LS engine swap info

[68GMCCustom]

if thats what you want........ why pay when you can gut them?

[kSStamp0182]

Originally Posted by 68GMCCustom

if thats what you want........ why pay when you can gut them?

because LS cats are worth nearly double what them cost.

[Shon]

is that for visual inspection!?!? why would these old trucks go thru a visual inpsection? sorry, in SC we do not have inspections right now...

[kSStamp0182]

Originally Posted by Shon

is that for visual inspection!?!? why would these old trucks go thru a visual inpsection? sorry, in SC we do not have inspections right now...

yes, its hit and miss around here (ETX), some places dont, some do depending on where you go but it is getting worse and worse. 24+ year old vehicles do not have to undergo the sniffer, but a "visual exhaust/emission equipment" inspection for anything newer than 1968.

[Shon]

Originally Posted by kSStamp0182

yes, its hit and miss around here (ETX), some places dont, some do depending on where you go but it is getting worse and worse. 24+ year old vehicles do not have to undergo the sniffer, but a "visual exhaust/emission equipment" inspection for anything newer than 1968.

Did some '68s come with cats???

[kSStamp0182]

Originally Posted by Shon

Did some '68s come with cats???

actually maybe it was 1975. somewhere in that time frame, i dont know when they started installing them.

[Hart_Rod]

Originally Posted by kSStamp0182

because LS cats are worth nearly double what them cost.

I've got a set of LS Cats if someone is interested.

[sdwolff98]

1973-1974 was when they started installing cats on vehicles right during the gas crunch era. In texas and I got this from the DMV if it was not installed as a factory item it does not need to be present on the vehicle at the time of inspection. So if it is 78 for sure or newer at least one set of cats has to be in place on the vehicle. Went through this with the inspections station on my pontiac firebird. They did check to make sure that all required vacum lines were in place on the engine. What few there were lol. Working on getting that car back through inspection for the year having some brake issues that are holding me back atm. Sean

[68GMCCustom]

wasn't it the 1975 models? At least for GM?

[low_84_inchaska]

what about throttle cable setups.....1999 5.3 in 84 shorty??

[sdwolff98]

68 custom,
You might be right IO know it was within that times range.

Cable setups for a 5.3 you will probably need an 04 or earlier engine unless you want to piece it together I know lokar and a couple of other companies make cable setups for that and ls series engines. I have one for an unused tpi conversion atm. Let me look around I might have the ls lokar setup laying around somewhere.

Sean

[low_84_inchaska]

yeah my motor is a 99

[thor]

After checking out the above mentioned straight pipe that looks like a catalytic converter, I read the disclaimer at the bottom. Hilarious!

"The product description above is for entertainment purposes only. This product does not perform the exhaust cleansing function of a catalytic converter in any way. Use of this product on or off the road violates countless laws and may prevent your car from passing emissions. It is unlawful to install this product in any vehicle in the United States, ever. If you wish to return this product at any time in the future, a full refund will be issued. This product should only be purchased by lawyers with pre-1975 vehicles or purpose built off-road vehicles that did not come with catalytic converters from the factory who know for a fact that it is legal to use in their vehicle in their jurisdiction for aesthetic reasons only. If you are not one of those lawyers, this product should only be hung on your wall to express your rebellious nature, never installed in a vehicle. This product may cause cancer."

[1sik7t2]

Hey thealien, thanks for helping out here....i'm havin a problem with my lq4 motor it has the single fuel rail system u speak of (2005) from a gmc savannah went to napa, thought the oem fuel filter would have a return, but it's just 1 in 1out so now i'm so confused...it wont start unless you are spraying starter fluid in the intake -----& i dont have the mass air hooked up any help would be very appreciated thx dave





=Thealien;3686299]Fuel system (any chance a mod can move this post up?)
The LS engines require 58-60 pounds pressure at the fuel rails. Older fuel rails had a regulator on the rails and there is a feed and return on these engines. On the later fuel rails there is only the feed on the rail. You need to have something like the filter regulator shown below to return the excess fuel to the tank. Some of the tanks these engines came with did this internally in the tank.

Corvette filter/regulator

I don't know how long this will last but a decent deal on the regulator/filter and he will take offers for less I am told

GF822
Lots of people use Walbro external pumps

Walbro external pumps and fittings
Dorman quick disconnects for GM fuel line

Dorman 5/16ths

Dorman 3/8ths
Russel AN quick disconnects

Russel 3/8ths

Russel 5/16ths
Don't have a way to make the GM quick disconnect? Try one of these

Dorman flare to quick disconnect
Fuel pump tank adapter

F-body LS1 fuel pump adapter kit
here is an installation tutorial of the adapter kit

Tutorial of adapter kit
Another gas tank modification

EFI pump tank mod
Dual tank info

Compliments of Glock35ipsc[/QUOTE]

[1sik7t2]

yes yes i can use your help big time i'm reachin out to anybody i'm puttin n a 6.0 2005 lq4 in my 72 burb has the single in fuel rail no return i'm told on here somewhere i need a fuel filter with a return built in so hit napa and the oem is only 1 in 1 out,,,? it won't start unless sprayin starter fluid in the intake i dint have the throttle canle of mass air flow hooked up yet either...just tryin to start it first....do i need the others first??? the smell of gas in my garage is soooo overpowering like its tryin to run on only gas....Please help thX Dave

Originally Posted by Super73

If there are any direct questions that i can help with, please let me know. I've been dealing with LS1's since 2001 and as well as being a moderator here, I am a moderator on LS1tech.com and Performancetrucks.net

[kSStamp0182]

Originally Posted by 1sik7t2

yes yes i can use your help big time i'm reachin out to anybody i'm puttin n a 6.0 2005 lq4 in my 72 burb has the single in fuel rail no return i'm told on here somewhere i need a fuel filter with a return built in so hit napa and the oem is only 1 in 1 out,,,? it won't start unless sprayin starter fluid in the intake i dint have the throttle canle of mass air flow hooked up yet either...just tryin to start it first....do i need the others first??? the smell of gas in my garage is soooo overpowering like its tryin to run on only gas....Please help thX Dave

the part you are looking for is GM part # 19239926

[1sik7t2]

still confused! what part number is this for? fuel filter? & y is the stock filter only no return, and 1 more do i need return....im not really an engine guy so help explain please something doesnt make sense in my pee brain

[sdwolff98]

That part number I am guessing is the filter with return line attachment to work with your engine. The return line routes fuel back to the gas tank when the fuel injection rails have reached full pressure. Helps to save the fuel pump from too high of pressures. And other things as well. Not a boned up on these items yet working on it quickly tho since I will be buying my new gas tank this fall and installing it after the bed is completely repainted with new oak wood. late 2004 and early 2005 they simplfied the fuel rails due one part problems with the regulators plus high pressure requirements. So what you probably grabbed a hold of was one of the early 2004 models that still had the rail regulator in place rather than the newer filter regulator assembly.

Sean

[1sik7t2]

sdwolff98 so to clarify...i need that filter with the in/out and return to the gas tank?? if so, then ok but i dont understand why my set up is just like the van it came out of single line fuel rail(inlet) single in and out filter no return

[kSStamp0182]

Originally Posted by 1sik7t2

sdwolff98 so to clarify...i need that filter with the in/out and return to the gas tank?? if so, then ok but i dont understand why my set up is just like the van it came out of single line fuel rail(inlet) single in and out filter no return

you never know they coulda had a wrong part # at the store. it would def have a return somewhere tho.

but yes you need that.

[sdwolff98]

Yeah you need the filter with the return line like i said it was early or mid 2004 they changed the filters to the new ones. So yes definitely need it. It is one of the parts I am working on getting later this year when my fuell system goes in and online in my truck
Ksstamp is doubtlessly right in it being the wrong part they gave you. I have had that happen more than once at oreilly's myself on something I am working on. Let me see ifn I can find the link to the part you need so you can show them a picture of what you need should fix the problem.

here is the link this one has been modified but it is identical to what you jneed they just fancied this one up with an fittings.

http://www.speedinc.com/cont.cfm?cid=C0000896

take that to your parts house and they should be able to find the right one for you.
Sean

[1sik7t2]

thanks for all the help boys....once i saw a picture of the filter, i remembered that i had something simular in a box somewhere (a member on this site that WAS helping me and disappeared,told me to get it) i found it,installed it,waaaaa llaaaaaa still no go...got pressure at the fuel rails but it just turns over, even the mass air is hooked up NOW WHAT?????

[sdwolff98]

ok here is where to start have you checked to make sure your fuel injectors are getting power? if they are y our next step would be to make sure the computer is working properly in driving the injectors next. Easiest power check on injectors is use a volt meter and see if there is any ppower at each injector unit. What kind of wiring harness are you using? Also are all of your sensorsd hooked up on this engine?


Sean

[sdwolff98]

I was reading your other posts on the engine. you say you smell strong odors of fuel? is that when you are trying to start the engine? if so have you tried to find out where it is coming from at all? if it is leaking from the rail or injectors might also explain the no start issue as well.

sean
Posted via Mobile Device

[1sik7t2]

Wolff, not leaking fuel anywhere checked everywhere, nothing the smell is mostly after i've tryed to start it....i checked my oil, doesnt seem like gas but i have extra oil now....so i think gas is just passing by the injectors gonna drain oil, put in new...my friend has the "noids" to check the injecters, try that tonight and oil pressure is still a big question mark....at the sharder valve, it seems pretty good visually...& the wire harness is the stock on outta the van, with improvements thx in advance