Went KA-t... now I have a problem

[knx2]

So my friend and I have everything running... t3/t4 turbo... running an safc neo and wideband... not tuned... safc 0% then -23% air flow sensor 1 in 5 out... Ran fine for about a week hitting 9 afr to 5grand in boost and then let off until tune... Now tonight turbo has a hard time boosting... sometimes hits 5 pounds... and afr will not go below 13 almost always stays at 16. running the stock fpr and injectors until I get a standalone. Any ideas?

[Rusted_PS13]

shouldn't even try boosting with stock fuel system in the first place, sounds like a boost leak to me, check your IC connections

[neverlift]

unless you have planned your *** off and have supporting mods to increase you fuel flow, never use stock fuel system....

also not on a t3/4 turbo flows too much for stock shizz. I myself use stock injector till I put the 370's in. BUT I have relay mod,walbro,300 filter, removed useless fuel lines, and a fuel pressure so HIGH you would shat yourself and a freind next to you. I am on a t25 though and my romtune is pretty damn good.

if your running boost at an afr of 13:1 you may blow that bish, I like my kitty to perr at 11.5:1~10.5:1

[knx2]

Well I had everything planned out... I have a ka aluminum fuel rail and 395cc Bosch top-feed injectors to install. However, I bought a nismo fpr and it doesn't look like it will install to the fuel rail... Any thoughts.

[jiminycricket]

Try Jim Wolf's fuel rail, i'm running 370SR injetors with a 550 fuel pump from Warlbro and it works magnificantly. I'm sure the Bosch top feeds will work though. GL nonetheless.

[ghx407]

shouldn't even try boosting with stock fuel system in the first place, sounds like a boost leak to me, check your IC connections

I agree... Have you checked your air hoses, vacuum ports, and piping couplers? It sounds like your car is sucking in too much air at vacuum and leaking air under boost.

In regards to the Nismo FPR, you ought to get the "universal fit" one with the fuel rail adapter. The one they sell for the KA is almost impossible to install.

You need this FPR:http://cgi.ebay.com/ebaymotors...wItem

Not this one:http://cgi.ebay.com/ebaymotors...wItem

[neverlift]

uhm see if it fits try bolting it on go from there, I then if it doesnt work go with a megan fpr, I've had mine for like 2 years now ran some high pressures with it still do .... IIRC 30 bux on ebay

[Florida240sx]

What is your current COMPLETE set-upLike mafs? Why are you taking fuel away on a stock fuel system? Should be adding fuel lots of it....

[mias13]

your taking away fuel from a stock system.?????? why would you do that, if anything you need to add more fuel, if not your just leaning out that motor and that thing is going to pop bro. PERSONALLY i wouldn't drive an untuned car, thats just asking for something to go wrong. 1.Take the car to the tuner and have the thing run right or 2. think you can get away with driving it untuned and then just watch your motor go boom <---its a no brainer man. even if its just an AFC take it to get tuned trust me

[knx2]

I am not taking fuel away... I am adding it according to the safc settings post. I have a wideband so I know I am running ok in boost... used to be 9 now it doesn't get that close. I have the stock maf and I think I am going to check and see if the turbo is actually spinning. Oh... I forgot if oil is in the intake side right after the turbo what does that mean?

[mias13]

could be that the turbine seals are going. what kind(brand) turbo are you using, check the return line. and please GET IT TUNED!!

[knx2]

t3/t4 brandnew... eghey brand...

[mias13]

eeesshh. ebay brand. take off the turbo check the seals, and make sure everything is good. make sure the return line is on right, put teflon around the end of the return line just in case.

[scheffler]

hey check for leaks before your turbo and check your manifold for cracks I had a similar problem and i couldn't make boost cause i cracked my number 2,3 runners on my Mani. Exaughst leaks pre turbo are a scazy little whore.

[mias13]

^^true^^

[Jookmasta]

man u need to take the key out of the ignition and don't even start the car. first off your fuel setup is non-existant. get larger injectors installed asap. as for the wideband, what brand is it? 9's don't mean much in my eyes as your maf is also maxed out. where is the wideband plugged into on the DP (how far down?)? also get a better fuel pump and an adjustable fpr. you NEED to have these things if you plan on having somewhat of a reliable setup.

to a previous post, your a/f's are too rich at 10.5......it's been proven that most power is made b/w 11.5-12.0. I hover around 11.7 personally but to each his own i guess..........

[knx2]

I realize everything you are saying. I have done some research. I have the afx wideband and followed the directions to a tee. I have a 255 walboro fuel pump. I have to drive this car as a daily driver and was trying to tune it before it started acting up. I am going to get a fpr asap! Do you guys recommend a rising rate?

[ghx407]

If you plan on never ever boosting more than 6-7psi, get an RRFPR/FMU. Anything above that requires more sophisticated management to run safely.

But you already have an SAFC Neo, so I don't see why you would want to downgrade to an RRFPR/FMU.

[knx2]

Going to need more than 6-7 haha

[480sx]

You need bigger injectors, at night, when the air is colder and denser your setup is leaning out. To much air, not enough fuel basically. If you keep boosting, your will blow up your engine, im surprised you havnt already with AFR's like that. Dont boost anymore, just drive around in vacuum if its your daily driver.

Save up, buy some either 480cc or 550cc injectors and tune them with your safc and you should be set.

Using a FPR to crank up the FP will act as a bandaid to your problem. Also, turning up the FP to much will cause your injectors to stick open. Do it right and get bigger injectors.

[knx2]

i have 495cc injectors just need a fuel rail

[480sx]

Well, you dont need a top feed fuel rail unless you are going to build over 400-450 hp, the side feeds work fine. You could probably save money by selling those, and buying some used side feeds off ebay or somthing. You wont have to buy a top feed rail that way, and your FPR will work.

EDIT- Oh i see you already have a top feed rail, you can modify the FPR to work it shouldnt be that hard, you just need some high pressure fuel line and worm drive clamps and you should be good to go.

[knx2]

hmmm... Maybe I should just do that. I have the nismo fpr for the stock rail. Thanks for the good information!

[Tx-Sx-FS]

hey, sorry to boost...but i need help on setting for stock maf on dohc with the SAFC, im not sure where to put this info in either..please help!

[Jookmasta]

to tx, you can use 5 in and 5 out on the safc if your using a stock maf.

and to the OP, don't bother with an FMU. get an adjustable fpr that has a gauge so that you can tell what your fuel pressure is and adjust it if need be............