# 93 S10 blazer with egr valve issues

**URL:** <https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286>\
**Category:** Maintenance/Repairs\
**Created:** [February 29, 2008, 9:50pm UTC](https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286 "2008-02-29T21:50:39Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![jed137](https://avatars.discourse-cdn.com/v4/letter/j/85f322/32.png) [@jed137](https://community.cartalk.com/u/jed137)\
**Post date:** [February 29, 2008, 9:50pm UTC](https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286/1 "2008-02-29T21:50:39Z")

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Hi all! I’m in a desperate state with this vehicle. I’ve put a new fuel pump in new gas lines. I’m getting fuel and spark.  
  
 I’ve cleaned the egr valve and it seems to be working freely. Drove great one day and the engine light has come on again and it’s beginning to run rough. The EGR is an electric kind–no diaphragm. Any help would be greatly appreciated! Thanks

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**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:** [February 29, 2008, 11:45pm UTC](https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286/2 "2008-02-29T23:45:32Z")

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Are you getting an EGR code?

Tester

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [March 1, 2008, 12:10pm UTC](https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286/3 "2008-03-01T12:10:09Z")

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Does it have a rough idle? If it does, unplug the electrical connector from the EGR control. If the idles smooths, this shows that the EGR valve is being turned on at idle.

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**Author:** ![willey](https://avatars.discourse-cdn.com/v4/letter/w/a9adbd/32.png) [@willey](https://community.cartalk.com/u/willey)\
**Post date:** [March 1, 2008, 1:32pm UTC](https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286/4 "2008-03-01T13:32:31Z")

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I really doubt the EGR is the problem. This is a 93, chances are the EGR passage is plugged so even if the EGR was coming on at idle it wouldn’t affect how the engine is running.

I would be looking at ignition components for a rough running problem. Plus the vehicle is pretty old, I would check compression as well,one cylinder with low compression could be the cause as well.

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**Author:** ![jed137](https://avatars.discourse-cdn.com/v4/letter/j/85f322/32.png) [@jed137](https://community.cartalk.com/u/jed137)\
**Post date:** [March 1, 2008, 2:49pm UTC](https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286/5 "2008-03-01T14:49:40Z")

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Thanks Tester, I’m gong to call Auto Zone or AA and see if they’ll put it on the computer for me. Hopefully I will see what’s going on. Appreciate you input!

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**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:** [March 1, 2008, 2:54pm UTC](https://community.cartalk.com/t/93-s10-blazer-with-egr-valve-issues/11286/6 "2008-03-01T14:54:54Z")

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You can pull the codes yourself.

Look under the dash below the steering column. There you’ll find the Assembly Line Data Link. Look close and you’ll see each pin on the ALDL has a letter. Jumper between the A & B terminals with a paper clip or a piece of wire. Turn the ignition switch to the run position and the Check Engine light will start flashing out the codes.

Tester