i have a 2nd gen rx7 with all emissions completely gone . i have swapped out and replaced fuel filters changed the oil spark plugs and serviced the tranny as well . heres my dilemma i started to notice that anytime i get to 4k rpm in any gear the car completely loses power and bogs down like it stumbles all over the place drives fine leading up to 4k then just bogs in every gear in neutral it revs just fine i really need help with this issues friend told me to swap ecu's did that didnt help another friend told me the harness needs to be changed out maybe not sending a signal to the injectors .if anyone knows or has a general idea please please help out a fellow brother out thanks

 

Provide some more information. Year and model to start. If this is an S5 car, look up "limp mode."

 

the car is a 88 s4 na rx7
full emissions removed
straight back exhaust no cats
i believe it may be the wiring harness not sending a signal to the secondaries is there a way i can check that i have also checked and cleaned all the grounds and have checked all the fuses to make sure those werent the culprits just keeps bogging out at 4k rpm cleaned replaced and still no fix someone please offer some help

 

Your other thread.