ca18det motor dont run pass 2rpm

[kamakazi817]

i just swap my ca18det into my 240sx 93. i got the car running, but when i try to go pass 2rpm it chock. dont know why? can yall help me... it will not pass 2-3 rpm.

[Liquid_Neon]

saftey loop, check codes for maf related. might be wireing or the maf itself, ecu wont let u rev when it doesnt know what kinda airflow its getting.

[kamakazi817]

how come my 240sx didnt show that i have any check eng? and so how do i know? and what is saftey loop? where can i look for at? sorry for the dumd question, but i really dont know..... first time with nissan. do any one know where the 2 hose from the vaule covoer go? it a brown, about the size of the thump, cuz i really cant fine where it go? and if anyone have a digram of all the vacuum hose for ca18det? please help me

[Liquid_Neon]

you check for codes on the ecu itself. i dont need to get into the whole process, you can find it all wicked easy.

And dont get too confused, i just call it the saftey loop. limp home mode is probably more appropriate.

[ilovecoupes]

I agree with Liquid Neonits seems like you Maf is fubarddownload a FSM. It tells you how to check for codes. It also, tells you how to test your Maf

[kamakazi817]

by the way, what it the 2 hose run from the vaule cover go? have problem with that too.

[TD or Not TD]

Sounds to me like the engine isnt properly grounded. run a few larger sized 10-4 gauge from the chassis to the engine, bolt them down possibly on the back of the cylinder head.

also the hoses on the valve cover:

the driver side one usually goes to the inlet tube on the turbo. and the one on the passenger side(closest to the intake) goes to the back of the intake manifold youll see the PCV valve sticking out. it doesnt look like a regular vacuum port.

some things that might help is searching ebay for ca18det 's and look at there engines to see where everything goes if they have clear enough pics.

also like these guys said, make sure you dont have a vacuum leak. how does the car idle? do you have a vacuum gauge? how much vacuum is it reading at idle?

[kamakazi817]

ok i double check all my vacuum line and i dont see any leak. i got the car to run pass 2rpm, but the car chock when it try to go pass 3 rpm, and everytime i hit my break to stop, the car die on me. and when ever i park my car and try to start, it make this popopo shound, but it not idle. one more thing, i chang my spark plug yesterday, and today when i take it out, it burn black. what wrong guy....

[ilovecoupes]

your running rich

check your timing

[kamakazi817]

ok guy i know i alittle dumd. but i thing i figure out what happen. i thing my vacuum line are wrong. can you please so me all the vacuum line where need to go. i re check my timing too and got that fix but still run like ****[IMG][/IMG]

Modified by kamakazi817 at 5:07 PM 11/14/2007because i 93 240sx dont come with it.
Modified by kamakazi817 at 5:08 PM 11/14/2007

[float_6969]

See the stickies. All of that stuff is for the butterfly valves in the lower intake mani. You don't need them working for the car to run properly. I generally tell people to not worry about them until you get the car running well, and then if you want to try and hook them up after that, it's OK.

How do you have them hooked up? There are a couple of different diagrams in the stickies refering to Vac line routing.

[kamakazi817]

ok i got the vacuum line run right... and still dont run right, how can i tell if my MAF it bad? and can i use the KA MAF, becuase it seem like it dont fit.. please help

[ilovecoupes]

like I said before

download a FSM. It tells you how to check for codes. It also, tells you how to test your Maf

[kamakazi817]

you are my god with nismo. so god tell me i pull out three code. 12, 13 34. i do understand the first 2 code but what it 34? my god and teacher...................... learning slowly time in time

[ilovecoupes]

Check out page EF & EC 68. it tells you what the numbers correlate to

12- something is wrong with your MAF 13- your Engine Temp sensor could be bad 34- your knock sensor is bad or your wiring could be bad

and before you say how do i check them. check page EF & EC 32 to see what pages these items are located.

you are my god with nismo. so god tell me i pull out three code. 12, 13 34. i do understand the first 2 code but what it 34? my god and teacher...................... learning slowly time in time

You wouldn't happen to be a vietcong?

[ilovecoupes]

Also, pretty much all of you questions could have been answered, by using the search button.

So, next time use it

[kamakazi817]

first of all i hate vietcong, that the reason why i am over here. second of all i know how to check them now.. but ****, where can i find CA MAF? now that i really need.....thank god