a stall until I plugged it back up. There's anything other than WOT? I don't think I'm actually getting that much retard the car is pulling too hard. Faulty reading or incompatible scantool .
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Old 03-23-2007, 12:17 PM   #6 (permalink)
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when I used my Auto Xray scan tool it would put my car into limp mode and it would show 35* of knock retard...but car ran fine and would show no codes....some scan tools do not work...which is why I have a scan master DS and PL...could just be the scan tool
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