I have a B16a civic turbo with eagle rods and JE pistons etc, car was mapped using crome/wideband and was running fine with a good afr for a good week, at a maximum of 7 psi on t04e.

Its running a stock fuel pump and fpr with 440cc injectors, its all of a sudden spluttering under load......does it sound like the fuel pump of fpr has 'given in'???

I also checked to plugs and they wer melted (tips gone) on cylinders 3 and 4 so its defo been running lean?? right??

 

Upgrade the fuel pump and check your fuel pressure. Cylinders 3 and 4 are furthest from the pump, so there may have been a pressure drop caused by a failing FPR or fuel pump.

 

Well checked the AFR today with wideband and it was running lean up there.

Turned out the the way the vaccums had been wired up were all wrong and i was infact running far to much boost.....the standard 2bar map sensor wasnt enjoying it......

3 bar map, fuel pump and better FPR on its way. Then more tuning.

Thanks for the help again.