OK, now what? Temp BELOW 210.
CF Veteran
Joined: Aug 2010
Posts: 2,112
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From: Wantage, NJ
Year: 1995
Model: Cherokee
Engine: 4.0 I6
In the winter, an engine takes longer to reach operating temperature and cools off faster when shut off. Since the engine management system orders up a richer mixture when cold (proportionately more fuel in the air/fuel combination), more fuel is being burned overall.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
New radiator (leaked) upper hose (leaked) water pump (exploded) thermostat (process of over-heating elimination) new mechanical fan clutch (definitely not working - new one fixed the "airplane" shutting down sound also) and temperature sender (just because).
Now jeep stays well below 210, while running, idling, all the time. Is this an issue? If there's a previous thread for this, just send me there.
Thanks!
Now jeep stays well below 210, while running, idling, all the time. Is this an issue? If there's a previous thread for this, just send me there.
Thanks!
Registered Users
Joined: Sep 2009
Posts: 1,371
Likes: 4
From: morrisonville ny
Year: 2000 @ 1994 givin away
Model: Cherokee
Engine: 4.0
Yep, replaced the 195 with a 180 last January, it's been in ever since. When ambient temps are cool/cold, it'll run right at/very close to which ever the t-stat temp is (195 or 180). Not so in summer triple digits, XJ rad is too small........temps vary 180-230 and any where in between. Again, ScanGauge, not factory idiot gauge.
Registered Users
Joined: Sep 2009
Posts: 1,371
Likes: 4
From: morrisonville ny
Year: 2000 @ 1994 givin away
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
mine runs 150 to 170 all day long thats because i havent put a thermostat back in since trouble shooting last prob he put hiis in i think did not state what temp he put in though
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
True, but op is not talking about winter driving.
In the winter, an engine takes longer to reach operating temperature and cools off faster when shut off. Since the engine management system orders up a richer mixture when cold (proportionately more fuel in the air/fuel combination), more fuel is being burned overall.
In the winter, an engine takes longer to reach operating temperature and cools off faster when shut off. Since the engine management system orders up a richer mixture when cold (proportionately more fuel in the air/fuel combination), more fuel is being burned overall.
CF Veteran
Joined: Aug 2010
Posts: 2,112
Likes: 4
From: Wantage, NJ
Year: 1995
Model: Cherokee
Engine: 4.0 I6
Couldn't agree with u more. The only thing I disagree with is the statement "210 is peak performance operating temp" That's just where the factory has rigged the dash gauge to point, almost year round. In cold/cool/even moderate temps it won't reach 210, unless u have a 210 t-stat.
Are we at an agreement? lol
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
that is the optimum temp for all sensors to perform properly below that you computer think the motor is in need of more fuel like running with the choke on which equals bad gas mileage you will be running in open loop
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
Ok, we disagree, that's cool. I'm going by a digital scan tool that displays info from the ECU in 1 degree increments......not a dash gauge that has 3 numbers and some white marks.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
i believe its 190 to 210 is considered optimum temp for most computer controlled vechicles old school was the cooler you runthe better you run welcome to the computer world it sucks
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
.....and that is a myth, especially on OBD-II vehicles. Closed loop is entered shortly after start-up, when the heated O2 reaches operating temp and well before coolant temp reaches any where near normal.
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
Seasoned Member
Joined: Apr 2010
Posts: 440
Likes: 1
From: Bloomington, MN
Year: 1996
Model: Cherokee
Engine: 4.0 I6
Sorry to jack but I am having the same issue since I installed a new radiator a few months ago. This is where it normally runs now, and from what I have gathered from this discussion, it is fine? It runs a little lower coming down a hill or when the wind is cold(but I have ordered a grill cover for the winter)