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11-27-1999, 09:39 AM
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#1 |
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Registered Member
Join Date: Nov 1999
Location: california
Posts: 22
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Will cooler plugs cure lean running 98GT?
Running stock plugs still-
pro-m77,shm h-pipe w/cats,svo pulleys,flows, 3.73's- Bothersome higher rpm pinging under full throttle w/89 octane,slightly less with 92- any ideas? |
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11-27-1999, 01:47 PM
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#2 |
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News Editor
Join Date: Apr 1999
Location: Concord, CA
Posts: 2,101
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If your pinging stops with some octane booster than I would should suggest, drainging your EEC. Disconnect your negative cable from the batter. Wait for the light onthe hood to dim out, and then leave the driver's door open for 3 min. Reconnect the cable. It might run rough for a while, but thats because the EEC needs to relearn its adaptive stategy. If it still runs lean after a couple days, let us know.
------------------ '94 Cobra 308ci, ported GT-40 heads, Crane 2031 cam .513"/.529" lift 276°/282° duration, 70mm TB, Custom 80mm MAF, JMS chip, Vortech S-trim 8#, MSD, TREX fuel pump, Accel coil, 3.55's, FMS 1 5/8 headers, BBK Offroad H-pipe, and 2-chamber flows. 1994 Mustang Cobra Check out the pics of my Motor Buildup! |
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11-27-1999, 06:56 PM
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#3 |
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Registered Member
Join Date: Nov 1999
Location: california
Posts: 22
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thanx,I will give that a try-
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11-28-1999, 10:43 PM
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#4 |
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Registered Member
Join Date: Sep 1998
Location: Jonesborough, TN USA
Posts: 167
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Replace the factory spark plugs with NGK TR-55 which are a little colder if resetting the computer doesn't help. The factory Platinum plugs aren't good for performance just last a long time. Let us know your findings.
John Edwards Mod Motor # 2 13.71 @ 100.69 Yellow 99 GT |
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11-28-1999, 10:47 PM
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#5 |
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Registered Member
Join Date: Sep 1998
Location: Jonesborough, TN USA
Posts: 167
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Also if you have a 99 GT Pro-M recalled their 77mm meters for improper calibration.
I sent mine back and had it recaibrated. Haven't run it yet to see the diffrence. Mine would also ping on the 2-3 shift but I just retarded the timing a little with my steeda timing adjuster. |
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11-29-1999, 11:23 AM
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#6 |
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Registered Member
Join Date: Oct 1999
Location: Stony Point. NY
Posts: 18
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Mine did that too until I had my Pro-M recalibrated. Everything runs smooth now.
------------------ 99 Laser Red GT Mods: 70mm TB, Level 10 Chip, FMS 3.73's, Sean Hyland Speedo Recalibration kit, Pro 5.0 Shifter, & Pro-M 77mm MAF. DynoJet: 242HP/286 Lb/ft Best 1/4: 13.839@99.1MPH on radials. |
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11-30-1999, 01:48 AM
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#7 |
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Registered Member
Join Date: Nov 1999
Location: california
Posts: 22
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What gap on the TR55'S?-
98 GT= SHM H-PIPE,SVO PULLEYS,PRO-M77, 2 CHAM. FLOWS,PRECISION 3.73'S- 212 RWHP / 277 RWT |
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