1.6 MFI Conversion

Post by **WasabiPimpNinja** » Wed Mar 12, 2008 10:59 am

I'm in the process of swapping my 1.3 carb for a 1.6 MFI motor. I've got almost everything sorted, just a couple of quick questions...

1: While I have the 1.6 on the floor is there anything I should check maintenance wise before I put it in the Zook?

2: It's going in a '97 Coil Sierra. Will the fuel lines need to be upgraded, and will a VL Fuel pump do the job on it's own, without a primer/surge tank?

Cheers.

Post by **Gwagensteve** » Wed Mar 12, 2008 2:09 pm

1) Timing belt. Water pump and rear main if you're keen.

2) just put a vitara pickup with swimmer pump in your stock tank. best possible outcome.

Yes, upgrade lines to EFI hose. return isn't as critical as it should never have any pressure on it, but feed is very important. remember you need an EFI filter too. I use VL commodore on mine.

size is 8mm on supply and 6mm on return.

Post by **WasabiPimpNinja** » Wed Mar 12, 2008 2:22 pm

How hard is it to put the vitara pickup/pump in my tank? Does the tank need to be dropped out or can it be done in situ?

Post by **Gwagensteve** » Wed Mar 12, 2008 3:18 pm

No, tank will have to be dropped.

As you have a coil tank, it's just a bolt in. Obviously it needs power from the fuel pump relay in your engine loom.

I pull the body when I do engine conversions - only takes about 1/2 a day tops then every other job is easy. Just my approach though- it's more beneficial when gearbox work is being done as part of the job.

Steve.

Post by **mud4b** » Wed Mar 12, 2008 8:36 pm

just some info.

sj80 sierras do already come with a high pressure efi fuel filter and also high pressure efi fuel hoses. now in saying that it does never hurt to swap them out if it has not been done for a while.

cheers mark

Post by **Gwagensteve** » Thu Mar 13, 2008 6:37 am

mud4b wrote:just some info.

sj80 sierras do already come with a high pressure efi fuel filter and also high pressure efi fuel hoses. now in saying that it does never hurt to swap them out if it has not been done for a while.

cheers mark

Didn't know that Mark, thanks for the info.

Steve.

Post by **WasabiPimpNinja** » Thu Mar 13, 2008 8:03 am

Sweet, thanks very much for all the info. The guy I've bought the motor/wiring off has given me a Feroza fuel pump, as they are external, easy to install, and manage to feed the Feroza's 1.6 fine. And it was FREE!

I had a feeling that the fuel lines were high pressure but wasn't sure. I'll go over the lines and check that there are no cracks or anything. If it looks dodge, I'll swap it out, otherwise we'll see how it goes for now.

On a bit of a budget this week and I need it running pretty quickly, hence wanting to take a few "shortcuts"

Post by **joshnz1** » Thu Mar 13, 2008 9:49 pm

Gwagensteve wrote:1)
return isn't as critical as it should never have any pressure on it.

most returns in efi have up to about 10psi in fuel pressure

Post by **mud4b** » Sat Mar 15, 2008 12:29 am

WasabiPimpNinja wrote:
On a bit of a budget this week and I need it running pretty quickly, hence wanting to take a few "shortcuts"

make sure those SHORTCUTS are very minimal and nothing that is major as even minor shortcuts get you stuck in the middle of nowhere, they also usually cost you a minimum of twice the amount if its as easy as that or someone else's or your own life...

just something to think about bud, not putting you down at all.

cheers mark

Post by **WasabiPimpNinja** » Mon Mar 17, 2008 7:57 am

Ok, the motor is in, the wiring is done. I changed the timing belt while I had the engine out as it looked a bit crappy, also the fan belt. Rear mains looked fine, no leaks. Needs a new spigot bearing by the look of things, but the gearbox will be coming out again soon as I need to do the synchro in second and the input seal, so I'll do the spigot then (I couldn't find one at 4:30pm Saturday

) Checked the fuel lines, no obvious signs of cracks or wear. All that needs doing now is wiring up the fuel pump and welding up the exhaust... And hoping the wiring's correct

Now can anyone tell me whether the factory loom has a cut-off switch for the fuel pump, or is this something I need to buy and wire in as well? I know it's got the relays to shut the pump off after X seconds while the ignition is on, it's just incase of a crash I want to make sure it doesn't go pumping fuel everywhere while I'm upside down

Cheers

Post by **Gwagensteve** » Mon Mar 17, 2008 8:05 am

The ECU controls this, no need for a separate cut out.

If the engine isn't running and you're not cranking it, the pump won't run for more than three seconds after keying to "on"

Do the experiment - start the engine, get it running, then stall the car in gear - as far as the car knows, you've just had a crash. The fuel pump will not be running.

Steve.

Post by **WasabiPimpNinja** » Mon Mar 17, 2008 8:28 am

Beauty, Thanks Steve. I was hoping that was the case

In that case there is a good chance I might actually get it running for Easter, wonders will never cease

Post by **mud4b** » Mon Mar 17, 2008 8:39 am

fuel pump wire is pink in colour from memory and goes into the blue plug on the lhs of the loom to the rear.

cheers mark

Post by **Zuki98** » Thu Mar 20, 2008 6:34 pm

i will be doing this conversion soon and want to know is there anyone that sells a loom already cut down? i have the complete loom and dont realy know where to start.

Post by **sic_zook** » Fri Mar 21, 2008 9:34 am

trail tough does looms n dont n adaptor kits n dont 4get 2 use the 1.3 sump n pickup so u get good clearance on the front diff but u have 2 modify the sump n pickup slitly

Post by **spamwell** » Fri Mar 21, 2008 9:49 am

DO the rear main ! i swapped in a g13bb recently anda month later i had to dropthe box out to do a rear main, what a pain in the aars

Post by **croatian4x4** » Fri Mar 21, 2008 2:24 pm

spamwell wrote:DO the rear main ! i swapped in a g13bb recently anda month later i had to dropthe box out to do a rear main, what a pain in the aars

How do you find the 13bb?? enough poke for what you need?

Post by **spamwell** » Fri Mar 21, 2008 9:57 pm

yeah i have standard gearing and 30's and the g13bb is great big improvement over the carby 1.3 and when installing in a coily the only thing i had to customise for the conversion was the wireing everything else was either straight from the jimny or the sierra.

Post by **Zuki98** » Sun Mar 23, 2008 1:40 pm

is the sump an issue when pushing the diff forward. are the trail tough looms any good or is it just worth getn an auto lec to do the original 1

Post by **Gwagensteve** » Sun Mar 23, 2008 2:19 pm

You might get away with the vitara sump if the diff is WAY forward, but generally, you'll need the sierra sump.

Steve.

Post by **me217** » Sun Mar 23, 2008 10:16 pm

hey
im in the middle of this conversion everything is in engine sump and pickup are done. wires are in but wen i turn the key on the pump runs for abit like it should and wen i turn it to start the fuel pump will run as long as i hold it there but the engine wont crank. if i jump it at the starter it cranks fine. i was wondering where my problem is. i was really hopin to have it runnin this weekend but 2 solid days and still no go. can anybody give me some ideas as to wat could b wrong. as i really need this runnin cause i hav no car and live 10 mins from town. and me mates are gettin sick of givin me lifts.

me217

Post by **zooker** » Sun Mar 23, 2008 10:59 pm

Did you use the starter wire from the sierra loom as this is what runs from the key?

Post by **me217** » Sun Mar 23, 2008 11:01 pm

no we wired it up to the new loom. my bro did most the wiring. but im pretty sure he wired it up to use the vitara stuff thru the sierra key.

me217

EDIT:i hooked up the starter wire and she cranks now but still no spark. and the engine check light and charge light arent comin on when i turn the key to on.
any more ideas? you've bin so helpful so far

EDIT #2: dont worry its all good now and runnin sweet.

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