I have a 94 TA with 85000 miles on it that is knocking and bogging down when accelerating under load. It seems like the drivers side cylinders are cause of knock. I have taken a freescan sample and can see the knock count go up dramatically when this happens. Is there anyway to tell if this is an optispark problem or can anyone analyze Freescan readings.
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I assume your talking spark knock........whats the advance? How about fuel pressure and O2 readings?96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
11.6 @ 123mph (1.6 60' - getting there
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Here are some of the readings from Freescan.
RPM Road O2 L O2 R BLM BLM L BLM R Intergrator IAC
Speed Cell L R
2150 14 0.675 0.107 7 135 130 123 132 85
1475 17 0.049 0.084 14 139 145 132 134 87
MAP TPS MAT Knock Knock Volts Air Spark Coolant MAT
Volts Retard Count Flow Timing
0.48 20 2.29 4.3 10495 12.6 33.47 41 95 47.8
0.89 36 2.29 13 11410 12.5 52.97 5 95 47.8
Format didn't come out wellComment
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If you want to e-mail me the FreeScan file, in .csv format, I'll be glad to take a look at it for you. My e-mail is linked in the post. Be sure to identify the subject of the e-mail with your screen name, so I know I can open the attachment.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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Man, you are tooOriginally posted by Injuneer
'95 White Z28 M6 Cold air intake with K&N air filter, air foil, flowmaster cat-back, eaton posi, motive 4.10s, aluminum driveshaft, "skip shift" eliminator, '97 Z28 chrome wheels, hypertech programmedComment
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Fred thanks for the help. I sent you an email with the .csv attached.Comment
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