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#1 |
Senior Member
Join Date: Nov 2012
Location: branchville sc
Posts: 89
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Ok so def need an expert on this one. Had my ls1 tuned, its a motor tune. (also had nitrous tune and done same thing ). The issue im having is when I accelerate hard to race my car drops timing. We had it at 23 degrees and it dropped to 10 degrees. You can force it with the laptop to hold the time but on its on it drops. What could cause this. Thanks in advance for any help or suggestions.
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#2 |
Senior Member
Join Date: Jun 2008
Location: West Ash
Posts: 4,283
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Knock sensors and or knock sensor harness.
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#3 |
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Join Date: Jan 2012
Location: Rockingham, NC
Posts: 799
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[IMG] ![]() 1999 WS6, 6.0L, S480, TH400, Dana 60 1967 GTO 496" Poncho stroker, 4 speed, 4:11s 2007 Hemi Ram 2013 Grand Caravan RT 1997 Civic |
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#4 |
Senior Member
Join Date: Nov 2012
Location: branchville sc
Posts: 89
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The knock sensors will cause that? Dam .. that's why I asked the experts cause I would have never thought of that. Thanks! Will check tomorrow and let ya know what I find. Again thanks for the info
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#5 |
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Join Date: Aug 2010
Posts: 1,224
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Unless you ask shartbody. His seems to be the only motor that won't pull timing.
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#6 |
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Join Date: Mar 2009
Location: Summerville, SC
Posts: 1,525
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You can log everything that can/will retard the timing and see what's doing it
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#7 |
Senior Member
Join Date: Nov 2012
Location: branchville sc
Posts: 89
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Unplugged the knock sensor and deleted them from the computer and my car ran like a scalded grape ape! Thanks for the help!
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#8 |
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Join Date: Jun 2008
Location: West Ash
Posts: 4,283
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I'd plug them back in, if it is sencing spark knock that much it'll beat the bearings out of. It with all the timing
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#9 |
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Join Date: Jul 2008
Location: MACEDONIA
Posts: 4,967
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I know a guy that works at Gm that can get you the parts.
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#10 |
Senior Member
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Some say he is the sexiest parts guy GM has
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#11 |
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Join Date: Jul 2011
Posts: 2,041
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Some?? Ive been trying to find 1 person to say otherwise.
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#12 |
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Join Date: Aug 2009
Location: Ladson SC
Posts: 4,388
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and if he's lucky, i will be buying him breakfast in the AM while my TPMS sensors are installed....
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#13 |
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Join Date: Oct 2011
Location: Easley
Posts: 2,300
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Pffffft. I aint got no knock sensuh's.
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#14 |
Senior Member
Join Date: Nov 2012
Location: branchville sc
Posts: 89
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Well it wasn't the knock sensors . Ran good for a bit went to race a ta and started doing the same thing again. Could it be the computer?
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#15 |
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Join Date: May 2009
Location: Charleston, SC
Posts: 1,489
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You really need to log all the timing PIDs so you can figure out what is going on. Sounds like you're sort of killing skeeters with a shotgun.
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Jaime |
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#16 |
Senior Member
Join Date: Mar 2009
Location: Summerville, SC
Posts: 1,525
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It won't let me upload it, but I have a timing evaluation cfig that has everything that can adjust timing. Send me your email and you can use it as well to see what your problem is.
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