Thread: car break up at 3000 rpm

the car was fine with jim wolf ecu (program for z32maf, 550msd, ) but i had 333cc skyline injectors with a stock pulsar maf car was runnin fine ............until i put in 550 msd injectors yesterday then it starts breakin up in thinkin its the injectors any ideas?

You probably already know this, but if your running MSD's at 4 bar that's probably the problem.

So if I understand correctly you had a program for z32 MAF and 550 MSD injectors and you ran Pulsar MAF and Skyline injectors just fine?

You for sure do not have to correct programing. Check to make sure it is probably in your tune if all you changed was injectors. Also if your ecu if programed for a z32 and you don't have one, there is your problem also.

yes

it drive fine to the shop then me put one the msd injectors then it break up at 3000rpm .............also stock regulator

i just see a picture with the same rail .........i have mine wrong u guys think that would make a difference?

sounds like the tune isnt programed for bigger injectors and bigger maf

but it mark on the wolf ecu z32 maf & 555 msd injectors

Time to go with Calum Real Time

i cant tune
guess what just happen just put in my stock sr20de ecu & car rev out good good good

fyi msd does not make a 555cc injector. the 50lb injector is 525cc/min and at 4 bar would be larger. Msd injectors do not like 4 bar. Sounds like your program is jacked up. The last two programs I got from jwt were screwed up and made the cars run lean.