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Old 08-19-2001, 06:10 PM   #1 (permalink)
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Post What Is This??? I broke something weird

Ok

Somone noticed something hanging from my rig today while we were wheeling. It looks like some sort of vent of some sort that broke off. Only problem is that i can figure out from where. The line attached to it go ot the vicinty of the gas tank and i can see much more unless i pull that tank. Anyone have ANY ideas?

I have an 89 YJ with the 2.5L if that helps!

Here are the pics! Thanks Alot



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Old 08-19-2001, 06:21 PM   #2 (permalink)
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it goes in the top of the gas tank, its the breather that goes to the charcoal canister for emissions crap i believe.
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Old 08-19-2001, 06:31 PM   #3 (permalink)
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HMMM

Maybe that is why my rig is running VERY rich!

Is this part important? If so, what is it called so i know what to look for at the dealer or parts store?

thanks a lot
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Old 08-19-2001, 06:37 PM   #4 (permalink)
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Looks like the vent in the top of the gas tank..Just snaps in the top..Should be two of them tied together with hose and than they go to emissions cannister. Have you had your tank out recently?? They just dont fall out! <IMG SRC="smilies/confused.gif" border="0">
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Old 08-19-2001, 06:40 PM   #5 (permalink)
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>>>>>Have you had your tank out recently?? They just dont fall out!

***** No, have never removed the tank. The top of it appears to be ripped and/or dry rotted.

Should i replace it? What should i ask for?

Would this cause my shitbox to run really rich?

thanks
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Old 08-19-2001, 07:01 PM   #6 (permalink)
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Vent related should not cause engine to run rich!
Where does the other end attatch to?
How do you know your engine is running rich??(black smoke or smell)
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Old 08-19-2001, 07:12 PM   #7 (permalink)
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>>>>>How do you know your engine is running rich??

***** Nasty smell, tail pipe is VERY black, idles rough and sometimes diesals when shuts off

thanks
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Old 08-19-2001, 07:28 PM   #8 (permalink)
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Difficult to say with F/I, could be anything,you should get a shop to hook up to your computer and check for codes. I don't think that that vent thingy could cause it. Do you have a "check engine" light on??
Did you try replacing your O2 sensor?
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Old 08-19-2001, 07:29 PM   #9 (permalink)
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you can just buy new vacum hose to replace the piece from the tank to the canister just take the old one out measure it and heat to any auto parts store and buy it by the foot or yard.
As far as running rich I would try the o2 sensor first
I have had the end of the probe burn off and tell the computor that it was running lean ( could not detect gas fumes in the exhaust) so it would richen the injection up till it was pumping black smoke out
Just my thoughts on the matter
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Old 08-19-2001, 07:31 PM   #10 (permalink)
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would a glogged muffler or cat cause it to run rich?

the O2 sensor is New and that didnt help it at all

I am thinking clogged exhaust, would that tell the computer to give it more fuel and then run rich?

thanks
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Old 08-19-2001, 07:39 PM   #11 (permalink)
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A plugged exhaust might tell the computer its too rich,than lean it out.
Hows your air intake?/ (clean air filter)
Do you know anyone with a temperature gun, point and shoot type (digital),just shoot in front of cat and behind cat for temp difference.
That could be why its dieseling!
Will the Jeep drive and if so how fast can it go?? (clogged exhaust will limit speed).
Hows your fuel pressure?? maybe too high
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Old 08-19-2001, 07:50 PM   #12 (permalink)
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Quote:
Originally posted by Boston Mangler:
<STRONG>would a glogged muffler or cat cause it to run rich?

the O2 sensor is New and that didnt help it at all

I am thinking clogged exhaust, would that tell the computer to give it more fuel and then run rich?

thanks</STRONG>
Clogged exhaust or cat will make it feel like a major power loss I mean major
I have never had one run rich from this thought
If I think of anything i will get back to ya
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Old 08-19-2001, 07:53 PM   #13 (permalink)
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>>>>>Hows your air intake?/ (clean air filter)
***** Just installed a nice and clean K&N Replacement

>>>>>Do you know anyone with a temperature gun, point and shoot type (digital),just shoot in front of cat and behind cat for temp difference.
***** Nope

>>>>>That could be why its dieseling!
***** The muffler was making sounds a few weeks back like it had marbles in it and then it went away! Weird Only diesals once in awhile and seems to have no rime or reason

>>>>>>Will the Jeep drive and if so how fast can it go?? (clogged exhaust will limit speed).
***** Well, its a 2.5L with 33's so it doesnt really go fast regardless but it seems very sluggish and if i am under 2700 rpms or so i get a nasty exhaust smell, if i downshift and get the RPMS up, it goes away (i assume this is because it is burning it)

>>>>>Hows your fuel pressure?? maybe too high
***** I assume ok
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Old 08-19-2001, 07:56 PM   #14 (permalink)
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Well if it is felling real sluggish I would tend to think maybe a clogged exhaust of some type
Can tou break it loose in front of the cat and see if it runs any better?
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Old 08-19-2001, 08:04 PM   #15 (permalink)
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Chris is right!
Cut it loose and let us know.
try it at the exhaust manifold, where the exhaust pipe hooks to it.
Good idea to rev engine b4 you unhook, to about 3000rpm. (feel the power)
Than after you cut it loose try it again to see if theres a difference, may need to drive it up the block.
Good luck, keep us posted
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Old 08-19-2001, 10:12 PM   #16 (permalink)
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Fuel injected motors have a number of sensors that could make it run rich
...if you want to find the answer to your Questions have it analyzed by a computer.....the tech should be able to pin point the problem...if you want to do it yourself I suggest a book by by jeff hartman put out by motorbooks international called "Fuel Injection"....>>>good luck

http://www.amazon.com/exec/obidos/AS...435323-5211836

[ 08-19-2001: Message edited by: BossGrip ]
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Old 08-19-2001, 10:36 PM   #17 (permalink)
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Quote:
Originally posted by Boston Mangler:
<STRONG>>>>>>Hows your fuel pressure?? maybe too high
***** I assume ok</STRONG>
Don't assume anything with EFI. Get a pressure gauge and test it and run the codes to see if the computer will tell you anything. Diagnostics with EFI and computers is really easy if you just follow the right procedures. Don't waste your time just guessing and assuming.
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Old 08-19-2001, 11:48 PM   #18 (permalink)
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As far as the vent I can order you one only if you don't call me untill wed. <IMG SRC="smilies/thefinger.gif" border="0"> Monday/tues. everyone calls. 800-504-Jeep
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Old 08-20-2001, 07:11 AM   #19 (permalink)
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ok

i have found where this WAS and it has appeared to have broken off, maybe when i installed my body lift awhile back (since removed) or maybe my tire ripped it off when it stuffed

either way, i found what it was and where it goes, NOW i have to try to find a new one.

hmmmm

what is the reall name for this thing?

thanks
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Old 08-20-2001, 06:23 PM   #20 (permalink)
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BM, I have that exact same thingy tucked away in the undercarriage, I don't remember when I first saw it but it fell out several months ago. I've been running without it since with no adverse effects at all. When it's time to pull the gas tank someday I'll replace it.

As for the other problem, yeah it could be exhaust. Checking the trouble codes for the FI system should be easy though, won't hurt to look. On alot of cars, all you really need is a jumper wire (or paper clip) and a an eye on the "Check engine light". Just learn how to read the codes and keep a code chart handy. HTH
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Old 08-20-2001, 06:25 PM   #21 (permalink)
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Thanks but i have an 89 and No Check Engine Light

thanks
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Old 08-20-2001, 06:39 PM   #22 (permalink)
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BM----Is it F/I???
Just a dumb question my 89 4.2l was carb!! <IMG SRC="smilies/confused.gif" border="0">
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Old 08-20-2001, 11:29 PM   #23 (permalink)
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>>>>>BM----Is it F/I???

***** Yes, it is an 89 with a 2.5L with the Throttle Body Injection. I believe ALL 2.5L's in YJ's were EFI

thanks
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Old 08-21-2001, 09:11 AM   #24 (permalink)
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Quote:
Originally posted by Bandit:
<STRONG>BM, I have that exact same thingy tucked away in the undercarriage, I don't remember when I first saw it but it fell out several months ago. I've been running without it since with no adverse effects at all. When it's time to pull the gas tank someday I'll replace it.

As for the other problem, yeah it could be exhaust. Checking the trouble codes for the FI system should be easy though, won't hurt to look. On alot of cars, all you really need is a jumper wire (or paper clip) and a an eye on the "Check engine light". Just learn how to read the codes and keep a code chart handy. HTH</STRONG>
You don’t need a paper clip in a jeep. It works of the ignition switch. It’s a series of off and on whit the key to the acc. It reads of the check engine light and you compare this to the codes, I have the codes but don’t have a scanner whit me right now or the book for that matter, and don’t remember the sequence for the switch. I can find out tomorrow when I go home. If you can’t get the right code you can go to a dealer and have them make you a copy of the codes. They will do it for free. I know of several people that have the cat removed and welded flanges on them front and back then they get some pipe at the local parts store and cut the pipe same length and same flanges, that way they can remove the cat and bolt on this pipe for more power. At the end of the year they bolt the cat back on get their decal go home and take it back out.
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Old 08-22-2001, 06:37 PM   #25 (permalink)
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When i had my 89 YJ 4.2L. The two peices goign into the tank like the one in the picture where roll over vents. That is what the dealer told me.

And i am interested in those codes and how to check them. I the a 93 EFI 4.0L now and it wants to stall when i brake hard or come to a stop. It will idle fine if i feather the gas until i am stopped
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