car dont idle - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

idiot goes sideways · 11-25-2006, 01:58 PM

built up my ca18det and it doesn`t idle at all !!!

i can hold it only with the gas pedal and its strange like it response to the pedal

if i get of the gas it stalls, if i step on it lightly the engine rev up to 2000rpms (even with little throtle) and stalls again, if i pump with the throtle i can keep it from stalling but it rev up to 2000rpm`s again and stall again.

i cant keep the engine with the throtle at rpm`s, like 1500 ore 2000rpm`s it revs up alone and stall afterwards

the mods are

s15 turbo
power fc
534ccm injectors + fuel pump
z32 afm
270° tomei 8.80 lift cams
lighten crankshaft/ flywheel ( all togheter about 4,5 kilo less weight with pistons and rods)
forged piston/rods (compression ratio 8,2 :1)
mhg with studs
s15 turbo

with these mods it doesn`t idle and was backfiring heavy

to test i was going back to stock cams to figure out what the problem is,
the backfiring is gone now but it doesnt idle, like i wrote above

the a/f is right about 12,5 :1 under load
i cant realy check my ignition timing when car doesnt idle
also the self learning idle program from the power fc doesn`t work when the car is not idling

i checked the throttle body and the valve for idle

so the cams are not the issue...
could it be that ligthten the crank flywheel is the problem......

i`m starting to geting clueless, ive got not much experience with modified engines (my first moded engine) so anyone a clue??

11-25-2006, 01:58 PM	#1
idiot goes sideways Leaky Injector Join Date: Jul 2005 Location: austria Posts: 105 Trader Rating: (0) Feedback Score: 0 reviews	car dont idle built up my ca18det and it doesn`t idle at all !!! i can hold it only with the gas pedal and its strange like it response to the pedal if i get of the gas it stalls, if i step on it lightly the engine rev up to 2000rpms (even with little throtle) and stalls again, if i pump with the throtle i can keep it from stalling but it rev up to 2000rpm`s again and stall again. i cant keep the engine with the throtle at rpm`s, like 1500 ore 2000rpm`s it revs up alone and stall afterwards the mods are s15 turbo power fc 534ccm injectors + fuel pump z32 afm 270° tomei 8.80 lift cams lighten crankshaft/ flywheel ( all togheter about 4,5 kilo less weight with pistons and rods) forged piston/rods (compression ratio 8,2 :1) mhg with studs s15 turbo with these mods it doesn`t idle and was backfiring heavy to test i was going back to stock cams to figure out what the problem is, the backfiring is gone now but it doesnt idle, like i wrote above the a/f is right about 12,5 :1 under load i cant realy check my ignition timing when car doesnt idle also the self learning idle program from the power fc doesn`t work when the car is not idling i checked the throttle body and the valve for idle so the cams are not the issue... could it be that ligthten the crank flywheel is the problem...... i`m starting to geting clueless, ive got not much experience with modified engines (my first moded engine) so anyone a clue??