4k rev limit :s

[ezza]

iv done ALOT of searching about this but with varying results

any ideas why it is doing this:

Ezzas - YouTube (http://www.youtube.com/watch?v=vhRHMJ9grhM)

(how do you embedd yt?)

[LUCKYxS13]

My car does the same thing but at 5k rpms. Im planing on resetting the ecu and check to see if its throwing any codes too!

[tricky_ab]

There ya go :)

vhRHMJ9grhM

[ezza]

mine is throwing knock sensor, which apparently doesnt cause this

[ezza]

thanks tricky, htf btw^?

[LUCKYxS13]

Actually for me I think it might be my fuel pump filter being clogged up. Cause sometime I hear the pump whining when I hit the rev limiter at 5k rpms! Since you got a turbo on your s14, you probably got a new pump and a filter!?

[ezza]

the car has always been turbo (silvia K's)

i think its electrical, it worked fine befor i took the engine out for tubbing etc

[xX240-SXx]

check the gap on your spark plugs that's what i did with my mk3 with 1jz swap problem solve

[sw20g]

My kae did the exact same thing only at around 5k, I was told to check the 5th gear speed sensor on the trans by multiple people. If it's unplugged the car assumes it's in 5th gear where 4k-5k would be the factory speed cut at like 112mph or whatever it is.

[ezza]

Il check gaps tomorrow too then

where can i find the 5th gear speed sensor?

[idahotuner]

nock sensor or MAf going out

[yomisiu]

click that button


http://gyazo.com/d0842d92a75c0cefb7103666f78e250f.png

then get your video link

youtube.com/watch?v=vhRHMJ9grhM&feature=player_embedded

copy just those characters in bold and put them between the YT brackets

[ezza]

ohhhhhh, thanks man

so would a knock sensor cause this?

[s13Kurt]

I say maf.

[ghost_silvia]

Do you have a safc? Mine does that when battery dies and the safc loses it's settings. Try different maf and plug gap. Good luck.

[ezza]

i have a profec e 01, no emanage or anything linked up though

also settings were saved on memory card which i have loaded back up apparently succesfully (my boost settings are as they were)

[omgRWDgoodness!]

Bee*R Rev Limitter?

[ezza]

dont own one

[Mikey McFly]

Calling MAF.

[ezza]

Having some strange problem here

The boost guage used to read negative boost when idling (as it should) but sinse this 4k rev limit it sits at 0psi untill i rev it where it lifts off the 0 into positive boost.

I have checked the vac lines and they are ok (T'd off the FPR vac line)

I have since been messing about with the coolant system and lost alot of coolant (more than i thought, i will come back to this)

Today i took the maf out and cleaned the element with MAF cleaner spray, put it back in, started the car and it still wouldnt pass 4k rpms, it was idling very high for ages (over 2k), i went to show my dad that it was still limiting at 4k so i revved it and it went past 4k and was fine, i also noticed that the boost was reading in negative psi again (as it should).

i then figured out that the reason it was idling so high was lack of coolant, topped up the coolant, idle came back down but now it wont rev past 4k again :s and the boost guage sits bang on 0psi

PLEASE someone help me out here.

Could this be something to do with the CAS? my CAS plug has been broke ever sinse i have had the car, the pins are just individually plugged in, as i say it has been like this since iv had the car but could something i have done fucked with it?

ANY help greatly appreciated

[ezza]

anyone?what would make the boost guage intermitantly read zero boost instead of negative?

[cotbu]

It's called vacuum. If this is hooked up wrong then, I'm guessing all your shit is wrong.
We need to see (post pictures or slow moving video) of all the vacuum lines and where they go. Also your fuel lines, they are easy to connect wrong then forget about.

anyone?what would make the boost guage intermitantly read zero boost instead of negative?
Lines connected wrong, then you crack open the throttle body, then you get some vacuum.

[ezza]

It looks like the 4k rev limit mystery is solved, i had overlooked an earth, i just quickly shoved a wire in this plug, put it to earth and it revved freely, any idea what this earth is from?:

http://farm7.static.flickr.com/6108/6323601754_cfec218fbf_b.jpg

Il go double check where my boost guage vac is taken from.

[ezza]

Looks like it wasn't that earth.

With that earth disconnected it revvs fine, long story short, battery terminals weren't seated 100%, after giving them a tap on with a hammer it seems fine :s

Could poor battery connection cause a limiter of sorts?