A YJ 5.3 build without a clever name - Page 28 - JeepForum.com
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post #406 of 2227 Old 05-03-2013, 07:55 AM
snail81
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Quote:
Originally Posted by Ripper3494

I sit at 40 all the time. I believe the vette and Yukon pumps are the same. It will fit with a little work. But yea when I step on the gas it's a little slow revving up and a lot of times it will cutout before redline. That being said it's still pretty quick lol

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Do you think some of it could be your tune?

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post #407 of 2227 Old 05-03-2013, 08:00 AM
Ripper3494
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Quote:
Originally Posted by snail81 View Post
Do you think some of it could be your tune?
I run a stock tune.

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build thread:
http://www.jeepforum.com/forum/f22/9...-spud-1218315/
1994 yj stretched, locked and loaded - 6.0l vortec lq4, 4l60e, np231, Dana 44s 37" interco trxus m/t, 3.5" bds front leafs, double triangulated 4 link rear on xj front coils.
1997 ZJ limited - BONE stock
2003 tj - 4in skyjacker, 33" mickey thompsons
my on board alternator/welder write up
http://www.jeepforum.com/forum/f12/a...te-up-1301614/
my tj 1/2 doors on a yj write up
http://www.jeepforum.com/forum/f12/t...ation-1417686/
RC vs BDS
http://www.jeepforum.com/forum/f12/r...s-bds-1461555/
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post #408 of 2227 Old 05-03-2013, 08:05 AM
snail81
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Not saying that it is the problem. But a performance tune ( a different timing curve, different rev limits) stuff like that might help
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post #409 of 2227 Old 05-03-2013, 08:31 AM
clintrivera
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LS engines need 55-60 PSI. 40 PSI is running lean, possibly lean enough to do engine damage, but certainly lean enough to make it run bad.

Thanks for the exhaust pictures, looks great.
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post #410 of 2227 Old 05-03-2013, 08:39 AM Thread Starter
Randonexplosion
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Quote:
Originally Posted by clintrivera View Post
LS engines need 55-60 PSI. 40 PSI is running lean, possibly lean enough to do engine damage, but certainly lean enough to make it run bad.

Thanks for the exhaust pictures, looks great.
No problem, and thanks. He did an awesome job on the custom Y pipe. Ill try to snag a closer pic of it.

Speaking of fuel, I grabbed a "vented" gas cap but I am still building quite a bit of pressure in the tank (a lot of pressure releases when I remove it). It is still starting fine though. Think it will cause any problems? Panda mentioned his friend's engine being damaged from it.
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post #411 of 2227 Old 05-03-2013, 09:12 AM
clintrivera
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Doesn't the yj tank have a vent line on it?
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post #412 of 2227 Old 05-03-2013, 09:15 AM Thread Starter
Randonexplosion
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Quote:
Originally Posted by clintrivera View Post
Doesn't the yj tank have a vent line on it?
It does. It ran from the charcoal canister to the tank, but since nothing was going to the canister I pulled it and plugged the vent line down by the tank to keep contaminants out. It is a tiny hose, do you think it would be ok to take the plug out and let it vent on its own?
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post #413 of 2227 Old 05-03-2013, 09:18 AM
Ripper3494
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Quote:
Originally Posted by Randonexplosion View Post
It does. It ran from the charcoal canister to the tank, but since nothing was going to the canister I pulled it and plugged the vent line down by the tank to keep contaminants out. It is a tiny hose, do you think it would be ok to take the plug out and let it vent on its own?
mine was like that since i got it. i never had an issue with it. now i have a fuel cell. and i hooked my breather up wrong and the tank pressurized when it got hot out and drained the entire thing onto the lawn... sucked but it was funny as hell. my jeep hates me so much that it siphoned itself

build thread:
http://www.jeepforum.com/forum/f22/9...-spud-1218315/
1994 yj stretched, locked and loaded - 6.0l vortec lq4, 4l60e, np231, Dana 44s 37" interco trxus m/t, 3.5" bds front leafs, double triangulated 4 link rear on xj front coils.
1997 ZJ limited - BONE stock
2003 tj - 4in skyjacker, 33" mickey thompsons
my on board alternator/welder write up
http://www.jeepforum.com/forum/f12/a...te-up-1301614/
my tj 1/2 doors on a yj write up
http://www.jeepforum.com/forum/f12/t...ation-1417686/
RC vs BDS
http://www.jeepforum.com/forum/f12/r...s-bds-1461555/
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post #414 of 2227 Old 05-03-2013, 09:19 AM
clintrivera
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Mine just goes up to my engine compartment. I'm going to put a little filter on it to keep crap out but I wouldn't plug it
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post #415 of 2227 Old 05-03-2013, 09:30 AM Thread Starter
Randonexplosion
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Quote:
Originally Posted by Ripper3494 View Post
mine was like that since i got it. i never had an issue with it. now i have a fuel cell. and i hooked my breather up wrong and the tank pressurized when it got hot out and drained the entire thing onto the lawn... sucked but it was funny as hell. my jeep hates me so much that it siphoned itself
How is the lawn?

Quote:
Originally Posted by clintrivera View Post
Mine just goes up to my engine compartment. I'm going to put a little filter on it to keep crap out but I wouldn't plug it
I was thinking the same thing, but just couldnt think if a filter that small. I guess I could be ghetto and use a little piece of cloth and a rubber band
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post #416 of 2227 Old 05-03-2013, 09:43 AM
Ripper3494
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Quote:
Originally Posted by Randonexplosion View Post
How is the lawn?



I was thinking the same thing, but just couldnt think if a filter that small. I guess I could be ghetto and use a little piece of cloth and a rubber band
Dead. Very dead

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build thread:
http://www.jeepforum.com/forum/f22/9...-spud-1218315/
1994 yj stretched, locked and loaded - 6.0l vortec lq4, 4l60e, np231, Dana 44s 37" interco trxus m/t, 3.5" bds front leafs, double triangulated 4 link rear on xj front coils.
1997 ZJ limited - BONE stock
2003 tj - 4in skyjacker, 33" mickey thompsons
my on board alternator/welder write up
http://www.jeepforum.com/forum/f12/a...te-up-1301614/
my tj 1/2 doors on a yj write up
http://www.jeepforum.com/forum/f12/t...ation-1417686/
RC vs BDS
http://www.jeepforum.com/forum/f12/r...s-bds-1461555/
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post #417 of 2227 Old 05-03-2013, 03:07 PM
theGiantPanda
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The fuel tanks need to breathe in and breathe out freely or you guys will have more stories to tell to add to the above mentioned ones. The thing with fuel tank vent lines is that if you don't run them though a charcoal canister you will occasionally smell gas when the tank breathes lol. The little filters on the end will keep some dust out depending on your location but won't "filter out" the gas smell.

As stated above, the motors both the "
LS and Hemi's, need every bit of a reliable 59 psi to run correctly. If you run on to low fuel pressure you will burn up your engine. Maybe not immediately but sooner or later it's gonna happen.

Randon did you remove the evap solenoid from the stick 5.3 set up? The evap stuff pulls vapor from the tank back into the intake manifold.... But your tank still needs a vent LOL

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Hospital? What, are you suffering from Overextended Jeepaphelia or something? :)
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post #418 of 2227 Old 05-03-2013, 03:09 PM
1slowhatch
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Quote:
Originally Posted by Randonexplosion View Post
Hopefully with a 300+ hp Jeep haha
Should be no problem with a 5.3!
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post #419 of 2227 Old 05-03-2013, 03:55 PM Thread Starter
Randonexplosion
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Jim, yes I did remove the Evap Purge from the Vortec. It was actually keeping me from closing the hood.
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post #420 of 2227 Old 05-03-2013, 03:57 PM Thread Starter
Randonexplosion
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Originally Posted by 1slowhatch View Post
Should be no problem with a 5.3!
I don't know what kind of power numbers I have. Wayne did say that he messed with the tune power wise but I don't think that he goes all out if you are running a stock tranny. At least he said something like that over on Pirate.

I just know that it squats like hell when I step on it
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