Nissan 200SX Club - South Africa

hey guys on a ca18dethere is a control solinoid that controls the fuel pressure ... can any ine tell me or show me how the vaccume lines are hooked up?? its on the passanger shock tower ... i know one vaccume goes to the fpr and one goes to the intake pipe on the turbo and another one goes to the inlet manifold but on the solinoid im not sure which one goes where.

sorry for the crap typing

Will check after work for you I know the one on the far right goes to intake to the Turbo

It doesn't control your fp, only your boost to a certain extend, smoothing it out a bit.
You can bypass it completely.

Cool thanks guys . but ia there anything that controls the fuel pressure reg ofbibput it straight to the inlet mani my car struggles itjerks and goes crazy then its lean then its over fueling all on std manegment

haha sorry dude cant check for you i havnt got a motor in

Check the ecu for fault codes. This is always step number 1.

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im not using any of that crap, connect a vacuum line directly from the back of you intake manifold to the fuel pressure regulator, then connect a vacuum line from you wastegate actuator directly to the boost nipple on you T25 on the compressor housing, and there you go no more boost cut, ive been running my ca18 like this for over a year now and no trouble, leave that solenoid valve plugged in and i blanked off all the vacuum nipples on the solenoid valve but im sure you could just leave them open and it wouldnt matter, your fuel pump might be dying or maybe your FPR itself is leaking, i had alot of issues with my car when i bought it, stuttering and idling badly and loss of power etc, corrected timing, new walbro fuel pump, rb25 FPR, and my car was 100percent afterwards.

How do you know your car is lean or over fueling? Sounds like your fuel pump.

Look at your spark plugs:

overfueling: Black
Lean: white
Perfect: tan brown sort of color

troopiec wrote:Look at your spark plugs:

overfueling: Black
Lean: white
Perfect: tan brown sort of color

Sorry for being unclear, the question was directed at smash. But thanx any way for the lesson.

Hey guys ok checked the spark plugs and they are tan brown colour. i havr a brand new walbro fuel pump .. when i pull off car is fine when i change to second it dies and then is fine again like it gets air or something in the fuel line or if im driving in 5th. At about 3000rpm it gets a jerk ....thats y i thought maybe its fpr.. if i boost then its fine but i cant boost all the time even though its fun

check the FPR yea, also if you havent checked the valve timing have a look at it aswell, my intake cam was a tooth out and it would cause spluttering and flat spots before boost.

Thanks troopiec. Does any1 know how to tell the difference between a fwd ca18det block and a rwd block?

Perhaps take some pictures and post them here, then maybe someone will spot something are be able to tell you where to check.