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Normal engine temp in SOHC 2.5L H4?


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11 replies to this topic

#1 friendly_jacek

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Posted 13 October 2005 - 04:37 PM

Does anyone with OBD2 scanner/interface or digital sensor can tell me their engine temp? Mine is 180F while driving on hwy (75MPH) and 187F or so idling during summer (AC off).
I am troubleshooting my poor MPG and exploring all possibilities (I covered all common things, you can search for my posts). Maybe the thermostat is set on a low-normal end and a 10F bump up would improve MPG?
Thanks!!!

#2 blitz

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Posted 13 October 2005 - 05:41 PM

The book lists the thermostat "starts to open" temp as 172*F and the fully-open temp as 196*F.

184*F falls right in the center, so I'd say your coolant temps look normal.

One thought would be to use the scanner to check for ignition retard while driving. If the timing is getting bumped back for any reason, that'll kill your fuel economy.

#3 nipper

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Posted 13 October 2005 - 06:20 PM

the scanner should be able to show you real time gas milage. Be interesting to see how it varies..



nipper

#4 nipper

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Posted 13 October 2005 - 06:20 PM

the scanner should be able to show you real time gas milage. Be interesting to see how it varies..



nipper

#5 nipper

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Posted 13 October 2005 - 06:20 PM

the scanner should be able to show you real time gas milage. Be interesting to see how it varies..



nipper

#6 mystro

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Posted 13 October 2005 - 11:01 PM

Does anyone with OBD2 scanner/interface or digital sensor can tell me their engine temp? Mine is 180F while driving on hwy (75MPH) and 187F or so idling during summer (AC off).
I am troubleshooting my poor MPG and exploring all possibilities (I covered all common things, you can search for my posts). Maybe the thermostat is set on a low-normal end and a 10F bump up would improve MPG?
Thanks!!!



What is your current MPG city and hiway (be truthful;)? 75mph will certainly
lower it compared to 60..that's a big given. My 03 2.5L get's approx 29mpg hiway at 62mph but still only 19mpg city,if I increase speed to 70 my mpg drops to 24.

#7 friendly_jacek

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Posted 14 October 2005 - 08:54 AM

The book lists the thermostat "starts to open" temp as 172*F and the fully-open temp as 196*F.

184*F falls right in the center, so I'd say your coolant temps look normal.

One thought would be to use the scanner to check for ignition retard while driving. If the timing is getting bumped back for any reason, that'll kill your fuel economy.


Thanks, timing advance seems OK: 15 degree on idle and 30-40 cruising.

#8 friendly_jacek

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Posted 14 October 2005 - 09:00 AM

What is your current MPG city and hiway (be truthful;)? 75mph will certainly
lower it compared to 60..that's a big given. My 03 2.5L get's approx 29mpg hiway at 62mph but still only 19mpg city,if I increase speed to 70 my mpg drops to 24.


Your post is very refreshing. People usually boast about record MPG but do not disclose how slow they go.
City: 16-18, Hwy 23-25 (70-75 MPG) or 20-22 (80-90 MPG).

#9 friendly_jacek

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Posted 14 October 2005 - 09:04 AM

the scanner should be able to show you real time gas milage. Be interesting to see how it varies..



nipper


The inteface I use does not report MPG, but it can be calculated from airflow and speed. The maker of the interface is revising the software for me to make the calculation in real time.

#10 nipper

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Posted 14 October 2005 - 01:07 PM

cool ...way cool

for the record my OBW gets 19-23 (im happy with it) around town ...havent done a highway run yet as i cant sit in the car more then an hour.


nipper

#11 blitz

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Posted 14 October 2005 - 04:50 PM

Your post is very refreshing. People usually boast about record MPG but do not disclose how slow they go.
City: 16-18, Hwy 23-25 (70-75 MPG) or 20-22 (80-90 MPG).

I gotta agree, your numbers seem kinda low.

With reasonable driving, my city mileage is 23 (summer) / 21 (winter).

If I hold to 70 mph, I'll return 27 mpg highway (A/C on 50% of the time).

What kind of tires are you running? When I switched off the original RE-92 for RE-950, my mileage dropped about 5%. Cornering improved 100%. :D

#12 friendly_jacek

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Posted 14 October 2005 - 05:27 PM

I gotta agree, your numbers seem kinda low.

With reasonable driving, my city mileage is 23 (summer) / 21 (winter).

If I hold to 70 mph, I'll return 27 mpg highway (A/C on 50% of the time).

What kind of tires are you running? When I switched off the original RE-92 for RE-950, my mileage dropped about 5%. Cornering improved 100%. :D


I also have RE-950. This could contribute to the problem since RE-92 are low rolling resistance rated (like most OEM tires) and RE-950 being high performance are not. However, I keep them inflated to 40 PSI that should more than compensate for the difference.




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