A Cars forum. AutoBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AutoBanter forum » Auto makers » Jeep
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

89 YJ failed smog!



 
 
Thread Tools Display Modes
  #1  
Old September 2nd 06, 01:15 AM posted to rec.autos.makers.jeep+willys
Stevil
external usenet poster
 
Posts: 3
Default 89 YJ failed smog!

Hello All,

My 89 4.2L YJ just failed its smog on HC, results as follows...

15mph MAX 124 AVG 34 MEASURE 125
25mph MAX 104 AVG 23 MEASURE 104

As you can see it was a real close one, it was well below average on CO
and NO.

I should have put two and two together as I noticed the other day some
soot build-up on the tail pipe. SO my question is beyond changing the
PCV valve, an oil change, and high octane gas, is there anything else I
can do? I changed the PCV valve, distributor cap, rotor and ignition
wires three months ago, do you think changing the sparks would help
any?

Thank you in advance for your time and consideration of this matter and
your replies.

Cheers, kind regards,
Steve

Ads
  #2  
Old September 2nd 06, 01:55 AM posted to rec.autos.makers.jeep+willys
billy ray
external usenet poster
 
Posts: 987
Default 89 YJ failed smog!

Steve,

High octane gas burns slower and colder than the gasoline you are supposed
to be using therefore creating more pollution (especially hydrocarbons).

Make sure you run the vehicle hard before the test so the engine is fully
heated up.

It probably wouldn't hurt to run a can of Techron, BG44, SeaFoam, or
Berrymans into that tank of high-test you have there, just make sure you run
that tank as close to empty as you dare before refilling it with regular.

You may want to get a can of GumOut Jet Spray and give the carb a thorough
cleaning.

New sparkplugs are probably not necessary but it wouldn't hurt to pull them
and give then a good look to see it there is any indication of a misfire.

Let us know..


"Stevil" > wrote in message
ups.com...
> Hello All,
>
> My 89 4.2L YJ just failed its smog on HC, results as follows...
>
> 15mph MAX 124 AVG 34 MEASURE 125
> 25mph MAX 104 AVG 23 MEASURE 104
>
> As you can see it was a real close one, it was well below average on CO
> and NO.
>
> I should have put two and two together as I noticed the other day some
> soot build-up on the tail pipe. SO my question is beyond changing the
> PCV valve, an oil change, and high octane gas, is there anything else I
> can do? I changed the PCV valve, distributor cap, rotor and ignition
> wires three months ago, do you think changing the sparks would help
> any?
>
> Thank you in advance for your time and consideration of this matter and
> your replies.
>
> Cheers, kind regards,
> Steve
>



  #3  
Old September 2nd 06, 04:59 AM posted to rec.autos.makers.jeep+willys
Carl[_3_]
external usenet poster
 
Posts: 400
Default 89 YJ failed smog!

I failed emissions in my Toyota recently. I got a bottle of "Garunteed to
pass" emissions formula. I added it with a full tank of gas and ran in
nearly empty, then I added another bottle and went for a 20 mile hard drive
before going directly to the emissions station.

Passed with flying colors.

HTH

Carl



"Stevil" > wrote in message
ups.com...
> Hello All,
>
> My 89 4.2L YJ just failed its smog on HC, results as follows...
>
> 15mph MAX 124 AVG 34 MEASURE 125
> 25mph MAX 104 AVG 23 MEASURE 104
>
> As you can see it was a real close one, it was well below average on CO
> and NO.
>
> I should have put two and two together as I noticed the other day some
> soot build-up on the tail pipe. SO my question is beyond changing the
> PCV valve, an oil change, and high octane gas, is there anything else I
> can do? I changed the PCV valve, distributor cap, rotor and ignition
> wires three months ago, do you think changing the sparks would help
> any?
>
> Thank you in advance for your time and consideration of this matter and
> your replies.
>
> Cheers, kind regards,
> Steve
>



  #4  
Old September 2nd 06, 07:23 AM posted to rec.autos.makers.jeep+willys
bllsht[_1_]
external usenet poster
 
Posts: 21
Default 89 YJ failed smog!

In message . com>, "Stevil"
wrote:

>Hello All,
>
>My 89 4.2L YJ just failed its smog on HC, results as follows...
>
>15mph MAX 124 AVG 34 MEASURE 125
>25mph MAX 104 AVG 23 MEASURE 104
>
>As you can see it was a real close one, it was well below average on CO
>and NO.
>
>I should have put two and two together as I noticed the other day some
>soot build-up on the tail pipe. SO my question is beyond changing the
>PCV valve, an oil change, and high octane gas, is there anything else I
>can do? I changed the PCV valve, distributor cap, rotor and ignition
>wires three months ago, do you think changing the sparks would help
>any?
>
>Thank you in advance for your time and consideration of this matter and
>your replies.
>
>Cheers, kind regards,
>Steve


Some soot on the tail pipe is pretty much normal on a vehicle with a cat
converter. If there was a lot of it, that would indicate it's running rich, but
if your CO readings were low, it's not rich. High octane gas might help a
little with high NOx, but won't do a thing for HC.

HC is unburned fuel. Anything that can cause a misfire could cause this.
Ignition problems, or a lean mixture would be what I'd look for first. Make sure
the timing is where it belongs. Could also be a dead cat or air injection
system.

  #5  
Old September 2nd 06, 05:07 PM posted to rec.autos.makers.jeep+willys
Earle Horton[_1_]
external usenet poster
 
Posts: 222
Default 89 YJ failed smog!

"bllsht" > wrote in message
...
> In message . com>,

"Stevil"
> wrote:
>
> >Hello All,
> >
> >My 89 4.2L YJ just failed its smog on HC, results as follows...
> >
> >15mph MAX 124 AVG 34 MEASURE 125
> >25mph MAX 104 AVG 23 MEASURE 104
> >
> >As you can see it was a real close one, it was well below average on CO
> >and NO.
> >
> >I should have put two and two together as I noticed the other day some
> >soot build-up on the tail pipe. SO my question is beyond changing the
> >PCV valve, an oil change, and high octane gas, is there anything else I
> >can do? I changed the PCV valve, distributor cap, rotor and ignition
> >wires three months ago, do you think changing the sparks would help
> >any?
> >
> >Thank you in advance for your time and consideration of this matter and
> >your replies.
> >
> >Cheers, kind regards,
> >Steve

>
> Some soot on the tail pipe is pretty much normal on a vehicle with a cat
> converter. If there was a lot of it, that would indicate it's running
> rich, but if your CO readings were low, it's not rich. High octane gas
> might help a little with high NOx, but won't do a thing for HC.
>
> HC is unburned fuel. Anything that can cause a misfire could cause this.
> Ignition problems, or a lean mixture would be what I'd look for first.
> Make sure the timing is where it belongs. Could also be a dead cat
> or air injection system.
>

Along with the misfire idea, change the spark plugs. If the air injection
system is sub-standard, that would give you a point or two on the HC too.
On a vehicle this old, often the pump seizes up and someone puts plugs in
the holes for the AIR nozzles.

Earle



  #6  
Old September 5th 06, 03:04 PM posted to rec.autos.makers.jeep+willys
Mike Romain
external usenet poster
 
Posts: 3,760
Default 89 YJ failed smog!

A clean air filter does wonders for HC emissions, so does new plugs....

I would also recommend you check the new distributor cap and rotor out.
There are a bad batch of them out on store shelves. The rotors are too
short and start arcing out very soon after installing them.

High octane might help smooth things out if it sputters at idle. Your
engine calls for high test if running hot and loaded to avoid engine
ping.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Stevil wrote:
>
> Hello All,
>
> My 89 4.2L YJ just failed its smog on HC, results as follows...
>
> 15mph MAX 124 AVG 34 MEASURE 125
> 25mph MAX 104 AVG 23 MEASURE 104
>
> As you can see it was a real close one, it was well below average on CO
> and NO.
>
> I should have put two and two together as I noticed the other day some
> soot build-up on the tail pipe. SO my question is beyond changing the
> PCV valve, an oil change, and high octane gas, is there anything else I
> can do? I changed the PCV valve, distributor cap, rotor and ignition
> wires three months ago, do you think changing the sparks would help
> any?
>
> Thank you in advance for your time and consideration of this matter and
> your replies.
>
> Cheers, kind regards,
> Steve

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Darn! My '94 Del Sol failed the California Smog Check today DavidK Honda 16 February 3rd 06 02:39 AM
Failed Smog Check 1981 Trans AM TheSmogTech Technology 0 January 30th 05 04:16 PM
95 Camaro Failed Smog - cap & rotor location? Gary Skidmore Corvette 2 October 30th 04 02:50 PM


All times are GMT +1. The time now is 03:06 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2004-2018 AutoBanter.
The comments are property of their posters.