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Unread 09-02-2014, 12:57 AM   #46
mike134
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1989 YJ Wrangler 
 
Join Date: Aug 2014
Location: Cleveland, OH
Posts: 508
I suppose autozones don't typically have exhaust gas analyzers in their lending pool?

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Unread 09-02-2014, 02:19 AM   #47
jsd1991yj
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1991 YJ Wrangler 
 
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Not that I have found. I wish it was on the rent-a-tool program. lol. Complete with professional technichian.
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Unread 09-02-2014, 03:46 AM   #48
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit, Michigan
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You brought the pressure down For idle what's the pressure with the vacuum pulled?
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Unread 09-02-2014, 04:09 AM   #49
mike134
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1989 YJ Wrangler 
 
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yeah, get that reading for Que, but also check for a leak in the FPR vacuum line again. I'd imagine that there has to be a vacuum leak there.

If you can't find the leak, go borrow the vacuum gauge from your friends at autozone
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Unread 09-02-2014, 05:16 AM   #50
jsd1991yj
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When I pull the vacuum line to the fpr it raises the fuel pressure by about 5-6 lbs instantly.
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Unread 09-02-2014, 07:52 AM   #51
Que89YJ
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1989 YJ Wrangler 
 
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If it goes up to 39/40 psi then I am really suspicious that your vacuum line isn't giving it enough vacuum.
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Unread 09-02-2014, 05:41 PM   #52
jsd1991yj
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1991 YJ Wrangler 
 
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Location: hesperia, ca
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Do you have any photos of where the vacuum line is supposed to be routed? More specifically the fuel pressure regulator vacuum line and the map sensor vacuum line. I have a feeling I may have a vacuum line in the wrong place on the intake manifold.
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Unread 09-02-2014, 09:04 PM   #53
Que89YJ
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1989 YJ Wrangler 
 
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I can dig one up.
Try using this and look for images on the search
http://www.jeepforum.com/forum/f12/f...oogle-1003734/
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Unread 09-03-2014, 09:12 AM   #54
jsd1991yj
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Thank you Que. I will look into it.
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Unread 09-14-2014, 02:12 AM   #55
jsd1991yj
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1991 YJ Wrangler 
 
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So I re-checked my vacuum line for the FPR and it turns out I had a T with another vacuum line for my evap canister release valve. I think the T connector was leaking because I took that out and ran just the FPR line to the manifold and my fuel pressure dropped to 30-31 psi at idle. When I remove the vacuum line it goes straight to 38-39 psi.

I changed my plugs to champion copper plugs. All of my previous plugs were fouled and almost completely black at the electrodes. I also replaced my O2 sensor and found it had some dark coloring to it on the side facing the manifold. I guess I have been running really rich for quite a while and just never realized it.

I did pass smog this time around so that was great. Here are the new numbers. CO2 14.5 / 14.6, O2 .4 / .2, HC 89 / 42, CO .27 / .18, NO 555 / 545
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Unread 09-14-2014, 09:36 AM   #56
mike134
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Congratulations on running and awesome vehicle AND not shooting smog everywhere!
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Unread 09-14-2014, 09:47 AM   #57
Que89YJ
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1989 YJ Wrangler 
 
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Thanks for posting the fix. now you can give the carb jeep wave!
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