Another bogging issue... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*DALAZ_68* · 11-12-2007, 02:19 PM

Fellow Zilvanians ... i need ur assistance and knowledge

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...

11-12-2007, 02:19 PM	#1
DALAZ_68 not giving a fuck Join Date: Apr 2007 Location: Los angeles Age: 38 Posts: 15,077 Trader Rating: (104) Feedback Score: 104 reviews	Another bogging issue... Fellow Zilvanians ... i need ur assistance and knowledge 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...