ka24de bogging at half to full throttle

[JAKracing]

this is what i have checked.......

changed the spark plugs
checked all grounds
unhooked MAF and it ran like shit
checked for vacuum leaks
the only thing i haven't changed is the wires, cap and rotor. need some help cause this is driving me crazy

[trigun808]

dude yes same thing is happing with me right now!
Like only when its cold to warm up is when its good.
after warm up the idle jumps and sounds like its gonna die sometimes, plus when i apply gas it bogs out.
I replaced my spark plugs, maf, spark plug wires, distrubter, checked for vac leaks, new rear o2 sensor... idk man. what to got up ur sleve?

[let5l1de]

knock sensor

~mario

[Z U L8R]

i'd check the tps real fast with a multimeter. the middle white wire should be around .5 volts with the throttle closed and the key on (of course so it gets power), and around 4. volts with the throttle wide open. the voltage should increase as you slowly open it without any dead spots.

very easy test.

Dave

[xops13]

i might need a new fuel pump. i have the same exact problem with my sr and i have checked all the things listed above except the knock sensor, i dont even know what that is, but i just bought a walbro 255 fuel pump. ill let u know whats up when after i install it.

[JAKracing]

thanks guys, and xops13 let me know what u get with that? i am also thinking fuel filter

[AEGIS]

ever try cleeanin the MAF first... does it bog on the lower RPMs? then it gets better as it reach higher RPM?.

[Z U L8R]

after you check the tps, i'd check the fuel pressure....another easy test.

Dave

[JAKracing]

no it starts out fine, but when i get over half throttle it acts like its skipping and sounds like it is hitting on 3 cylinders.....a big loss in power. but i can drive it easy and it does fine. idle is a little rough, but doesn't die out. it was sounding like it was hitting on 3 cylinders all the time before i changed the spark plugs, now like i said its just after half throttle

[Z U L8R]

have you checked the tps or fuel pressure yet?

[JAKracing]

not yet haven't had time, working 12 hrs this weekend sucks

[steve shadows]

Honestly I dont even know why you're posting a thread when you havent even checked the basics.

- TPS
- Fuel Pressure
- Timing
- Spark
- Vacuum system (you need to use a smoke machine type tester)
- Temp sensors and other sensors
- Spark plugs

[JAKracing]

Going to check the tps today

[JAKracing]

well its not the tps sensor

[JAKracing]

fixed it, i feel so stupid, it was the plug wires

[g6civcx]

Honestly I dont even know why you're posting a thread when you havent even checked the basics.

- TPS

This would be the first thing I would always check. Just put a voltmeter and measure voltage as someone slowly opens the throttle for you.

Voltage should be .5V and steadily increase as the throttle is slowly opened.