OK im hoping someone has had this problem and they know enough about motors to help me!!!!
ok heres the story.(cliffs at bottom)
I usually dont drive my car too hard i keep it under 5000RPMS 80% of the time. im running ls/vtec in my crx and will post the set-up if it matters later. but i was driving to work after school today and came to an intersection. i was in second gear at ~3000 rpms ( the car has been running great with NO problems at all for the time ive had it and today was no exception) right when i strainghtend out from the turn i shifted into third at ~4000rpms it bogs hella bad rioght when third gear is engaged so i shift back down to second.
so once im in second it seems to be running fine i was really sceptical about driving it still but i decided to make the trip to work which is like 6-7 more miles. when i get to work i shut it off and see if it will start back up, it struggles to start but turns over and it starts idling at ~500 rpms~!!!! and it sounds real shitty like its misfiring or something. then i give it a little rev and it blows out some black smoke from my exhaust! kinda thick. so im all kinds of bummed out and go to work, after work i really dont want to drive it, but i live like 5-7 miles away so im like screw it and drive home real easy on it under 4000 the whole time.
So now im home, and im like "i will take out the spark plugs and check them" so i get them out and they are HELLA black/carbonated!!! like really bad, something youd see out of a 2-stroke dirtbike! so i clean them and put em back in start my motor but it runs the same. i call my friend Zak and he comes over to chec it out, we crusie to his house to get his old wire/plugs from his b16 and swap them over(yes we connected them in the correct order) and it runs the same even after that. So were like screw it make a thread so here i am. it seems to be running on all four cylinders, so we are leaning towards my valves bwing fucked up.

ok to shorten it up for people who just want to know the problems in order to diagnose this:
1: exhaust is POPPY like misfiring or something.
2: when i revved it after the first shut off following the initial problewm point it poofed out black.carbonated smoke from exhaust
3:the sprak plugs were coated heavily in carbon
4:it idles at ~500rpms! pretty harshly as it increse and decreases.
5:when its running there is a heavy odor of unburnt gasoline.

im sure theres more im forgetting that ill get to later but has anyone had this problem? or know what the problem is? let me know thanks for all the help in advance..pull me through this h-t

 

+ Madd sputtering at the touch of the gas, and smells like madd *** carbon burning.

 

yea hes the one that was at my house^ but thats what i meant by poppy....sputtering i just couldnt think of the word, thanks fool!

 

help this foo out, he thinks its a thrown code, could it be?

 

sounds like you are running really rich, possibly because your timing is off

Check the timing on it, do you have cam gears, are they set correctly?

good luck

 

check timming like said

i think it could be map related or vaccum problem ....check all your vac lines

is the check engine light on ?
if so you need to ge the code

 

Start out by running the engine and pull a plug wire off each cylinder one by one and see if it makes a difference. if it doesn't then that cylinder is dead . do a compression test too

 

sounds like a map sensor problem to me........check the map and see if the CEL is throwing a code

 

yea ..i thikn so too ...thats why i was leanign to vac related problem..usually rich sputtering and dead throttle is MAP related

you check it out yet ?

 

oh i forgot to update this one...yes the othr night i threw a code 3 which is MAP sensor as we all said. i have skunk 2 cam gears and they are both set in the middle of the 3rd and 4th little tick marks. so im guess ing thats fine since its how it was when i bought it. and i dont think the timing would slip within one shift, remember all of this happened in a split second. it was running perfect then between 2to3rd shift it bogged really bad and started sputtering, smelling like raw gas. it doesnt feel to have lost any power so im trying to scratch off loosing a cylinder. someone on here gave me a map sensor trouble shooting flow cahrt so im going to go do all of that right now then ill update.

 

You have an EXTREME misfire.....most likely timing related, so check that first of all. Hit it with a timing light and see if its out of time. Post back up after you do this.

 

sounds like map sensor died out. replace it with a new one and see wut happens or check the compression maybe ur rings blew? -__-

 

like i said it was my map sensor and it has no loss of power. the three wires on the map sesnor connector i cahecked all showed 5 volts except the white one which didnt show any volts. what i need to know is where on the ECU would i find the whgite wire....theres several white wires and i dont know which one it is. i have a obd0 pr3 ecu