SanDiegoOverland
NAXJA Forum User
- Location
- San Diego
I have a 92 OBD-1. For giggles I tried the ignition switch diagnostic, after replacing my radiator, as I was seeing the engine running cooler than usual.
Sure enough, it threw this code:
17 - Engine stays cool too long
Symptoms:
-engine runs cool 150-175 or so
-heater blows mostly warm
-mpg have dropped to around 16-17 from 20-22mpg when I initially bought the jeep 6 months ago.
I've replaced these parts:
-Orig. radiator ruptured plastic tank - Installed alum core radiator, new coolant, upper and lower hoses. Problem solved.
-Engine cut out at highway speeds, as I lifted the throttle - Traced it to the TPS, and found dead spots with a multimeter. New TPS installed. Problem solved.
Thats it, other than tune up items that did not include the cooling systemcap, rotor, plugs, wires, fuel filter)
Would you say my error code has to do with the older/possibly original thermostat sticking open and keeping the engine in "cold start" mode? I've read that it can have a strong effect on mpg due to the "choke' staying open to help a perceived cold motor warm up.
Or possibly the alum core radiator cools THAT MUCH better and some how a lower temp thermostat had been installed by the P.O. to solve hot running issues?
thanks for any insight. I'll likely order a factory thermostat(I've heard aftermarket ones are junk) and gasket, anyways, just so I know that its good.
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Sure enough, it threw this code:
17 - Engine stays cool too long
Symptoms:
-engine runs cool 150-175 or so
-heater blows mostly warm
-mpg have dropped to around 16-17 from 20-22mpg when I initially bought the jeep 6 months ago.
I've replaced these parts:
-Orig. radiator ruptured plastic tank - Installed alum core radiator, new coolant, upper and lower hoses. Problem solved.
-Engine cut out at highway speeds, as I lifted the throttle - Traced it to the TPS, and found dead spots with a multimeter. New TPS installed. Problem solved.
Thats it, other than tune up items that did not include the cooling systemcap, rotor, plugs, wires, fuel filter)
Would you say my error code has to do with the older/possibly original thermostat sticking open and keeping the engine in "cold start" mode? I've read that it can have a strong effect on mpg due to the "choke' staying open to help a perceived cold motor warm up.
Or possibly the alum core radiator cools THAT MUCH better and some how a lower temp thermostat had been installed by the P.O. to solve hot running issues?
thanks for any insight. I'll likely order a factory thermostat(I've heard aftermarket ones are junk) and gasket, anyways, just so I know that its good.
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