Re: LS engine swap info
 

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 :D
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

Re: LS engine swap info
 

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?????

Re: LS engine swap info
 

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

Re: LS engine swap info
 

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
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Re: LS engine swap info
 

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

Re: LS engine swap info
 

hmm strong smell of gas during starting attempts. starts with starter fluid. let me ask a mechanic friend of mine and see what he says to check next. hmmm interesting problem the vats disable I am guessing?

sean
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Re: LS engine swap info
 

Only thing i know of thats not hooked in the sensors on the exhaust

Re: LS engine swap info
 

sounds to me like it really isnt getting fuel, have you checked your fuel rail and make sure it isnt plugged? If the engine was out of the truck/van for any length of time, it could have gotten gummed up.

Re: LS engine swap info
 

I've cleaned the rails a couple of times...we were wondering the same thing....after tryin to start it, there is fuel on both rails and pressure at the shrader valve turns over, runs with starter fluid, but not on its own...no throttle hooked up but shouldnt need that yet anyway

Re: LS engine swap info
 

I may have missed it......but where the injectors cleaned?

Re: LS engine swap info
 

uuuummm cleaned, no blew them out with air, wiped off, rails blown out, what and how should i clean them??? thx p.s. i can see both tiny holes on the end, matters???

Re: LS engine swap info
 

not sure how they are cleaned...just kow there are services out there for it as well as "matching" the injectors for power...but have heard of several LSx builds with used motors that sat for a long time coming across clogged injector issues.

Re: LS engine swap info
 

Do you mean the throttle body or cable? The MAF MUST be connected and piping ran from it to the TB. Just having it plugged in and hanging there won't cut it if that's how I'm understanding you have it. And id try pluggin in the O2's as well. Did you have your computer's VATS tuned out? That will hinder the injectors from operating.

also, you can test your injectors using an OHMS meter (multimeter). just unplug them and touch the prods to the 2 in the injector. i think the LS1's are 14-16ohms.
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Re: LS engine swap info
 

with this ethanol fuel the injectors clog alot easier than they used to, to identify injector problems I lifted the fuel rail and turned it over like I was going to start it, this showed 4 bad injectors. I had used the noid lights and determined they were being told to fire but they were not firing.
Also, if the PCM is set up to run a MAF and O2s that all needs to be hooked up, if its set up for speed density do you have the IAT working? most of these have a 5 wire MAF so you either have to plug in MAF to get the IAT info or pull the wiring for it and wire in a seperate IAT (I use LT1 IATs from Adv Auto).
And we are assuming VATS has been turned off.

Re: LS engine swap info
 

well well its was the brand f'n new fuel pump that was bad put another new one in , started right up runs ruff, but runs (1 step forward) wow....thats unusual......so i got hopefully a guy comin this week to help me figure out the rest and wire up everything.....7 @ SHON WHOOOO MAN slow down :) your talking waaaay over my head.... whats IAT? & VATS?

Re: LS engine swap info
 

hey Dave,
Lol that is all fuelinjectionese you are hearing and will need to get used to. as to what he is talking about they are:
IAT: Intake air temperature measure the temperature of incoming air on the engine
VATS: Vehicle anti theft system: integral part of the computer that must be shut off to run these trucks without a coded ignition key
MAF Mass air flow sensor measures the amnoutn of incoming air to adjust the fuel injector spray to get things jess right.

:D

Sean

Re: LS engine swap info
 

helps thx no idea on any of this stuff tomorrow i'll look at the brain, see If i can determine what they removed/added thx 4 the help as always

Re: LS engine swap info
 

if the truck is running it sounds like it has been removed but never hurts to check that out otherwise might get out of the driveway then die immediately not fun in one of these trucks lol.

Sean

Re: LS engine swap info
 

hey wolff, how many quarts of oil these 6 litres take, plus i have the shallower oil pan from the firebird??? & do u know approx how much stays in the engine when we drain the oil?? & what about the tranny (4l80) How much does it hold thx again

Re: LS engine swap info
 

vortec 6 liter between 6 to 6.5 quarts and trans 4l80 roughly 7.7 if it has not been overhauled or completely drained at any time.

Sean

Re: LS engine swap info
 

thx:c2: only reason i ask is after runnin it a lil' i drained the engine, only got out 4 quarts, think i put in 5 plus with the shorter pan, it reads higher on the stick....

Re: LS engine swap info
 

the fbody pans are 5.5

Re: LS engine swap info
 

ok guys looks like the PO had my "brain" played with by fuel injection specialties, i think in texas del VATS/off road/del emissions....6500 rev/no speed./3.08...totally has wrong tire size and gears.....oh boy now what my gears are the 3.83 ...and wheels are 22's...any good news???

Re: LS engine swap info
 

Hey Dave,
Should be any problem get into contact with fuel injectoin specialties and see if they can chenge the programming on your gearing and tires size shouldn't be much of a problem to do that.
their contact number is: 210 654-0774
Sean

Re: LS engine swap info
 

what problems am i looking at using it like it is tire size would just be the speedometer, correct? but the gears is my biggest concern?

Re: LS engine swap info
 

no it is more than just the speedometer, the engine itself reads data off that transmission that it needs to operate correctly. It changes the shift timing and multiple other issues with fuel mixtures and such. I shouldn't be very expensive to get those parameters changed any tuning shop that uses EFI live or HP tuners can corrent that pretyty quickly for you.

Sean

Re: LS engine swap info
 

thx wolff, a wealth of info you are....looking for some 1 here in san diego who can do it.....ANOTHER question.....top of the engine there is )2 cables the throttle and ? whats the other and do i need it? i only grabed the throtte cable thx again

Re: LS engine swap info
 

I will need this info.... :metal:
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Re: LS engine swap info
 

did not read everything so sorry if i missed it but in a 4x4 can i expect to get better MPG's with an ls or lt swap? someone told me that in a 72 with a 355 and an edelbrock carb that would probably be as good as it gets, but i can not hardly belive that with 6.0's and 5.3 getting 15+ mpg in a new truck it has to get better than an old 355 ( mabey not)

Re: LS engine swap info
 

Absolutely it should do better in mileage.

I can tell you right now, my 72 blazer with it's 355, mild crane cam, performer rpm intake and 750 holley carb, 350 turbo, 3.07 gears and 33" tall tires. I get 13 mpg around town in stop and go. On the highway cruising at 70 mph at 2400 rpms, I get 16 mpg consistently. No overdrive, no fuel injection. Just a good tune and sensable driving.

With the 6.0 (364 cubes) and 4L60E I am certain I'll do even better. For starters, the factory tunes in the trucks are pretty lame, with single digit timing in the tables, etc....it's no wonder the new trucks aren't that great on mileage. All the emissions stuff to run through doesn't help much either.

Also there are a few tricks I can do in the tune to find 2-4 mpg in the part throttle areas. Doing the math,,cruising as 70 mph with this setup is only 16-1700 rpms (I'd like to see it a tad higher) and a gear change may be in order.
In any event, by the time I'm done, 20mpg or more highway isn't out of the question.
I tune my 4th gen camaros, and get 30+ mpg highway out of those with the LS1/6 speed combo.

Re: LS engine swap info
 

hummm... thanks man

Re: LS engine swap info
 

what swap would get me the most bang for the buck in a 1989 3500 4x4 crew cab RV puller? I like the Cummins idea but that = mucho $

Re: LS engine swap info
 

Are you looking for pulling power or gas mileage??

When it comes to both, it's hard to beat a turbo diesel. I just can't justify the cost so those are out of the question for me.

I use a 79 1 ton for pulling my 28 foot enclosed. The 454 was getting tired so in my case it made more sense to rebuild with a stroker crank (aka 496).
The old 454 would get 14 mpg highway with 3.73's and a 400 turbo. I lost some of that with the 496 but I was after more towing power for the hills around Arizona. It's all a matter of what is more important to you.

Re: LS engine swap info
 

It has a small block 5.7 stock engine now, best of both worlds. You know, no power AND bad mpg's. I dont expect to get better mileage out of a stroker (383) or a big block but my 30 ft toybox only allows 25 mph on some grades with the stock engine. I have heard a lot of praise to the 383, but how much more work/money would it take to swap to the 496? I have a turbo 400 trans in it now but I also have a Getrag 5 spd I could have swapped in. I am looking for pulling power more than anything, but dont want to get too many $ wrapped up in it.

Re: LS engine swap info
 

Hmm, I'm surprised an 89 3500 crew cab would come with a 350 for an engine.

Swapping to a bigblock is a pretty big chore if you don't have a donor truck to start with. Every bracket and accessory is different, that's not even getting into all the computer controls and tuning differences.

My old 79 is a factory 454 1 ton, so it was already there, when it was time for a refresh the 496 stroker just seemed like the next logical step for me ;)

If I were in your shoes and didn't have a donor truck to steal from, I'd stick with the small block package and maybe look at some of the crate engines like the HT383. Or if you know of a reputable machine shop then stroking the 350 to a 383 is cost effective. Actually it's about a wash when it comes to rebuilding one anyway. That's probably the least expensive way to go if you dont' mind some down time.

Re: LS engine swap info
 

thanks for the reply, I wondered what was involved with the big block swap. Do you have to change fuel delivery when you go to a 383 or will the tbi that is on it now be sufficent?

Re: LS engine swap info
 

I tune carbs and newer LSx fuel injection stuff, but the throttle body stuff is an older design that uses a computer chip and completely different software.
I used to tune tuned port injection stuff which used that software made or sold by Moates, of which I no longer have.
At the very least you would have to find a place that can reflash your E-prom so it's more suited for the fuel and timing requirements of the 383. Other than that, in a nutshell what you have should transfer over and work.
TPIS is one place that comes to mind. Arizona Speed is another. They both still tinker with E-prom style computers as well as design and build intake and fuel systems for this style fuel injection.

Re: LS engine swap info
 

Just tossing out a different idea - How about lower gear set for the TH400? Many manufacturers make a 2.75 first gear and 1.57 second gear for the TH400, as well as the 4L80e. This could get your mass moving better. But, if it's cruising speed your after, then I agree, you need a heart transplant.

A stroker motor would be the cheapest and easiest route since you already have a small block in place. However, big block will give more grunt. A 454 would probably be the next "cheaper" step, but like stated above, it would be easiest to find a donor vehicle for all the parts you don't think of until things don't line up quite right. But to tempt you even further, perhaps an 8.1L would be fun. A 496 with fuel injection from the factory. But I think we've blown the budget by now. So back to the 383.

Just my .02

Re: LS engine swap info
 

I thought of the 8.1 but would'nt you have to intall a computer or something?

Re: LS engine swap info
 

Yes, you would. And that brings other headaches, challenges, or opportunities to learn new stuff, depending on your outlook. I'm also not sure what the "recyclers" are wanting for them. Easy + cheap = 383, me thinks.