# Smog Test

**URL:** <https://community.cartalk.com/t/smog-test/3966>\
**Category:** Maintenance/Repairs\
**Created:** [September 1, 2007, 5:03am UTC](https://community.cartalk.com/t/smog-test/3966 "2007-09-01T05:03:03Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![smose2400](https://avatars.discourse-cdn.com/v4/letter/s/5e9695/32.png) [@smose2400](https://community.cartalk.com/u/smose2400)\
**Post date:** [September 1, 2007, 5:03am UTC](https://community.cartalk.com/t/smog-test/3966/1 "2007-09-01T05:03:03Z")

</div>

I purchased a 1987 Jaguar XJ6 VDP which had been driven little for about 10 years and was up on blocks ina garage for the last 6 years. Got it going with a tune-up, new spark plugs & wires, cap and rotor, fresh oil & filter, etc. I had a CA smog pretest today and it showed hydrocarbons at 140 (should be 120 or less) and carbon dioxide at 6.0 (should be 1.0 or less). Numbers provided by smog shop. I believe that this car can be manually adjusted. Please help me pass this test!  
  
  
  
 Thanks,  
  
  
  
 Scott  
  
 Fresno, CA

---

<div class="post-metadata">

**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\
**Post date:** [September 1, 2007, 5:23am UTC](https://community.cartalk.com/t/smog-test/3966/2 "2007-09-01T05:23:50Z")

</div>

I would say that if it can’t be adjusted, that you need a new catalytic converter. Oxygen sensor comes to mind also. I have no idea if old gasoline can have an effect. I don’t think so. The manual adjuster is on the back of the smog testing machine.

---

<div class="post-metadata">

**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:** [September 1, 2007, 7:39pm UTC](https://community.cartalk.com/t/smog-test/3966/3 "2007-09-01T19:39:48Z")

</div>

I believe this car has fuel injection. Then, the ECM is not getting the correct info, and running rich. My FIRST suggestion is get a new oxygen sensor. I’m hoping that a new air filter and PCV valve were already done.