service engine soon light on formula 350
06-19-2001, 07:43 PM
#1
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Location: Kirkwood, MO, USA
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Car: 1984 Z28
Engine: 454
Transmission: Th400
Axle/Gears: 3.73
service engine soon light on formula 350
Filled gas tank with 92octane, lite disappeared. Problem solved?
06-20-2001, 05:35 PM
#3
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Join Date: Mar 2001
Location: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
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Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
When was the last time you checked the Muffler Bearings?
seriously, Because you are running at least 9.3:1 compression, you should run 92+octane. If you wanted to know... octane in gasoline does a few things, one, it allows the fuel to burn slower, and with higher octane it will also burn cooler.
Think about when you put cheep gas into an old car that does not have knock retard. It spark knocks like crazy. The reason is the fuel is exploding too early for the timing.
So to fix the problem you either use higher octane or a knock sensor that takes care of your knock problem.
Higher octane therefore will allow you to advance your timing slightly to help with added power.
Hope this helps...
------------------
87 Formula 5.1 converted to TPI Yellow/Black
SLP Dur 206/212, Lift 480/487, Cent Line 112 cam, SLP headers, SLP cat-back exhaust
K&N Airfilter
Modified Stock cold air intake
Ported & polished Stock TPI intake
Holley Adjustable Fuel Press regulator
AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit
Aluminum Driveshaft
3.73 Posi gear
Baer 12" brakes 4 wheels
KYB AGX Adjustable Shocks & struts
Hotchkis strut tower brace
South side machine frame connectors
Custom reinforced control arms and pan hard bar.
Custom Leather interior
CUSTOM Yellow Gauge Faces
87 Formula TPI (5 Speed) Yellow/Gray STOCK
1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)
83 Camaro (Parts)
83 T/A (parts)
http://www.3rdgenformula.com
seriously, Because you are running at least 9.3:1 compression, you should run 92+octane. If you wanted to know... octane in gasoline does a few things, one, it allows the fuel to burn slower, and with higher octane it will also burn cooler.
Think about when you put cheep gas into an old car that does not have knock retard. It spark knocks like crazy. The reason is the fuel is exploding too early for the timing.
So to fix the problem you either use higher octane or a knock sensor that takes care of your knock problem.
Higher octane therefore will allow you to advance your timing slightly to help with added power.
Hope this helps...
------------------
87 Formula 5.1 converted to TPI Yellow/Black
SLP Dur 206/212, Lift 480/487, Cent Line 112 cam, SLP headers, SLP cat-back exhaust
K&N Airfilter
Modified Stock cold air intake
Ported & polished Stock TPI intake
Holley Adjustable Fuel Press regulator
AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit
Aluminum Driveshaft
3.73 Posi gear
Baer 12" brakes 4 wheels
KYB AGX Adjustable Shocks & struts
Hotchkis strut tower brace
South side machine frame connectors
Custom reinforced control arms and pan hard bar.
Custom Leather interior
CUSTOM Yellow Gauge Faces
87 Formula TPI (5 Speed) Yellow/Gray STOCK
1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)
83 Camaro (Parts)
83 T/A (parts)
http://www.3rdgenformula.com
06-21-2001, 07:22 PM
#4
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Location: Warsaw, Indiana
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Car: 1991 Firebird
Engine: 427 LSX
Transmission: Turbo 400
BTW, higher octane does not "allow the fuel to burn slower" Octane is the resistance to combustion and although higher octane gases do have a slightly increased burn time, that quote requires more careful analysis.
------------------
1991 Firebird
350 L98 (was a 305 TBI)
T-5 transmission
Edelbrock TES and cat back
Accel manifold
NOS
subframes
jegster torque arm
MSD Digital 6
AFPR
Lakewood lcas
Hurst linelock
SLP cam (206 212 .480 .486)
relocated battery
cold air
Hypertech chip
centerforce df clutch
poly bushings and mounts
AFR 190s
Harland sharp 1.5 rockers
a/f gauge
autopower rollbar
12.44 @ 114.63 juiced uncorrected
13.549 @ 102 non juiced uncorrected
------------------
1991 Firebird
350 L98 (was a 305 TBI)
T-5 transmission
Edelbrock TES and cat back
Accel manifold
NOS
subframes
jegster torque arm
MSD Digital 6
AFPR
Lakewood lcas
Hurst linelock
SLP cam (206 212 .480 .486)
relocated battery
cold air
Hypertech chip
centerforce df clutch
poly bushings and mounts
AFR 190s
Harland sharp 1.5 rockers
a/f gauge
autopower rollbar
12.44 @ 114.63 juiced uncorrected
13.549 @ 102 non juiced uncorrected
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