93 SSEi has POOR acceleration...10-20* of Knock (Stock) - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-19-2007, 09:11 PM   #11
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It is to the left of the oil filter adapter. It'* hard to see, but it'* there.
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Old 08-19-2007, 09:24 PM   #12
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Is the ECM showing the same temperature as the gauge?
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Old 08-20-2007, 02:07 AM   #13
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Quote:
Originally Posted by Technical Ted
Is the ECM showing the same temperature as the gauge?
Yes, when I had a scantool hooked up it was very close to the same. within 5* IIRC

Tonight it runs better than it did..the temp dropped 20* to 60 and it runs almost as good as it should.
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Old 08-20-2007, 02:20 AM   #14
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the knock sensor location can kinda be seen in this pic Hans, its under that small metal sheild on the center of the block, right below the exhaust collector...the yellow connector

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Old 08-20-2007, 02:21 AM   #15
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By the way I found the knock sensor. I did not unplug it though for 2 reasons.

1. I read it will automatically pull 10* of timing with it unplugged.

2. I cant figure out how to unplug it.
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Old 08-20-2007, 07:23 AM   #16
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Just had another thought...are you running with or without a MAF screen?
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Old 08-20-2007, 09:30 AM   #17
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The plug is a squeeze clip. You have looked for anything rattling, loose or rubbing correct?
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Old 08-20-2007, 09:31 AM   #18
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In addition to the MAF screen and the typical vac leaks, have you checked for EGR leaks?
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Old 08-20-2007, 09:49 AM   #19
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Hmm...you said you just replaced your plugs, wires, and O2.




Per chance, is the O2 wire routed really close to the spark plug wires on that bank? That could throw off your O2 readings quite a bit.
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Old 08-20-2007, 11:44 PM   #20
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It may be an O2 issue since it appears to have better performance in open loop mode, but I thought the o2 had little to do with WOT performance.

I am running a MAF screen. the O2 wire is FAR away from the plug wires, I route the plug wires very close tot he engine and have the o2 wire running along the firewall.

Nothing I can see is loose in the engine bay.

I reset the PCM overnight (after replacing the fuel pump) It appears to run slightly better. Still not perfect power (top end still weak) but my theory was the PCM was used to the failing FP I had in there.

O2 has about 10,000 miles on it, I replaced it after WCBF last year. It is a delco from GMPD
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