LT1 to LS1 swap help
08-29-2008, 09:41 AM
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LT1 to LS1 swap help Need help on how to get the temp guage to work and also is it possible through HP Tuners to correct the tach out put signal to corret my tach reading due to the different signals from LT1 pcm and a LS1 pcm. Thanks guys
08-29-2008, 10:22 AM
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Ok I got a response and answer in Tuning forum but still need help on the temp guage. Apparently the lt1 has a 2 wire sensor and the ls1 has a 3. I can get either one but how do i get it wired to transfer the corrrect data to the pcm then to the guage. Thanks again
08-30-2008, 09:26 AM
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Sir I wish it was that easy. The ls1 pcm wont read the 2 wire lt1 sensor. And with the ls1 3 wire sensor still the guage from and lt1 cluster doesnt know how to convert the signal fromt he ls1 pcm to read correctly.
08-30-2008, 02:30 PM
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Ever thought about running a Autometer temp gauge?.... Guaranteed to be more accurate then the factory gauge. Im running one in mine with no issues, Just a thought.
08-30-2008, 03:08 PM
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08-30-2008, 11:28 PM
#8
Temp Sensor:
Get a 1998 F-body LS1 Temp Sensor(GM Part #12551708) and get a 3-Pin Connector identical to the one that is on the Throttle Position Sensor.
Wire in the bottom wires the same as the Connector that is currently in there..keep the 2 bottom wires on the sides that they are on, and then the third wire is the wire that goes to your Temp Gauge. I currently have mine setup like that, and I have no problems.
The reason you have to do this and the reason this works is cause the F-bodies that are 1998 and back use Analog Gauges, the 1999 and up use a BCM(Body Control Module) that sends one signal to the Gauges and it breaks it down digitally from there.
Get a 1998 F-body LS1 Temp Sensor(GM Part #12551708) and get a 3-Pin Connector identical to the one that is on the Throttle Position Sensor.
Wire in the bottom wires the same as the Connector that is currently in there..keep the 2 bottom wires on the sides that they are on, and then the third wire is the wire that goes to your Temp Gauge. I currently have mine setup like that, and I have no problems.
The reason you have to do this and the reason this works is cause the F-bodies that are 1998 and back use Analog Gauges, the 1999 and up use a BCM(Body Control Module) that sends one signal to the Gauges and it breaks it down digitally from there.
