# Chevy S-10 Innacurate Guages After Engine Replacement **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [December 19, 2015, 7:42pm UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008 "2015-12-19T19:42:09Z")\ **Posts on this page:** 9\ **Page:** 2
**Author:** ![ChrisTruck](https://avatars.discourse-cdn.com/v4/letter/c/aeb1de/32.png) [@ChrisTruck](https://community.cartalk.com/u/ChrisTruck)\ **Post date:** [December 30, 2015, 5:46am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/21 "2015-12-30T05:46:03Z")
I’ve changed the thermostat before so I knew what temperature it was supposed to be at. I also had a mouse nest in the heater core box which smelled awful. (It was parked for almost a year because I couldn’t get the engine running). So I had to take the dashboard out and clean all the vents. But yeah, the heat works great now. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [December 30, 2015, 5:58am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/22 "2015-12-30T05:58:31Z")
@ChrisTruck you sure are persistent Please let us know when you get the speedometer sorted out ---
**Author:** ![ChrisTruck](https://avatars.discourse-cdn.com/v4/letter/c/aeb1de/32.png) [@ChrisTruck](https://community.cartalk.com/u/ChrisTruck)\ **Post date:** [January 17, 2016, 4:45am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/23 "2016-01-17T04:45:13Z")
Finally got the speedo working today. I changed the speed sensor and made no difference. I couldn’t see any obvious wiring damaged. So I tried putting the original computer back in and the gauge goes right back to normal. I am so glad I asked for the original computer back. The guy had swapped it with a used one when I was trying to get the engine fixed. Thanks for the responses, I’m still fixing up some things so I’ll probably be back with more questions. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [January 17, 2016, 5:25am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/24 "2016-01-17T05:25:07Z")
@ChrisTruck You are extremely persistent, and that is a good thing Congratulations on a job well done! You probably saved yourself a bundle, as a new/remanned computer would probably have to be set up and programmed for your particular vehicle. Not sure if that is the case here, but it typically is ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [January 17, 2016, 6:47am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/25 "2016-01-17T06:47:50Z")
Me thinks there should be some kind of merit badge for Mr. Chris ---
**Author:** ![ChrisTruck](https://avatars.discourse-cdn.com/v4/letter/c/aeb1de/32.png) [@ChrisTruck](https://community.cartalk.com/u/ChrisTruck)\ **Post date:** [January 17, 2016, 7:28am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/26 "2016-01-17T07:28:06Z")
I was kinda leery when he swapped the computer, there’s many variations of S-10. The computer looks the same but it must be programmed for a different S-10 model. Saved me a lot of grief and money keeping the original. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [January 17, 2016, 7:44am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/27 "2016-01-17T07:44:56Z")
@ChrisTruck You said the engine was from a Silverado, not an S10 . . . maybe the computer was for a 4.3 V6, but in a Silverado ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [January 17, 2016, 7:59am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/28 "2016-01-17T07:59:07Z")
Your mechanic should have set the speedometer factor in the computer when he installed it. If he didn’t have a scan tool to do so it should be a 1/2 hour labor fee at a dealer. ---
**Author:** ![ChrisTruck](https://avatars.discourse-cdn.com/v4/letter/c/aeb1de/32.png) [@ChrisTruck](https://community.cartalk.com/u/ChrisTruck)\ **Post date:** [January 17, 2016, 8:19am UTC](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008/29 "2016-01-17T08:19:26Z")
The computer was swapped before the new engine, I don’t know what it came from. A different mechanic put the new engine in. I didn’t drive it after the computer swap. All I know is it works now. [Previous page](https://community.cartalk.com/t/chevy-s-10-innacurate-guages-after-engine-replacement/92008.md?page=1)