1991 ka24de-T25 whats wrong?

[240sxvaj]

i was on my way to get the car dyno tune and i discovered a big problem. the car started boggin as if it was boost leak and then the car starts to idle really low and ends up dying. Been running this car for weeks untuned and not pushing pass 3.5krpm with no problem. until i started leaving for dyno tune and all of a sudden this happened. after letting it cool off i check my boost gauge and drove it without any problem and it ran fine as if nothing happen ANd until i ran it for a couple min then the same thing happened again. boggs at certain rpm and then it dies. i used the scanner on it and it threw out code 45( Injector fuel leak) and EGR which is normal.

i checked for boost leak and i cant seem to find any leaks. also checked for vacuum leaks and the vac gauge reads 19-20. weird because the car idles fine after it cools down and boost fine.
oh yea almost forgot whenever its about to die i gas the car my rpm wouldnt go up.
it will just drop down until i let off the gas and then it idles (back to normal) ok when im not in gear

what can it be?

91 KA24De-srT25(redtop)
running 270cc injectors. have 450cc not installed(d-werks)
stock MAF
walbro 255lph
z32 fuel filter
AFC neo (not installed)
greddy type-M FMIC
HKS hotpipe ssqv combo
phase2 nobrand turbo mani
blitz3'' d/p
megan elbow
delete cat w/buddyclub spec2 exhaust
thanks!

[240sxvaj]

anyone know?

[i need tires]

im going to assume you ran your car way to much with small inj and no tune.

here are the BIG things you are missing with this KA-t project

ONE you need bigger injectors.. even if you were shifting at 3500rpm im sure you were hitting boost and not gettin enough fuel in there with those small 270cc

TWO your MAF.. why in the hell would you run a stock maf on a turbo car? the maf on the dohc ka cant handle boost, thus not reading enough air

how to fix these problems.. if nothing else is fucked up

get a z32 MAF
ATLEAST 370cc inj (INSTALL THEM)

and a rom tune to drive the car around instead on cruising it around and it not being tuned.. this is why so many KA-Ts blow up.

^^apparently you dont know much about the ka you can run the stock mafs, which we do on our 2.6kat

[98s14inaz]

Originally Posted by i need tires

im going to assume you ran your car way to much with small inj and no tune.

here are the BIG things you are missing with this KA-t project

ONE you need bigger injectors.. even if you were shifting at 3500rpm im sure you were hitting boost and not gettin enough fuel in there with those small 270cc

TWO your MAF.. why in the hell would you run a stock maf on a turbo car? the maf on the dohc ka cant handle boost, thus not reading enough air

how to fix these problems.. if nothing else is fucked up

get a z32 MAF
ATLEAST 370cc inj (INSTALL THEM)

and a rom tune to drive the car around instead on cruising it around and it not being tuned.. this is why so many KA-Ts blow up.

Yup. I hate when people do stuff like that to ka's and then wonder why they pop.

as far as the op problem, check your maf plug also how is the timing? are your sure you none of the couplers popped off or are cut?

[i need tires]

Originally Posted by staticx1134

^^apparently you dont know much about the ka you can run the stock mafs, which we do on our 2.6kat

im sure there are lots of things you can do like suck your own dick.. but why would you when you can spend money to have someone else do it?

in car terms.. why be a cheap ass and use ur stock maf when you can just buy a z32 maf and you will NEVER have to worry about maxing out ur maf until you hit like 600 hp?

also check your plugs and wires

Originally Posted by i need tires

im sure there are lots of things you can do like suck your own dick.. but why would you when you can spend money to have someone else do it?

in car terms.. why be a cheap ass and use ur stock maf when you can just buy a z32 maf and you will NEVER have to worry about maxing out ur maf until you hit like 600 hp?

I totally argee with you about upgrading MAFS, but this isnt his current prob because I doubt he is pushing 350+whp untuned.

[i need tires]

Originally Posted by staticx1134

I totally argee with you about upgrading MAFS, but this isnt his current prob because I doubt he is pushing 350+whp untuned.

ive seen ppl run 200whp untuned a blow their engine.. come on man im sure you have seen the same.

but reason i mentioned that is because this guy was going to TUNE his car with 270cc inj and a stock MAFS... keyword.. he was going to TUNE his car like this.. thank god he didnt make it to the tune he would have blown the engine on the dyno or would have gotten 150whp and cried his way home...

[98s14inaz]

Originally Posted by staticx1134

^^apparently you dont know much about the ka you can run the stock mafs, which we do on our 2.6kat

That is true, I missed that part about the mafs. Stock mafs is fine for low boost. You will get better results with a z32 though, even in low boost. Something about the resolution being better iirc.

[240sxvaj]

ok.

im not getting my car tune with stock injectors

didnt you read my set up list?

it says 450cc NOT installed! that means it will before i get it tuned

im haveing the dyno shop install it for me. the reason why i dont want to do it myself because i dont wanna mess it up. (if i do)

the reason why im running stock MAF is because i know it woulndt max out really really quick and im not a guy whose goal is 600HP LOL!
just need a fast car and daily driver.
maybe a little raceing here and there but only at the tracks

maf plug fits good. it has a clip or pin to hold it too

and my timing is retarded to 15

and plus im thinking its my coolant temp. sensor
cause when it gets hot and stalls i unplug it and drove it.
it ran a bit better til it got to its normal temp and start to act up a little but then cools off really quick

[240sxvaj]

Originally Posted by i need tires

*quoted post deleted*

ok i know about the z32 maf that it gives better flow. i dont really recommend it (seen lots of ka with stock maf)

im not expecting to shoot over 220 on the tune (if luck comes)
im not gonna boost past 9 PSI W/stock internals
heard many ka blow their hg with 12 pounds of boost (maybe less)

and my set-up its actually pretty nice

im running all brand new sr20det parts. cause im running a t25 bottom mani and all the sr parts fit on good

the only thing i needed was to make a custom test pipe because the stock cat. was about 1.5 inch away from my blitz 3in d/p

the only thing i call shitty on my shit is my custom intake.

it holds good though

[i need tires]

Originally Posted by 240sxvaj

ok i know about the z32 maf that it gives better flow. i dont really recommend it (seen lots of ka with stock maf)

im not expecting to shoot over 220 on the tune (if luck comes)
im not gonna boost paste 9 PSI
heard many ka blow their hg with 12 pounds of boost (maybe less)

and my set-up its actually pretty nice

im running all brand new sr20det parts. cause im running a t25 bottom mani and all the sr parts fit on good

the only thing i needed was to make a custom test pipe because the stock cat. was about 1 inch away from my blitz 3in d/p

why wouldnt you recommend it? just because you have seen KAs with stock MAFs... so have I haha mine came with one when i bought my s14

I can see you dont know much about the z32 MAFS...

to the op i do recommend getting the z32 maf in the near future, but for right now you will be ok with the ka maf

[i need tires]

i dont think he got the point where i was recommending stuff he should get so he doesnt have a half ass ka-t like most people do.. and the reason why peoples ka-t's dont last...

instead he took it as me trying to attack the craftman ship

this is pretty weird im saying this.. but LISTEN to what i say..(damn i remember my dad saying that to me when i was 18 too) dont jump to the defense when im just giving you good info. if i wants to attack you.. trust you can see i have no problem doing that.

[98koukile]

at 3500 rpm with a t25 your def maxing those injectors... they were probably fine b4 but now they're dying. What are you tuning with? An S14 MAF could handle low boost way better than an S13, or maybe its just the koukis that are different but I know mine is better than the s13. You won't max out the stock one with that turbo though, the problem isn't the flow, its the amount of pressure maxes out the voltage so its not reading the air that comes through when your pushing 18 lbs of boost through it. At 7 lbs its just as good as a stock sr maf. My only guess is that with zero form of tuning on your car you maxed out your injectors with the new fuel pump and they're starting to show it

[sunnys14]

He doesn't need to get a z32 maf if hes running a T25 at low boost, how many SR owners switch to z32 maf on stock T25???

You really need to upgrade injectors to atleast 370cc. Stockers aren't going to last much longer at over 100% demand.

[projectRDM]

Stock S14 KA MAF is easily fine up to 10psi. If you don't plan on ever surpassing that, you don't have to run a Z32 MAF, period. Plus the tuning is easier since you're only playing with injectors and timing. Yes, we all know the Z32 is ideally a better choice, even an N60 MAF would be a good upgrade, but it's not halfassing if you don't plan to ever reach the limits of what you have. I've seen plenty of cars make a safe and reliable 230-240whp on an OE MAF. Fueling is the major issue when doing a turbo KA, and if he does indeed plan on running the larger injectors than he's set.

That's like saying your car is capable of 150MPH, so you should run W rated tires safe for 168MPH. If you never plan of breaking 120MPH (and can't with the speed limiter anyway), why spend the extra money on a tire with a greater speed rating but lesser traction or wear ratings?

[Addicted2Kouki]

^^good stuff.

just try replacing your injectors.

heres a link, so you dont even have to search or worry about messing up.
http://forums.nicoclub.com/zerothread/179894

[i need tires]

Originally Posted by sunnys14

He doesn't need to get a z32 maf if hes running a T25 at low boost, how many SR owners switch to z32 maf on stock T25???

You really need to upgrade injectors to atleast 370cc. Stockers aren't going to last much longer at over 100% demand.

i personally will be running a t25.. z32 maf.. 550cc inj @ 21psi

[98s14inaz]

Originally Posted by 240sxvaj

ok i know about the z32 maf that it gives better flow. i dont really recommend it (seen lots of ka with stock maf)
...

It is more than flow. The resolution is better with the increased airflow. When you get more into the intricacies of tuning you will understand.

[burnsauto]

sounds like the maf could be shot (but keep in mind this is just based off what you're describing)..maybe its just dirty.

when the car dies, will it start right back up again?

[240sxvaj]

thanks for the help guys!!!!

i will check on the MAF and install my 450cc

i will let you guys know how it turns out

thanks!

[Koopa Troopa]

Originally Posted by i need tires

i personally will be running a t25.. z32 maf.. 550cc inj @ 21psi

That's the dumbest thing I've read all day.


I agree, it sounds like a problem with the MAFS

[i need tires]

Originally Posted by Koopa Troopa

That's retarded the dumbest thing I've read all day.


I agree, it sounds like a problem with the MAFS

ok let me say this

i have the ABILITY to run 21psi with the set up im getting .. and no its not the smartest thing but Champa was running it on his DD and it felt amazing!

[bo2o]

i need tires you should calm down.

yes z32 is a good ideal but its not needed untill atleast 250 whp
and yes he could run 270cc he can even up the pressure on them a lil.
make sure your maf is clean.
wen your car is idling funning restart it and it still has that prob trying starting it with the maf plug off see if it idles fine. if it does then you got a maf prob.
you still have egr? cancel all that shit. and take out charco canister. make sure you have the vacuum rounted all right.

[i need tires]

i am calm but the little man said i dont know wtf im talking about. and im a faggot. so i got a little peeved with him ya know.

[240sxvaj]

Originally Posted by i need tires

i am calm but the little man said i dont know wtf im talking about. and im a faggot. so i got a little peeved with him ya know.

hahaha i never called no one a faggot

i was here asking for some help
and got this from you! lol!

thats a very nice welcome comming from you


bo2o: thanks!

and i jb weld my egr pipe already and already scanned the code away

but then just barely ran through this.

[The Chad]

Jeez, almost scared away another one haha . I agree with all above and def post up your results of your tune when you fig out your problem. I've got a T25 rebuilt, with a Q45 MAF and stock SR injectors, as well as different brands of everything that you have but all sitting here, waiting for a warm garage to work in , so I'm definitely curious as to the results of your final tune. Keep us posted Bud! And welcome to Zilvia!!