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Anybody know what the minimum temperature is for the PCM to go into closed loop is on the 99+ cars? I know the thermostat is 180*, but I'm wondering if a 170* thermostat would be cool enough to make it go in and out of closed loop. Thanks.
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Wife and a dog, they both think they\'re Kujo.<br /> <br />1999 3.8 A4 Y87<br />Navy Blue Metallic<br />BFG G-Force KDWS 275/40/17s, <br />WS6 Wheels (17x9)<br />Phoenix Transmissions 2400 Stall Converter<br />FRA, Holley Powershot filter, Whisper Lid, Ported Throttlebody<br />2000 manifolds, Flowmaster, WS6 Tail Pipes, <br />MSD 8.5mm Wires, MSD Coils, Autolite plugs<br />Performance Cryogenics treated rotors<br />1LE Sway Bars and panhard rod, 1LE front springs w/SLP Bilsteins, stock rear springs w/ 3rd Gen Bilsteins, BMR STB, KBDD SFCs, 1LE rear lower control arms, 1LE front lower control arms<p>1968 Chevelle Malibu 327 TH350 -
If you can find a 170 anywhere, let me know... That would be the perfect one for me. The 180 is ok, and the 160 is a little too cool. I can't find anyone who makes a 170 though!\'98 A4 Camaro v6->v8 conversion, and STS kit next<br />v6: 13.6 Powerdyne, 13.2 150 shot, 13.8 120 shot, 14.3 85 shot, 15.7 stock<br />v8(na): 12.18@113, 392rwhp<br />Moderator on <a href=\"http://www.mtfba.org\" target=\"_blank\">www.mtfba.org</a> and <a href=\"http://www.frrax.com\" target=\"_blank\">www.frrax.com</a> (Road Race & Autocross)<br /><a href=\"http://community.webshots.com/user/johnduncan10\" target=\"_blank\">Car pics</a>, <a href=\"http://www.trscca.com\" target=\"_blank\">TN Region SCCA</a> -
Agreed- what is the closed loop temp?AIM: escalier deverre<br />\'02 Pearl Blue Metallic RSX-S (daily driver)<br />\'98 Black Firebird<br />98 V6 turbocharged to 02 LS1 swap<br />\'02 LS1/4L60E<br />LS6 Block, LS6 Intake Manifold, Thunder Racing 215/220 .600/.523/115 Cam, Titanium Retainers, Crane Double Valve Springs, 125 shot NX Wet Kit w/ NOS brand Purge, True Dual \"H\" Pipe w/ two chambers and dumps, 17x11(rear) and 17x9.5(front) Black Powdercoated ZR1 Replicas on 315 and 275 BFGoodrich Comp T/A\'s (Street)/ET Drags/Skinnies on Weldlites(Track), 3.42/LSDComment
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I think its about 145'ish.Keith - Chicago<br /><a href=\"http://www.hptuners.com\" target=\"_blank\">HP Tuners - PCM Reprogramming</a><br /><a href=\"http://www.dxsoftware.com/magnus/\" target=\"_blank\">97 Firebird V6 to LS1 swap</a><br /><b>V8 9.967@132.78</b> 1.322 60\' NA Heads/Cam<br /><b>V8 10.295@128.48</b> 1.363 60\' NA Cam Only<br /><b>V8 10.987@119.31</b> 1.422 60\' NA Stock Internals<br /><b>V6 13.674@98.22</b> NA<br /><b>V6 12.394@104.91</b> N20 100HPComment
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<blockquote>quote:</font><hr>From the GM Service Manual:
To provide the best possible combination of driveability, fuel economy, and emission control, a closed loop air/fuel metering system is used. When the vehicle is first started, the PCM controls fuel delivery in open loop, ignoring the HO2S signals and calculating air/fuel ratio based on inputs from the engine coolant temperature, throttle position, and mass air flow sensors. The PCM will begin using the HO2S 1 signal for controlling fuel delivery (Closed Loop). when the following conditions have been met:
The HO2S output signal is varying, indicating that the sensor is hot enough to operate properly.
The Engine Coolant Temperature sensor indicates coolant temperature above 40°C (104°F) with manual transmission vehicles or above 20°C(68°F) with automatic transmission vehicles.
Time since start-up is at least 15 seconds for a warm engine or 90 seconds for a cold engine. <hr></blockquote>Matt
1998 Mystic Teal Camaro M5
Whisper Lid, Pacesetter Headers, Catco Cat, Dynomax Super Turbo, B&M Shifter, BMR STB, LSD, P&P Intakes, GT2 Cam, Comp OE Lifters, 1.7 Roller Rockers, Pushrods, SSM Heads, DHP PowrTuner.Comment
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Does the 1999 Camaro have a 180 or 195 degree thermostat? According to the tech database it is 180 however someone on the board said that was a typo in the tech database.SLP CAI, K&N, Whisper Lid, 180* thermo, manual fan switch, 3.42 gears, Auburn Pro LSD, Wester\'s PCM Tuning, TSP Rumbler, High Flow Cat. Best Time: 9.909@71.58 (1/8 mile)Comment
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Here's the p/n for a 170* thermo 10220957. It's about $4.00 from gmpartsdirect.com.
Magnus, I didn't think it was that low. Do you know if it's higher in a 3.4, because I put a 180 thermostat in my 3.4 when I had it, and the gas mileage went way down, and I assumed it was because the thermostat was keeping below the closed-loop temperature.
98Camaro3.8, does your manual give the temp required to go into closed loop after the warm-up is complete? I haven't really checked mine, but I'll see.Wife and a dog, they both think they\'re Kujo.<br /> <br />1999 3.8 A4 Y87<br />Navy Blue Metallic<br />BFG G-Force KDWS 275/40/17s, <br />WS6 Wheels (17x9)<br />Phoenix Transmissions 2400 Stall Converter<br />FRA, Holley Powershot filter, Whisper Lid, Ported Throttlebody<br />2000 manifolds, Flowmaster, WS6 Tail Pipes, <br />MSD 8.5mm Wires, MSD Coils, Autolite plugs<br />Performance Cryogenics treated rotors<br />1LE Sway Bars and panhard rod, 1LE front springs w/SLP Bilsteins, stock rear springs w/ 3rd Gen Bilsteins, BMR STB, KBDD SFCs, 1LE rear lower control arms, 1LE front lower control arms<p>1968 Chevelle Malibu 327 TH350Comment
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<blockquote>quote:</font><hr>Originally posted by mjparme:
Does the 1999 Camaro have a 180 or 195 degree thermostat? According to the tech database it is 180 however someone on the board said that was a typo in the tech database.<hr></blockquote>
Yes, it is 195 degrees, that needs to be changed by Magnus in the Engine Tech section.Robert - owner www.FirebirdV6.com/CamaroV6.com
"Mid-life crisis? I'm way beyond that!"
1996 Black Firebird GTxxxRam Air V6 w/ M5xxxwww.FirebirdGT.com
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