# Engine load? **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, tracker\ **Created:** [January 29, 2011, 12:16am UTC](https://community.cartalk.com/t/engine-load/60583 "2011-01-29T00:16:09Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![jimsims](https://avatars.discourse-cdn.com/v4/letter/j/ecccb3/32.png) [@jimsims](https://community.cartalk.com/u/jimsims)\ **Post date:** [January 29, 2011, 12:16am UTC](https://community.cartalk.com/t/engine-load/60583/1 "2011-01-29T00:16:09Z")
I have a 98 Chevy Tracker 1.6 auto. My OBD reader shows engine load @ 25% in park at idle. Anyone have an idea what would cause this. ---
**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\ **Post date:** [January 29, 2011, 12:20am UTC](https://community.cartalk.com/t/engine-load/60583/2 "2011-01-29T00:20:39Z")
Read and enjoy. [http://forums.trailvoy.com/archive/index.php/t-67697.html](http://forums.trailvoy.com/archive/index.php/t-67697.html) ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [January 29, 2011, 2:38am UTC](https://community.cartalk.com/t/engine-load/60583/3 "2011-01-29T02:38:03Z")
The link was OK in regrads to explaining fuel trim and 02 sensor swing but I never made a connection to either your reported 25% load or the other OP’s reported 25% load. For me I would need a definition in “OBDII speak” just what is ment when “engine load” is referenced. It certainly can’t mean a load like what would be put on an engine during a horsepower rating test. I do wonder what context to view the statement “25% engine load”. Both short term and long term fuel trim figures are neat to look at to gain an understanding on theory of operation of a fuel management system but they really have not been my main diagnostic tool, but then drivability was something I did when other work was not available or I was forced to (as in when a used car I was getting ready for sale would not pass emissions. Perhaps short term and long term fuel trim codes come become more useful when you are going after a difficult to diagnois drivability problem or perhaps when a customer reports an unexplained mileage drop and really wants to investigate the cause. The site referenced is one I have seen people turned away from when they post in the format that we get here (uninteligible). ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [January 29, 2011, 3:39am UTC](https://community.cartalk.com/t/engine-load/60583/4 "2011-01-29T03:39:08Z")
Well let’s see? It’s four cylinder engine. At idle it’s operating the oil pump, the water pump, all the drive belts, and the torque converter. 25% load at idle is about right for that small of an engine. Have you tried reving the engine up to see what the reading is? Tester ---
**Author:** ![B.L.E](https://avatars.discourse-cdn.com/v4/letter/b/848f3c/32.png) [@B.L.E](https://community.cartalk.com/u/B.L.E)\ **Post date:** [January 29, 2011, 1:40pm UTC](https://community.cartalk.com/t/engine-load/60583/5 "2011-01-29T13:40:12Z")
I suspect that it means that the air pressure in the intake manifold is 25% of the atmospheric pressure when the engine is idling. ---
**Author:** ![dagosa](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/dagosa/32/9837_2.png) [@dagosa](https://community.cartalk.com/u/dagosa)\ **Post date:** [January 29, 2011, 1:46pm UTC](https://community.cartalk.com/t/engine-load/60583/6 "2011-01-29T13:46:30Z")
I had this motor in my sidekick…and I agree, it’s normal as it’s a weak motor and doesn’t take much at idle. It needs lots of revs.