guys i need some serious help.....

Discuss topics related to the CA18DE and CA18DET series engines.
ca240sxcoupe
Posts: 353
Joined: Mon Mar 12, 2007 3:52 am
Car: 1989 240sx w/ca18det, 1978 Datsun 280z

Post

alright well my problems dont seem to end......... heres the list....~car will not idle.....well sometimes it will sometimes it wont~cant set idle no matter how hard i try, following the esm~at +(-) 10-15% throttle the car will buck and hesitate and the bov will continue to release pressure......~1st gear is extremely unenjoyable....car hesitates and jumps.....~im getting about 9-12 mpg when i granny drive it.........i think ferrari's get better gas mileage than me and they have V10s.......

im seriously considering getting rid of the car all together......its just not enjoyable to me anymore.....its just unconfortable to drive, i dread stopping at red lights in fear of it stalling out and not starting back up.....it sometimes will flood out on me.....and about 90% of the time its running so rich i drive with the windows down because ill die from fume inhalation....so please guys im at my wits end and im about to just give up on the car....so if anyone has any ideas of what i can do please let me know....

stuff on the car:~sr t25 turbo~3'' megan racing downpipe-punched out cat-hks super drager 3.5'' cat-back exhaust~new tps~ca18det maf(i think, it has that little cap with a screw thing under it someone let me know if it isnt)~emanage that is currently not in use

i also just recently cleaned all of the idle control stuff to see if that would help....no it didnt......and i replaced the hose for the breather on the passenger side valve cover (the one closest to the intake) and also the hoses running under the throttle body in an attempt to make things better.......so far nothing helps........

if any of you guys have any idea please let me know......

one of my concerns was about the bov, should it release with the throttle depressed at all???? because at about 10% throttle in any gear the bov will just keep venting the pressure.......just something i thought about.....well anyway thanks to anyone that reads all of this.....


dattodude
Posts: 430
Joined: Wed Jun 29, 2005 2:51 am
Car: CA18DET Datsun 1200 B110 Sedan
Contact:

Post

Throw away your blow off valve. leaky blow off valves are the biggest problem to most modded cars. You most likely have a vaccuum leak from one of the outlets you missed.

Disconnect the AAC valve (green or brown) (not blue=ficd) and set your idle.

Go for a normal drive with it disconnected and A/C off.

Set the TPS...they should never be moved unless changing camshafts to something different.

Replace the Temperature sensor (red one near TPS)


User avatar
slo
Posts: 182
Joined: Wed Oct 31, 2007 2:58 am
Car: S13

Post

ca240sxcoupe wrote:alright well my problems dont seem to end......... heres the list....~car will not idle.....well sometimes it will sometimes it wont~cant set idle no matter how hard i try, following the esm~at +(-) 10-15% throttle the car will buck and hesitate and the bov will continue to release pressure......~1st gear is extremely unenjoyable....car hesitates and jumps.....~im getting about 9-12 mpg when i granny drive it.........i think ferrari's get better gas mileage than me and they have V10s.......

im seriously considering getting rid of the car all together......its just not enjoyable to me anymore.....its just unconfortable to drive, i dread stopping at red lights in fear of it stalling out and not starting back up.....it sometimes will flood out on me.....and about 90% of the time its running so rich i drive with the windows down because ill die from fume inhalation....so please guys im at my wits end and im about to just give up on the car....so if anyone has any ideas of what i can do please let me know....

stuff on the car:~sr t25 turbo~3'' megan racing downpipe-punched out cat-hks super drager 3.5'' cat-back exhaust~new tps~ca18det maf(i think, it has that little cap with a screw thing under it someone let me know if it isnt)~emanage that is currently not in use

i also just recently cleaned all of the idle control stuff to see if that would help....no it didnt......and i replaced the hose for the breather on the passenger side valve cover (the one closest to the intake) and also the hoses running under the throttle body in an attempt to make things better.......so far nothing helps........

if any of you guys have any idea please let me know......

one of my concerns was about the bov, should it release with the throttle depressed at all???? because at about 10% throttle in any gear the bov will just keep venting the pressure.......just something i thought about.....well anyway thanks to anyone that reads all of this.....
I'm sorry that you're having so much problems with yours. I'm still a noob at this but let me ask you a few things:

Was the car running fine before then all of a sudden did it go bad?

Have you checked your timing?(One or two cogs off really makes a big difference!!)

How are you so sure that it's the idling issue and maybe not spark plugs, coil packs, fuel lines, fuel pump?

Are your vacuum lines all in? (Refer to the thread I started about vac lines)

You got gas?

Is your maf sensor faulty? (Check for wiring too)

With these series of questions I never meant to insult you in anyway. Just maybe reiterating the simple stuff b4 we move on to the deep(expensive) stuff.

Let me know if I can help in any way, bro. The members of this site has helped me so much that I need to pay it back somehow. Thanks guys!

User avatar
r34 gtr
Posts: 8909
Joined: Sun Dec 29, 2002 9:33 am
Car: 98 Nissan Frontier XE 4x4
95.5 Audi URS6 Avant 5spd
03 BMW 330i ZHP 6spd
89 Nissan 240SX base CA18DET
Location: Creepin' in your crawl space
Contact:

Post

One time I couldnt figure out what the hell was wrong with my car. I tried everything, and was about to give up and leave it where it was but then I noticed I was out of gas. HAaaaaa...a...

Its never a serious problem with these cars, they just have so many little gimmicks to help the engine idle and stuff (dumb) if one goes wrong it runs terribly. I also blame shoddy wiring (not to say yours isnt wired properly, but I mean, its so common).

nuts510
Posts: 181
Joined: Tue Nov 22, 2005 8:10 am
Car: sr20det 95 240sx, rb20det 93 240sx convertible, 78 280z turbo, 71 ca18det datsun 510, 72 scout,88 CR

Post

well with that can the gas mileage it's obviously running away too rich. First check the ECU for trouble codes. If that checks OK check your fuel pressure it sounds like your fuel pressure regulator could be closed and causing your fuel pressure to be too high. but that's where I would start. Let me know what happens

ca240sxcoupe
Posts: 353
Joined: Mon Mar 12, 2007 3:52 am
Car: 1989 240sx w/ca18det, 1978 Datsun 280z

Post

thanks for replying everyone...im going to check everything tomorrow and im also working on my new car.... its a 1978 datsun 280z.....its freaking swwwwwweeeeeeeeeet.....if you want to see pics of it go to the z forums and look at my post......


Return to “CA18DE / CA18DET Forum”