hey everyone hope all of you are well today^_^
my issue is that under full boost my car hesitates at around 4000 rpm under full throttle.if i keep the peddle pressed down it will hesitate then accelerate then hesitate again and it will do that till red line.
under normal driving conditions or slight acceleration there is no issues at all and the car is perfectly normal,the only time it starts to act up is under full boost.
i pulled out the plugs and checked them,they are ngk 1 step colder copper plugs and they looked fine,they have only been in there for about 7000 miles.
coil pack and connectors looked good as well.
i cleaned the mass air flow sensor,i checked for boost leaks which there was none.the car is not running lean under full boost when it hesitates,i have verified that by looking at my wide-band.it is also not over boosting.i also switched out the maf from another car that was running fine.
no cel, the front afr sensor,the oem one, has about 90,000 miles on it,the fuel filter is at about 10,000.i also checked my feedback knock and fine knock tables and nothing is showing up there either,dam is still currently at 16 as well.
checked the fuel pressure just turning the ignition to on it went to 35 and with the car on it idle at 40,i did this test on the fuel filter outlet side.
and with the the fuel pressure regulator vac line off.turning ignition on fuel pressure wast at 0 and then at idle it was at 45
the only thing i can really think of is the spark plugs can they be bad even though they look fine,but they looked fine to me,and i don't know why they would just start causing problems now,all of sudden,but this is just a thought.please let me know if you have any ideas
i am pro tuned and my engine mods are
turbo xs tmic
turbo back exhaust
grimmspeed crank pulley
deatschwerks 565cc spec c injectors
deatschwerks 301 fuel pump
cobb maf hose
perrin turbo inlet
perrin turbo blanket
k&n air filter
prosport boost gauge