I have REALLY bad sputtering when accelerating at low rpms.

it's manual.

when i first start the car i can hear sputtering in the engine for a while until it goes down to about 800 rpms at idle and then it sounds perfectly fine.

if at idle in no gear, i try to accelerate it is fine if i do it really slowly, but if i press on the gas at a normal speed it bogs down and the rpms get lower and lower and i could probably stall it.

same thing happens when i drive, i have to accelerate from first gearl really slowly it bogs down like crazy and comes really close to stalling and just jumps for a while until i let off the gas and go slower.

my car is practically undriveable . usually it chugs a little bit when i try to start it too for a few seconds.

i am throwing a CEL code 41 for the o2 sensor but i've had that code for about a whole year now and i've not had that problem.

i've replaced the wires, plugs, cap, rotor.

when this problem started i noticed a different smell than i was used to smelling, i dunno maybe it's not burning all the gasoline who knows.

this happens at all gears in low rpms.

if i'm in 2nd and i reach 3500 rpms or so then the car starts to act normal.

thanks for any help this is stressing me out insanely.

it's as if the rpms on my car go down when i press on the accelerator at any rate other than SUPER SLOW while letting the clutch off SUPER SLOW.

 

maybe there's too much fuel compared to oxygen??

 

could be a weak coil not providing enough spark thus not burning all fuel. also if the o2 is completely out by now its going to read rich and weak spark along with rich condition doesnt help. do a balance test when in idle you say the car idle fine when in idle? if so the balance test can help. when in idle start disconnecting fuel injector one at a time and hear for a diff. might have leaking injector causing rich condition. also if you have fuel pressure regulator is another form of balance test


http://www.youtube.com/watch?v=ZnFSUNjwDPQ&feature=plcp


http://www.youtube.com/watch?v=85nMC6xIfUg&feature=plcp


http://www.youtube.com/watch?v=5ewJIBS9L98&feature=plcp

http://www.youtube.com/watch?v=nYN-RoFVwAA&feature=plcp


http://www.youtube.com/watch?v=K7STocr9FBI&feature=plcp

http://www.youtube.com/watch?v=SsYMi3yl0T4&feature=plcp

 

man that is a lot of information. i struggled to even replace my rotor.

is there any 93 accord specific way to check the fuel injectors?

another bit of info i forgot is that when this was first happening my tank was really low and i went to the gas station and put some injector cleaner in before i filled the tank and it ran better for l ike maybe 10 minutes of driving.

how hard is it to replace the fuel injectors?

maybe i'll replace the ignition coil before that since it seems to be easier

 

If you have a pending code, fix it first. The O2 is what tells the ECU what the Air/Fuel ratio is.

If you have never changed the O2 replace it with a new unit. O2s become lazy over time, if it has become lazy enough that the cross counts are too slow, or the O2 sensor is damaged, its rather silly to try to fix what appears to be a fuel management issue when one of that systems components is faulty.

Only use Denso, NTK, or Delco/Delphi O2 sensors. Do not use the Bosch beer can style of O2.

 

Could the o2 sensor be causing starting issues I figured the o2 wouldn't effect that

 

The O2 sensor isnt in play until the car is warmed up. The ecm uses the ECT instead, then when it goes into closed circuit operation, the O2 sensor takes over. However, if it has been faulty, theres a chance the catalytic conveter is clogged, due to running rich for a year. If you cant find anything else, might want to try and remove the cat, see if it runs any better. If it does you might need to replace it.

 

The cat converter fell off about a month ago and I had it replaced with a straight pipe. I think the problem started after that happened

 

If your oxygen sensor is throwing a code, there's a good chance that that is the problem.

Secondly, good luck passing smog with no cat. lol

 

how is the o2 the problem? the 02 has no play at all until the car is in closed loop. hes having sputtering at start up. i would say that kinda sounds like a headgasket symptom. rought start, poor acceleration, poor perfomance. get a head gasket tester. or do a pressure test. or simple you can remove rad cap and turn on car. does the coolant stay still or does it rush out of the rad?

 

Oxygen sensor throwing a code = problem.

Not really sure why you think because it's not causing his startup problem it's not a problem at all.

 

im saying it becuz ive had good o2's throw codes becuz a car is running rich and o2 sensor is covered in black soot not reading right. and like i said i bad o2 will not affect start up. the o2 has no play until closed loop which is when it starts working. im sorry i just believe my teacher more then you. even my teacher said a bad o2 will not affect start up conditions. it will affect warm up conditions when its suppose to start working