p1258 code after ls1 swap
p1258 code after ls1 swap
a real general description is "engine coolant temp high-fuel disabled"
i have no clue? the car will run and idle fine, but wont rev at all.
could it be just a shorted wire or a bad sensor. the scan tool just says 280* all the time, and the guage is pegged, even when you first start the engine.
anybody have any ideas where to start? to me it seams like a shorted sensor
i have no clue? the car will run and idle fine, but wont rev at all.
could it be just a shorted wire or a bad sensor. the scan tool just says 280* all the time, and the guage is pegged, even when you first start the engine.
anybody have any ideas where to start? to me it seams like a shorted sensor
Supreme Member
Joined: Jul 1999
Posts: 2,767
Likes: 2
From: Vereinigten Staaten
Car: Take
Engine: Your
Transmission: Pick
High temperature indicates a short to ground. Either the sensor is bad or the wire is pinched/rubbed through somewhere. You mentioned that the ECM not only reads high, but the sensor is pegged. How do you have them wired up????? Are you using the '98s 3-wire sensor????
i believe its a two wire sensor. its stock for the 99 f-body
i didnt really change any wires around, just plugged in and went since im using a complete 4th gen harness, gauges, etc....
i will be looking at it tomorrow to figure it out, maybe its as simple as a bad sensor i hope
i didnt really change any wires around, just plugged in and went since im using a complete 4th gen harness, gauges, etc....
i will be looking at it tomorrow to figure it out, maybe its as simple as a bad sensor i hope
Supreme Member
Joined: Jul 1999
Posts: 2,767
Likes: 2
From: Vereinigten Staaten
Car: Take
Engine: Your
Transmission: Pick
Unplug the coolant sensor and see if the computer reads -40°
If its does read that, then the wiring and computer are probably working and the sensor may be bad. If it still reads over 280, then you probably have a wiring or computer issue.
If its does read that, then the wiring and computer are probably working and the sensor may be bad. If it still reads over 280, then you probably have a wiring or computer issue.
Senior Member
Joined: May 2003
Posts: 987
Likes: 0
From: Houston-katy
Car: 1986 Irocz- Houstons Fastest Street
Engine: 408 LS1 w/ 2 stage
Transmission: Turbo 350
Axle/Gears: 3:73,3850 lbs , best of 9.92 @ 138
i had a software issue in the ecm that gave me that code. after fighting it for a few days went and got a new ecm and problem solved. hope it isnt whats wrong here
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smokingss
LSX and LTX Parts
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Mar 3, 2016 07:40 PM




thanks 
