speedo reading MPH when in park???
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From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
speedo reading 60MPH when in park???!!!
88 iroc
carbed, ls1 dash, 97 camaro cluster
86 bird vss with the right gears
speedo reads perfect when in gear.
in park, or neutral, it reads 60mph when cold, then about 40mph when the car is warm.
any suggestions ?
thanks.
TJ
carbed, ls1 dash, 97 camaro cluster
86 bird vss with the right gears
speedo reads perfect when in gear.
in park, or neutral, it reads 60mph when cold, then about 40mph when the car is warm.
any suggestions ?
thanks.
TJ
Last edited by stage20; Feb 22, 2005 at 10:24 PM.
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If I am correct, there is a VSS buffer module or circuitry on the ThirdGen I/Ps. The '97 dash may have a higher impedance input and be detecting slight signal variations from the buffer circuitry that would normally be ignored by the older instruments. Short of watching the VSS output and speedo input with a scope while sitting idle, I don't have any suggestions. If you detect a bit of variation, you might try installing a medium resistance ¼W resistor across the speedo VSS input, about 2.7 or 3.9K as a start.
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