Engine Ping

[dejanz]

I have a Gtr skyline r33 vspec, intercooler, pod filters, high flowed turbos 3.5 in exhoust. and a power fc commander and computer. last night i was driving it a bit harder than usal and i notices the check engine light turned at the high rpm level. i check the commander and the engine knock there was a peak around the same time. the check engine light flikers only for a second.....

1. i dont know if it is the injects the standard 440c are maxed out

2. could be the bost becaues i noticed it was higher than usall. can that change if the day gets colder by .2 bar i havent uped the boost myself.

3. or could it be something else it ownly fliker's very briefly 2-3 times

[R31Nismoid]

The tune is what will cause it to ping 9 times outta 10

unless your fuel pump is a bit sick or soemthing else along those.

what is the knock reading from the Hand Controller?

[dejanz]

it jumped up to around 70 for .5 seonds then droped to around 28 then after that it was normal 15. how i remember it. the car runs 1bar or just under boost but the bosot showed around 1.2 it was a colder than usal night. also i am close to epty tank around the middle last quater, maybe the injectos are not getting enough pressure. they are store inj and fule pumpe

[R31Nismoid]

if the boost is spiking then could be why. Sounds like something minor on the map side.

boost shouldnt be spiking though

[dejanz]

the engine knock spiked. but the boost is usally pritty good. i have a 2 stage turbo bost controller and haven't changed it but i notices the jump yesterday and only yesterday when i gave it . also i tried it a number of times and the same result yesterday.

it isn't the first time i have tried the car out but its the first time the light came on.

could it be becaues of the air

[R31Nismoid]

im sure it could be tuned out if the spike occurs regularly and you dont wanna change controller to a better one.

few hundred and you'll be sorted. go talk to your tuner and he'll just adjust the map.

nothing major

[rob82]

Its probly running more boost, as boost was probably set on a dyno or at least during the day. Bleed valves dont compensate for temp differences as EBC do. Therefore in colder temps you run more boost. However the tuner should have allowed for more boost to be run and pulled timing out at those points. If its still doing it on the colder nights just go into INJ/IGN settings and take out 2 degrees and see if still doing it.

Oh also are you using the same RON fuel as what it was tuned on?