Low idle & loss of hp

[Lunchboxboy3]

Lately my car is crapping out on me. I have 204k miles on my ka24de (trying to get my car back home so i can swap it, rb25 yay). When i start it up the exhaust sounds louder than normal. when driving it around the block, i have a loss in power and i get backfire. It idles now at 500 and sounds like it wants to cut out. I can feel the motor shake and when I rev, sounds like ****.

I have replaced the spark plugs and wires, distributor cap and rotor, and ignition coil. I was able to start it up and drive it fine. But as soon as i got the rpm's past 5k, i lost hp and my exhaust sounded ****ty (kind of like a wrx sti with my hks exhaust...).Thinking about replacing fuel injectors and possible the fuel filter, but dont want to spend more money on it if it wont fix the problem.

Please help, thank you.

[pflicht]

OK i had a similar problem with mine. Couldn't for the life of me figure out what was wrong. Couldn't give it very much gas, always wanted to die, and have VERY little power. I replaced everything (Plugs, Plug wires, cap, rotor, injectors) NOTHING. Then I pulled the fuel pump out and the filter was clogged. Got a can of break cleaner, sprayed the filter clean, and BAM!!! She ran beautifully afterwards.

[Lunchboxboy3]

I will try to clean it tomorrow and see if it doesnt work. Hope it does. Thanks for the advice and help.

[Lunchboxboy3]

so i change the fuel filter also... probably needed changed anyways. but my car is still acting up. so i look at my exhaust and cat. I smell exhaust from under my car and notice that my exhaust is shaking bad. Is it possible that my cat is the cause of all this? that maybe i wasted all this money replacing everything? Going to have my buddy mail my test pipe up and throw it on.. see if it was my cat the whole time. I checked down my exhaust to make sure nothing was blocking it, but looked fine.

[pflicht]

Im not talking the FUEL FILTER in the engine bay. Go to the trunk... Lift up the carpet if there is any there. There will be a shiny gray metal object with black wire coming from that. Unscrew that. Then there will be another set of screws underneath it (I think 8 or 9 in all) REMOVE THEM!!!****CAUTION****once you have removed those screws you will pull out your fuel pump assembly... BUT BE VERY CAREFUL NOT TO DAMAGE ANYTHING OR BLOW ANYTHING UP!!!!! There will be a filter of sorts on the end of this contraption. That is the filter im talking about. If it is not white"ish" clean it with the break cleaner. Replace, screw everything back together, and start that summ biotch up!****END OF CAUTION****

[WWJD]

it's known as the fuel pump sock LOL funny I know. when mine sounded like a WRX it turned out to be the fuel pump took a dump. don't go throwen' money at your car blind. take your time and go threw everything first b4 you buy stuff.

[Lunchboxboy3]

well, still cant find the problem. Checked my fuel pump and the filter today and everything seemed fine. I cant check my cat or exhaust due to the fact that all my tools are 5 hours away at my house. I now have to suck in my pride and stop being stubborn. I have to take it to a shop tomorrow and pay some mechanic to find the problem, even though I probably know more about nissans than him. If only I had a garage with all the tools i would ever need... but i can day dream

[Lunchboxboy3]

so i take it to the shop today and then head to my classes. i get a call from the mechanic saying he cant find a thing wrong with it... its not throwing codes for him, doesnt sound bad, and their lead tech took it for a test drive and nothing. so i get there and my car is fine... maybe it corrected itself. Drove it all day today and its fine. It sucks cause i wanted to know the problem. going back home next week for break, my buddy and i are going to find out why it was acting up, even if the problem is gone

[louok2]

I got the same problem with my 89 240 hatch with the ka24e the car wont die but the idle will drop below 500rpm and jump to 850rpm and then settle at 750 , all this happens when i depress the clutch i want to build my 240 to 220rwhp but if i wont figure this out theres no point on doing mods if you figure out the problem let me know please.

[mannyS14]

Good luck with the swap!!!!! Post some pictures!

[RockStar240]

Check your IACV, sounds like its either sticking or not functioning properly

[irichjohn]

how do i clean my fuel pump & wat kind of cleaner do i use?

[irichjohn]

how do i clean fuel pump & wat kind of cleaner do i use?

[s13fOr_me]

break cleaner will do

[Lunchboxboy3]

I think I may have found the problem. Like i said before, i replaced the spark plugs and wires, distributor cap and rotor, ignition coil, and fuel filter. I put a can of dry gas and injector cleaner in my gas tank, and still it acted up. So I went home for break and got my buddies together to try and figure it out. We changed the oil, transmission fluid, and then seafoamed my motor. I had a large amount of carbon build up in my motor. After the seafoam, the car has been running beautifully. I have yet to have the problem with my car for a week now.

~for those of you that want to know how~My buddy and I bought a can of seafoam, removed a vacuum line on the motor head. He started the car and let the vacuum line suck in the seafoam. You have to rev the motor a little otherwise it will stall out. After sucking in about 3/4ths of the bottle, he let my motor die. You then let the car sit for about 30min and start it back up. *make sure your outside and not in the garage*. If you have a carbon build up, smoke will pour out of your exhaust. You keep running it and reving it til the smoke stops pouring out.

This might not be whats wrong with your cars, but it seemed to fix my problem. I would suggest it anyways cause your car probably needs it and it helps your idle problem.

[irichjohn]

wers d vacuum line in the motor head?show some pix pls.tnx

[Lunchboxboy3]

I would, but my camera is broke. I'll try and get one of my roomates camera too get you pictures. The best way to describe it is look at the back of the motor... should be a line coming from behind the intake manifold. its not big, about the size of a straw.

But like i said, try and find a camera to get pictures. otherwise i would suggest going online and searching for diagrams for it.

[Lunchboxboy3]

zerothread?id=126583

Here is a forum on how to seafoam your motor the right way. He even has pictures uploaded to help you out.

[94HRDBDY]

i have a KA24E, i dont know what vaccum line to use for my intake man. the pic isnt specific to my motor. its in a 96 hardbody. any advice would be great

[robinsone]

89 240 with 228k miles, my IAA was the problem, I wasn't getting enough air at idle and I was flooding the engine, hence the stalling. I'd say clean the IAA and see if that fixes it. Although, like mine I cleaned it but I still had a bad IAA valve.