Car runs rough. And jumps when i give it gas.

[Fbomb19]

Hello i have a 89 240sx hatch. I bought the car , the dude b4 me built it from a shell with some used single cam with god-knows how many miles lmao. But i feel that it runs pretty good. for all the problems it has. I have read some threads with some of the problems but not exactly my combo of problems.

Heres what i know is wrong with it.
1. it has a hole where the vacume line goes and doesnt have the line to teh vacum line nor does it have the sensor that goes there. i covered the hole with some duck tape until i can get the intake piece it needs and the sensor . But i honestly dont know much about cars enough to know exactly how it would make my car run .
2. When i give it gas like right after i release the clutch and i wanna go... the car rocks. I know how to drive.. 5 speed i know its not me. I drive my friends 300zx smooth as s3x. but anyways the cars almost like its getting a certian amount of gas at a time and it rocks. Or like if its blwing out a certain amount of air at a time?? if that makes sense.... I cant really explain it enough for u get a picture....
3. the car NEVER starts when it sits over night. If i turn it on the next morning it will take like 3 times to turn on. It starts but it wont idle it just cuts off. then like 4-5th try it stays in idle.


About problem number 2...... i was told to remove my catalyc converter .... BUt isnt that illegal.???? We dont have emissions here in fl but i was reading about it and it says that some mechanics will not work on my car if i remove it.Also i heard some cars depending on the year can remove their cat.... mines is 89? whats the last year u can take your cat off? I just wanna get this car in running condition so i can sell it. It runs... But runs ruff. Pls let me know whats the deal!...

[nismoracingsx]

they might have told you to remove your cat because of the whole 'dying when I give it gas' problem. A clogged catalytic converter will cause stumbling and loss of power under load...I was a line tech before the army and honestly none of the shops I worked at ever cared if the customer had a cat (and I lived in FL). But honestly a shop can test if your cat is bad before you go ripping it off.

A picture of your duct taped area might help us identify what goes in this 'hole'.

[Fbomb19]

Yeah, my god why did i buy a 240 that needs this much fcuking work! hate my life.! lol but here is a link of when i first got the 240.post5802408.html?hilit=regret#p5802408 the only ive done is replace the muffler tip with a nice chrome one and raised the piping a little so it doesnt drag. BUt when i told the guy that i wanted my cat off hes like that illegal u know that right? so i didnt know wtf was going on. And idk what it is but that whole right side of the motor i think its the egr valve or w/e... yeah i dont have one. U_U... but pls look at the link, scroll down pics what ever help me out !

[moso]

the egr is located behind the intake on the pass side, it has a metal tube that goes into the exhaust manifold (pretty easy to find) yours looks like its blocked off at the exhaust manifold. the stuff on the right of the motor near the exhaust was the air/pair system and you dont need it. the HUGE hole in your intake is definitely a problem. there is a sensor on your intake just after the filter, it meters the air and is called a mass air flow sensor (MAF or MAFS), having air enter your intake after that sensor is referred to as un-metered air and is a very bad thing. the vacuum line that comes off the valve cover is part of the pcv system and you can just stick a small hose with an air filter on it. also you should cap off or plug any vacuum lines or tips that dont go anywhere until you figure out where they go. not having a cat may be illegal but it wont effect how the car runs. the car not wanting to start in the morning is a sure sign of a fuel problem, likely a bad fuel pressure regulator, its letting your gas flow back out of the rail and into the tank so your fuel system has to prime before the car will start. you should look up the FSM for that car, as well as search for emissions removal for ka24e, egr blockoff for ka24e, as it looks as if someone has deleted all your emissions equipment.

[Fbomb19]

dammm very help ful^ thanks just a quik question taht mas all flow sensor, if i dont have it what exactly will it do? I mean i know its missing alot of shyt but i really just hate how it jerks i want it to be a smooth transition. like lets say i put it in first, release the clutch and go, unless i ride the clutch for some time the car will jerk!... Its not suppose to be like that ! im suppose to release clutch and have a smooth gear, and its not my gears becuz it does it in all of them and its not like it always happens. It just does it somtimes like alot ... Im really just trying to sell the car so i can buy a shell and put a new motor in it.

[moso]

if you dont have a maf it will not go over say 3500 rpm, im sure you have one, its the silver doohickey located just after the air filter box on the intake pipe. the bucking is probably because of the massive hole in your intake thats just off the tip of your finger in this photo.

wow thats a huge hole. and all those vacuum nipples on your intake and throttle body, that arnt hooked to vacuum lines, need plugged.
you may want to check the timing with a timing light, bad timing can cause bucking too.

i have a ka24de now but when i had my ka24e it had no emiss and no problems.

[Fbomb19]

I duck taped that that hole. lmao Ive pretty much ****** rigged everything until i can fix it. I thought it was my cat converter i was gona go get it oulled offf. Or i might still do that idk i just want it to run better!. Question.... Are dual cams easy to find? I plan on buying a 240sx shell with a bad motor and its dual are the dual cams easy to find? where can ii get one.

[moso]

why not just swap a dual into the shell you have? check the classifieds.

[loyalone]

your problem isn't your cat converter, if it were you would have good power to begin with then slowly loose power till you have none or you take foot off the gas. it won't be a jerking action. un plug the mass air and see if it smooths it out.