| Author | Message | ||
| Lloyd (Lloyd)
Junior Member Username: Lloyd Post Number: 97 Registered: 8-2001 |
If there has been a lot of rain and associated humidity, I would also check connections for thermocouples,temperature sensors on top of engine and other ignition connections. In my 512TR I had similar experience, but it was associated with slightly rough idle once warmed up. In my case the connection with the temperature sensor had condensation or some other conection issue which caused the car temperature sensor not to register increased temperature on warm up and engine management system thought engine was still cold which led to extra fuel igniting in exhaust setting off slow down light. Although since you did not indicate an idle issue and you stated car was not even hot, it sounds like you may have another issue. | ||
| James Selevan (Jselevan)
Member Username: Jselevan Post Number: 588 Registered: 6-2002 |
Steve M. is right on. In the absence of a mis-firing bank of cylinders, the cat will not overheat. Look down the aft end of the car, and you will see two wire-braided cables coming off of the cats. Follow these to the plate above the right rear wheel well. Remove the plate (3 or 4 10mm nuts), and you will see the ECU sending units. Two wires to each unit. Swap the units (swap the wires) and check to see which light comes on the dash. Then follow Steve M.'s instructions. Jim S. | ||
| Steve Magnusson (91tr)
Intermediate Member Username: 91tr Post Number: 1872 Registered: 1-2001 |
Bruce -- If you've confirmed it's a false situation (i.e., the cat/exhaust/thermocouple is not near-glowing red hot), swap the thermocouple electrical inputs to the warning light ECUs (it's helpful to label everything with some "1/6" and "7/12" tags before unplugging anything to not confuse things): 1. if the 7/12 dash light still comes on erroneously, it's probably a bad 7/12 ECU. 2. if the 1/6 warning light now comes on erroneously, you'll have to dig deeper. Just a suggestion for a first (reasonably simple IMO) test... | ||
| Mark Collins (Markcollins)
Member Username: Markcollins Post Number: 257 Registered: 7-2002 |
John Bruce has special dispensation for use of the Caps key  Bruce on the 355's this problem would show when the Cat ECU got moisture into it, mainly caused by a crack in the sealant | ||
| John_Miles (John_miles)
Junior Member Username: John_miles Post Number: 89 Registered: 7-2001 |
Sounds like a stuck caps-lock key to me. Try some WD-40? | ||
| Bruce Wellington (Bws88tr)
Intermediate Member Username: Bws88tr Post Number: 2012 Registered: 4-2002 |
FIRST TIME IN 3 WEEKS TO DRIVE THE TR HERE IN NJ, (NO RAIN TODAY) WARMED IT UP FOR 4 MINS, CATS NOT HOT, BACKED IT OUT OF MY GARAGE, AND THEN THE FAMOUS 7-12 CYLINDER IDIOT SLOW DOWN LIGHT GOES ON, WITH THE RINGING.. ANY HELP?? THE CAR WASNT EVEN HOT?? THANKS ALL.. BRUCE |