Car is a being a homo.

[Ben Wha]

Hey yO,

When I plant my foot to the floor the car boosts fine then hits 4k, and does a gay boost cut thing. Then kicks back in again after 1 or 2secs.

Changed afm, gave it a full service, and tightened intercooler hose clamps.

I have no idea what it could be, it was tuned on 27 Nov 08, and i've hardly driven it. My only other thought is that i've somehow split or popped off a vac line somewhere. Can't even do good skids anymore :(

Mods:
S13 with RB25DET
TBE
SAFC
AVCR
FMIC
pod
Maybe som other lil shit, but pretty much stock.

Tuned to 270hpatw @ 10psi

Any ideas would be great.

[muniom]

check the intake pipe sucking shut like i pointed out dude

[Ben Wha]

Are they meant to have a spring inside like SR's?

[Alt_F4]

Yer but they don't work. just follow this DIY...
http://www.skylinesaustralia.com/forums/Rev210-s-5min-5-Intake-P-t173019.html&hl=rev210+intake+mod

[chris123]

Have you checked plugs and leads?

[Lump]

yeh plug gap or even the fuel, since youve hardly driven it

[Nismo33]

plug gap? But at 10psi I wouldn't think it would be a problem?

[Skitzo]

The problem is its a nissan man.

[EYEH8HSV]

plug gap? But at 10psi I wouldn't think it would be a problem?

you would be surprised...when i had my r33 and raised boost/tune to around 10psi it ran like shit because of the gap of the plugs.lowered the gap then was all good.

[Lump]

plug gap? But at 10psi I wouldn't think it would be a problem?

if the gap is a bit too wide you will get a missfire at 1psi or even when you come on boost

[Ben Wha]

I changed my plugs when I did the service. Does the exact same thing as prior to the service.

Fuel pump is an 044, so I dont think there would be a fuel issue.

Another thing is the car struggles to start also, I need to give some throttle to get it going. If I dont keep a bit of throttle going it will drop the revs and almost stall. But after letting it sit at about 1k revs for 2 mins it idles fine (sits at 850ish).

When I took it back to hyperdrive (where it was tuned) Andrew said it sounds like a boost leak. I'll try that lil metal pipe mod. Munners suggested a similar mod to me a while ago, but i've been lazy.

[Ben Wha]

Also. Jared don't be so sour just because you got the dished the chop :D

[OneJ]

Ask Varrrjj - he's our resident homo.

[Lump]

I changed my plugs when I did the service. Does the exact same thing as prior to the service.
what gap are you running?

Fuel pump is an 044, so I dont think there would be a fuel issue.
if the fuel is old it could help cause your problem (on a hot day especially)

Another thing is the car struggles to start also, I need to give some throttle to get it going. If I dont keep a bit of throttle going it will drop the revs and almost stall. But after letting it sit at about 1k revs for 2 mins it idles fine (sits at 850ish).

When I took it back to hyperdrive (where it was tuned) Andrew said it sounds like a boost leak. I'll try that lil metal pipe mod. Munners suggested a similar mod to me a while ago, but i've been lazy.

..

[Ben Wha]

I had Platinums in there before, was tuned and running fine with these, then started fucking up about 2 weeks later. Didn't measure the gap when I removed them, then installed bcpr6es (or watever).

Dunno how old the fuel pump is, but when I took it out to have a look, it looked pretty new. Primes fine on start up.

[Skitzo]

Also. Jared don't be so sour just because you got the dished the chop :D

Do you want to watch the video again?

[Nismo33]

you would be surprised...when i had my r33 and raised boost/tune to around 10psi it ran like shit because of the gap of the plugs.lowered the gap then was all good.

True I guess I had no problems at 10psi but at 19 I had to narrow the plug gap to .6mm. Was already closed up for the 10psi more than likely.

[Ben Wha]

Do you want to watch the video again?

I saw no such video.

Where is it? I remember I backed off and you did a loser fly-by :shake: :lol:

[Lump]

I had Platinums in there before, was tuned and running fine with these, then started fucking up about 2 weeks later. Didn't measure the gap when I removed them, then installed bcpr6es (or watever).

Dunno how old the fuel pump is, but when I took it out to have a look, it looked pretty new. Primes fine on start up.

you need to know what gap you are running, probably trying to run 1.1mm

im talking about your fuel quality not yur fuel pump

[Skitzo]

I saw no such video.

Where is it? I remember I backed off and you did a loser fly-by :shake: :lol:

I see you have a copy of the book of ricer excuses.

[Ben Wha]

I wrote that book.

Ok ok we'll call it a draw.

[Slip_]

The problem is its a nissan man.

Spot on.

End thread.

[ED40]

Yeah I was going to say boost leak.
Also could be a coilpack dying or something ignition related?

[Brett_J]

Fuel pressure issue

[Alt_F4]

- Coil packs / Harness breakdown
- Fuel pump doesn't have enough volts... earth fuel pump to chassis
- AFM, changed to new one, or another old... give the internal connections a re-solder.

My GTR had the ignition breakdown problem at one point, ended up being oil getting into plugs.

Just a few for you to check out :)

[VS5LUTE]

How about cheaking your earth points?

[Alt_F4]

How about cheaking your earth points?
or battery in general... car does very strange things when battery and/or leads aren't up to the job.

[luke20t]

I had Platinums in there before, was tuned and running fine with these, then started fucking up about 2 weeks later. Didn't measure the gap when I removed them, then installed bcpr6es (or watever).

Dunno how old the fuel pump is, but when I took it out to have a look, it looked pretty new. Primes fine on start up.

were the plugs bcpr6es or bcpr6es-11 (means they come gapped at 1.1)
otherwise they are gapped at .7 or .8 from memory?

[Ben Wha]

They were just bcpr6es. I'm in the process of doing the intake mod, and neatening up my vac lines. I'll see if this works, if not then it's all booked in to the workshop.

Whats the quickest and best way to check for vac leaks?

[VS5LUTE]

Ben, cheak what the voltage is on the battery while the car is running. Could be your altenator - comes on boost the coilpacks dont have enough charge = missing and running like shit.

[Ben Wha]

Kane, my turbo timer say the voltage is at 12.5.

I did the intake mod, and went over and checked my vac lines (couldnt find anything.

Took it for a thrash, seems to be worse, I kept pushing it thru thr flat spot. Went 4k, boost cut, 5k boost cut, 6k Massive gun shot pop out the back. Sounds like a firing issue, but its confusing because it was tuned like that and was fine for a couple of weeks.

[MMM]

afm

[Ben Wha]

Na it's not AFM, I cleaned mine (nothing happened) borrowed a mates (nothing happened)

[SLEEKA]

If you havent re-gapped the spark plugs and you have just the bcpr6es they will come pre-gapped to 0.8mm. Normally this would be fine with a new car since the coils are nice and new. The rb25 is getting on now and its a common fault for the coilpacks to die. If its getting worse i would be looking at that area first. Get a set of splitfires, i know its not the cheapest of things especially with the yen/aud crap but it should be done. Try to gap them down to 0.6mm, your idle might suffer a little bit but if it doesnt clear up the missing up in the rpm range i would go straight to the next thing, coils.

What series rb25 do you have? I might have some stock coils that you can try, process of elimination is always the best way to attack these things.

[SLEEKA]

also is that 12.5volts whilst its running? if so thats abit low, it should be around 13ish volts and as high as 14volts if its been sitting around for a while.
Stick the multimeter on the battery and get some one to crank it over, and see what volts it gets, then measure it at idle and rev it up to 3k and measure it again.

[bLaM]

um hes got splitfire coilpacks in there already....

maybe way off, but have you tried putting in another rb25 turbo? maybe actuators fukd itself?

[Joe]

You've changed the plugs, but make sure the heat range isn't too hot...this can cause the problem you're describing.

I had this problem and went to a colder plug, because the spark was being blown out. Problem solved.

[Ben Wha]

Yeh sorry I forgot to mention the splitfires. The voltage after driving a bit now stays at ~14.2, but then sometimes sits at 12.5.

Also with the old plugs, it was running fine (for a few weeks) then started the problem. Changed the plugs to resolve the prob, but they didn't work.

[Lump]

i would try a set of 7 heat range plugs, or even 8.
gapped to 0.8mm

[Ben Wha]

Got the car back yesterday and it turns out, my safc had its buttons pushed by flying around in the glove box :D

Was dumping 50% fuel at 4k.

[breet180]

Hahaha, IM ABOUT TO BREAK!

[HomeDawwg]

haha what a bastard!