I have a 93 honda accord with the f22b jdm engine in it and i need some help my car runs fine at low rpms yet when i smash the pedal and at full throttle the car begins to backfire and hesitate at 5.5 to 7 rpms what could this be i changed cap, rotor, plugs, and pcv. I dont know what it could be? some people tell me that it is egr valve or tps sensor? has any one had any of these promblems before in the past pleaze help, help much appreciated.

 

is it fuel or timing

 

Most probably running to rich. I would do the following:

1. check coolant temp sensor
2. check O2 sensor
3. inspect catalytic converter
4. check diverter valve and vacuum leak

Might also do a compression check to make sure...

fs

 

i have the same problem at 9-1500 rpm . always from full stop start. my car is running rich as well 300mpg on an 14 accord.

 

also check the plug wires!!!