Massive misfire

[R1Dude]

Hi all, I have just bought a 92 fd which has been converted to non sequential running twin hks air intakes, de-catted and kakimoto exhaust (only modifications from standard). The engine was re-built using brand new rotor housings and every seal,tip and spring replaced with brand new components. I have had engine was compression tested having 9.5 bar or around that figure on both rotors.

        Now the problem I am having is as soon as it hits boost it misfires badly, spitting flames out the exhaust so I have no power, now if it is standing still and I rev it gently up to 7k it gets there but if i plant my foot it coughs and splutters and no revs same as if I`m hitting boost.

       So far I have changed the turbo`s for a set I took off my other car that I knew were very good, new plugs, leads of my other car that are good, spark igniter, coils, fuel injectors, fuel pump, ecu, boost sensor, all vacum lines, all boost pipes, crank angle sensors, I have checked that the conversion has been done correctly and it has and the problem is still there, I don`t want to break this car but if I cant fix it then I will be forced to so any advise off you guys will be much appreciated

Regards Ade

[m1tch]

Perhaps an issue with the coils or a leaking injector? When were the spark plugs changed?

[R1Dude]

Just mate they are brand new, cheers Ade

[MaLicE]

what ecu? you have checked the map sensor is connected correctly haven\'t you??

[PDale]

Are you running the standard ecu with the filters and a decat exhaust?

[R1Dude]

Map sensor is definiatly correct, it does have a standard ecu, thanks again for the replys guys :cheers

[B.Martin]

You need aftermarket managment mate, driving it on standard ecu with said mods is a bad idea. Can cause boost creep, engine to lean and pow...

big bills £££££££££££££££!

[R1Dude]

Damn! was hoping not to spend any money on this one and just sell it on, I used to run an Re Amemiya ecu on my other car before I went to apexi but sold that ages ago, what would anyone recommend? dont really want to spend much on this as it`s just to make money on, cheers guys :cheers

[HaywardRotary]

It\'s on default if its a stock ecu.

[trotter]

Damn! was hoping not to spend any money on this one and just sell it on, I used to run an Re Amemiya ecu on my other car before I went to apexi but sold that ages ago, what would anyone recommend? dont really want to spend much on this as it`s just to make money on, cheers guys :cheers

unless you want to strip everything back off to get her running right, a mappable ECU is the only way to go im afraid. A brand new PFC will set you back £500 or so, but if you get it with the Commander then it\'s £700 IIRC. Then a remap will set you back about £250.

Sorry to be the bearer of bad news bud, but if you keep boosting like that you\'re gonna break something

HTH

graeme

[R1Dude]

Mr hayward sir you are a legend, working sweet as a nut now, can`t believe I forgot about that, tax mot and its up for sale :Thumbs-up thanks again :cheers

[splinter53]

Could it be running lean? As it\'s on standard ecu and not mapped properly?

[m1tch]

Could it be running lean? As it\'s on standard ecu and not mapped properly?

The fueling and boost won\'t be controlled or managed properly on a stock ECU, the engine will go soon (like many engines that run with a decat, exhaust and intake with OEM ECUs)

[R1Dude]

I`m selling it back to the previous owner, I have informed him it needs an apexi and mapping properly otherwise bye bye engine, thanks for all the advise ppl :cheers