HI there

my car is having miss fire when the engine is under load,

i can rev the engine to red line no problem when the car is not in the gear,

but while i am driving it

when i gas it a little bit more, it feel like hitting the fuel cut when the engine is rev between 1500 to 4000 rpm .



this was happen after i have done 3 mins burn out.

what wrong with my car ?

Air flow meter ?

spark plug ?

wires?

coil ?



any one please help

 

Check for loose grounds, broken wires. Sounds like the secondary injectors may not be firing?

 

either the spark plug wires or the secondary injectors are good starting places

 

CHECK ENGINE CODES FIRST!

then check fuel pressure, should be around 34psi

then check spark, (use the light up spark tester NOT any back yard methods lol)

then check resistor Ohms resistance, (

then check or change plugs and wires ...

also check the pressure sensor ohm resistors,

check or change Air Flow Meter .. (i have one for sale cheap 45$ shipped) (for 86-88 rx7s only) lol



looking in mitchell now for any other things to test ... lemme know if this stuff helps and what your findings are ...



btw you WILL need a Multimeter for the tests

 

how do i check the enigne code?

if i gas the car slowly, if will run normally, no miss to redline

and today when i hear a very loud back fire noise.

looks like my car is not spark well for some reason...