Detonation Help!

[BOOZTJUNKEY]

i have an r32 skyline its a four door factory auto that has been converted to manual and had a reco engine put in it (not original motor)

my mods are

fuel reg

pump (walbro)

gtr fmic

pod

supersparks

they are the important ones anyways

my problem is the engine is detonating and the car smells really fuelly more than an averge rb20de i have replaced the fuel line going to the filter aswell as the one after filter going towards the front of the engine the others look preety good and i have changed the fuel filter and its still happenig i have cleaned and check the gap on the plugs and all seems fine im thinking it is a leakin injector or something is there any way of testing them with out take them out and without using a noid light... also does any one have a pic on how the standard CAS sits mine is pulled hard right (as in the elongated holes that allow timing adjustment are not centered and the bolts are on the far left of the hole and it doesnt seem right) and i think i may have to much timing going in because the bolts dont line up with the marks on the CAS so its suspect

Thanks for any help

Cheers Bejay

[battery]

check timing then hook up consult and check for errors and report back!

[JonnoHR31]

put the standard fuel reg back on and check the timing. cas rotated clockwise is retarded from stock, so for it to still be pinging it would have to be real lean or the cas a tooth out.

[BOOZTJUNKEY]

yeah i will check the timing tommoro and why do i have to put the stock reg you think its dodgy? also i dont have a consult but i can bridge the pins to check for error codes ...

do you think it is safe to drive its my daily i need it for work

[89CAL]

If theres no major work done to the car the the stock FPR is fine, Put the stock one back on just to rule it out.

[JonnoHR31]

stock reg is more reliable than 90% of aftermarket regs and there is absolutely no reason to adjust the fuel pressure away from factory with a factory ecu

[Rolls]

has it ever been remapped or properly tuned? If not then you cant expect too much just winging it on the stock ecu

get it on the dyno and a remap/nistune

[BOOZTJUNKEY]

just looked at ecu to make sure it is a standard one...

its not its a nasty tomie stage one

which has timing and ignition maps all tinkerd with

no fuel or speed cut

no boost cut

and also tuned

for boost up aswell

as exauhst

cooler pump etc

i had a mines in my last 32 and had nothing but issuse with it i think this may something to do with it cause ther cheaply made and the agressiveness of the fuel and ignition maps also my car is on stock boost also so dont no if that helps

[Rolls]

yuck, those jap remaps are pretty terrible, 10:1 fuel ratios and shitloads of timing, not good with our fuel or climate, had a car with a mines ECU that wouldn't rev over 5.5k due to rich misfire as it was running below 9:1 fuel.

Definitely get it to a tuner and on the dyno, i recommend a nistune for how cheap and easy to tune they are, also they look stock.

Edited November 5, 2010 by Rolls

[BOOZTJUNKEY]

just put astock ecu back and not much difference a lil better but still detonating im really starting to think timing is out now or something but still waiting for my light to be given back so cant check till then will update soon

[Rolls]

If it is actually detonating it sounds like a fuelling issue, stock ECU should pull back timing loads if you've increased the boost (exhaust + fmic will do this).

Can you confirm fuel rail pressure, pump making any funny noises? Really need to get it on the dyno as detonation can kill a motor pretty quick.

[KiwiRS4T]

Did you install the fpr yourself? Is it in the right place? Put it back to stock immediately and see if there is an improvement.

[BOOZTJUNKEY]

If it is actually detonating it sounds like a fuelling issue, stock ECU should pull back timing loads if you've increased the boost (exhaust + fmic will do this).

Can you confirm fuel rail pressure, pump making any funny noises? Really need to get it on the dyno as detonation can kill a motor pretty quick.

i am running 11psi due to exaust and frountmount with no controller and i bought the car just over a week ago with all mods fitted i have not changed anything since purchace just put fuel in and i dindt seem to do this the day i got it so ine been riped or unlucky as...

i think its a fueling issue aswell now because my ideal has become irratic and will not hold steady on idle the car drops from 800 down to 400 randomly and also on idle the engine seems to have an exauhst pop it sounds like it has a standalone ecu in it is so irratic which makes me think its fuel or timing doing so only thing i change was the fuel filter and i changed the the fuel pressure from 20psi at idle to 32 psi which did not make a difference...

do i have to completly disconnect the aftermarket reg(like take the fuel lines off and have it not hooked up at all) or can i just swap the vac line from the aftermarket back to standard...

also i noticed on the gague on the reg the fuel pressure will not stay at 32 psi as the idle pops and drops so does fuel whicmh makes me thinks its a fuelling issue and pump doesnt seem to make any differnce

[BOOZTJUNKEY]

i am running 11psi due to exaust and frountmount with no controller and i bought the car just over a week ago with all mods fitted i have not changed anything since purchace just put fuel in and i dindt seem to do this the day i got it so ine been riped or unlucky as...

i think its a fueling issue aswell now because my ideal has become irratic and will not hold steady on idle the car drops from 800 down to 400 randomly and also on idle the engine seems to have an exauhst pop it sounds like it has a standalone ecu in it is so irratic which makes me think its fuel or timing doing so only thing i change was the fuel filter and i changed the the fuel pressure from 20psi at idle to 32 psi which did not make a difference...

do i have to completly disconnect the aftermarket reg(like take the fuel lines off and have it not hooked up at all) or can i just swap the vac line from the aftermarket back to standard...

also i noticed on the gague on the reg the fuel pressure will not stay at 32 psi as the idle pops and drops so does fuel whicmh makes me thinks its a fuelling issue and pump doesnt seem to make any differnce

[QWK32]

base fuel pressure for the RB20 is 35-40psi. so at 32psi your just under that which may cause issues, but at 20psi it definitely will, no wonder it was pinging.

i know you didn't install and setup the aftermarket regulator but are you saying that you have both the stock reg and the aftermarket one attached to the fuel line? it should be one or the other, not both. can you post up a pic of your fuel reg setup? oh and to disconnect the aftermarket reg you have to pull the fuel lines off as well as the vac line.

Edited November 6, 2010 by QWK32

[BOOZTJUNKEY]

base fuel pressure for the RB20 is 35-40psi. so at 32psi your just under that which may cause issues, but at 20psi it definitely will, no wonder it was pinging.

i know you didn't install and setup the aftermarket regulator but are you saying that you have both the stock reg and the aftermarket one attached to the fuel line? it should be one or the other, not both. can you post up a pic of your fuel reg setup? oh and to disconnect the aftermarket reg you have to pull the fuel lines off as well as the vac line.

yeah the stock reg was still attached but no vac line going to it

the after market reg is set up on the return line just after the reg on the rail above thermo stat housing if that makes sense will have a photo buy tonight

[JonnoHR31]

pull the aftermarket reg off, put the vac line on the stocker and see if it runs. if not the stocker is probably drilled out, if it does run and works then whoever set it up like that is slightly retarded, as no vac line on the stocker will mean higher than factory pressure whilst in vacuum.

put it all back to factory and see if it solves your problem

[Rolls]

Shouldn't be changing ANYTHING to do with a fuel reg if you are running a stock ecu, any change will completely f**k up the tune.

Put it al back 100% to stock or get a full tune, there are no other options.

[BOOZTJUNKEY]

Shouldn't be changing ANYTHING to do with a fuel reg if you are running a stock ecu, any change will completely f**k up the tune.

Put it al back 100% to stock or get a full tune, there are no other options.

i have put the stocker ecu in and hooked up my stock reg and my pingin has gone

i will get the reg checked and make sure she works before i think about putting it back on thanks guys...

one last thing what boost will the stock reg put up with before it starts to fail???

[Rolls]

Don't ever put it back on, there is no need for it, all it will do is make you need a retune, stocker is good for over 300kw and loads of boost