NA Motor Discussions regarding N/A KA24E, KA24DE, and SR20DE

Bogging issue

Old 11-12-2007, 01:30 PM
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Bogging issue

heres my issue

Chassis: 1990 240sx
Engine: 1996 engine
problem: bogging out at 3k rpm under load (when in gear), not reving up smoothly


now be4 i get jumped at here is wut ive done so far to avoid asking this

Compression test: 190 190 190 178
airleak test: tight as a virgin
EGR: blocked off completely by ebay steel plate
TPS: good (borrowed from friends car) working TPS set at .5 at idle
Injectors: working properly, even used stethescope to hear em
Spark plugs: NGK V power ( ithink) were brand new now have blow by and whitish tip, which means running lean i believe
thermostat: new
plug wires: new NGK
Timing: Stock 20BTDC setting
fuel system: new filter,strainer, and pump FPR reads 40psi at idle
MAF: proper voltage and works great, borrowed from same car as TPS
Grounds: all properly bolted down
exaust: no black smoke or any kind that would indicate blown H gasket or coolant leak
Temp sensor: did FSM way of checking if it works ( dipping in boiling water with thermostat) and is functioning...
ECU: was only throwing EGR nothing else

any body deduct anythign from this...ive gone to other forums and searched here aswell... worst case scenario id have to guess Knock sensor...whihc means ripping off intake mani...which i dont wanna have to do... anyother possibilities im more than willing to listen...
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Old 11-12-2007, 04:18 PM
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check for vacuum leaks.
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Old 11-14-2007, 02:57 PM
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its been air leaked 4 times after egr assmbly was removed...

hennce my original post:tight as a virgin...no leaks man
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Old 11-14-2007, 03:56 PM
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I'm gonna have to go with you on the knock sensor theory. Just solder a resistor in there.
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Old 11-14-2007, 09:44 PM
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Check your fuses.
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Old 11-15-2007, 10:50 AM
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Check your fuses? WTF? The anti bog control fuse?
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Old 11-17-2007, 06:20 AM
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Lol.
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Old 11-17-2007, 09:37 AM
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haha ry tellin it how it is. yea, imma have to say wire a resistor in the knock sensor
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Old 11-17-2007, 04:04 PM
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What resistor would you wire in for the knock sensor ?
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Old 11-19-2007, 03:30 PM
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i took all the air lines that go to the intake manifold except for the brake booster and fuel pressure regulator. my car also bogs at around that rpm. all i do is let it warm up and its good. hope that helps.
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Old 11-20-2007, 04:58 PM
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Still wonderin what resistor you would wire in cause that knock sensor is a pain in my ***
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Old 11-20-2007, 06:07 PM
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I can't remember offhand, but i know that if you do a google search something will come up.
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Old 12-05-2007, 03:53 PM
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so did u fix your problem??...cuz i have the same
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