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whats wrong with her...

 
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Old 01-31-2012, 07:18 PM
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whats wrong with her...



when at warm temperature and abrupt acceleration when at idle, she studders and hesitates like this.... anyone know what the problem is? help pleassssseeeee
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Old 01-31-2012, 08:38 PM
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Re: whats wrong with her...

new dist, new spark plugs and wires, loosened and tried turning the dist to different angles, but problem still exists....
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Old 01-31-2012, 08:52 PM
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Re: whats wrong with her...

Bad head gasket ? was there oil on any of the spark plugs when you took them out ?
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Old 01-31-2012, 10:02 PM
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Re: whats wrong with her...

well the first thing with any problem is start with the small stuff i think it might be a fuel problem judging buy the demand for fuel it hesitates have you tried a new fuel filter how long has this been happening? does it only do it at idle or when your driving to?
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Old 01-31-2012, 10:53 PM
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Re: whats wrong with her...

no oil on plugs, and forgot to menntion new fuel filter.. checked fuel pressure and it was normal when during ignition, but after turned on it lost half its pressure, checked fuel pump, it was priming, could hear it turn on and prime.




video takin while the car is warm, first two revs were from idle, and the last revs were i kept a little bit of pressure on the gas pedal.

it has been happening for about 3months now... i even have that problem where the car doesnt start but cranks when hot, was thinking it could still be a timing problem?
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Old 01-31-2012, 10:58 PM
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Re: whats wrong with her...

idk if the video would do any help, its just that from idle it does this, but instead if shes like how do you say... running? the opposite of idle lol? then i can abruplty give gas without the hesitation....
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Old 02-01-2012, 12:24 AM
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Re: whats wrong with her...

Have you checked your ignition coil? or your Spark plug Wires? If not try some fuel injector cleaner!
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Old 02-01-2012, 12:32 AM
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Re: whats wrong with her...

ouuuuuu the ignition coil.... havent even bother to check that, woooowwwwww. that i shall do tomorrow asap
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Old 02-01-2012, 02:21 AM
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Re: whats wrong with her...

bad o2 sensor.

do you have any codes.
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Old 02-01-2012, 02:26 AM
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Re: whats wrong with her...

nope no codes aaattttt aaallllllllllllllllll
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Old 02-01-2012, 05:34 AM
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Re: whats wrong with her...

so you did change distributor cap and rotor?

change fuel filter

is your cat alive?
ever adjusted your valves?
ever cleaned your injectors?
ever checked does your header/intake manifold/throttle body gasket leak?

it could be also bad grounding

Last edited by TypeT; 02-01-2012 at 05:40 AM.
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Old 02-01-2012, 08:05 AM
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Re: whats wrong with her...

You say you are losing fuel pressure when the car is turned on? It could be the fuel pressure regulator.
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Old 02-01-2012, 08:33 AM
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Re: whats wrong with her...

Quote:
Originally Posted by abelsgotspeed View Post
bad o2 sensor.

do you have any codes.
Unplug the intake O2 sensor to see if this helps. Just unhook the plug to the O2 sensor in the front intake manifold.

O2 sensor only produces a CEL when its heating circuit is bad and so there would no CEL if the readings are wrong. It might be bad readings or flat readings from the O2 sensor that is causing the computer to miscalculate.

If you have a 96 lude, hook up the OBD-II scanner to see the outputs of the sensors in the car.
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Old 02-01-2012, 05:31 PM
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Re: whats wrong with her...

You could be running on 3 cylinders change your spark plugs and wires
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Old 02-01-2012, 07:42 PM
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Re: whats wrong with her...

i already changed my spark plugs and wires, and i have a 93 prelude vtec. heres a pic that had a crack in it.... could this be the problem?


, on Flickr

Last edited by kennnerton; 02-01-2012 at 07:48 PM.
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Old 02-01-2012, 09:14 PM
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Re: whats wrong with her...

Quote:
Originally Posted by mr0x View Post
Unplug the intake O2 sensor to see if this helps. Just unhook the plug to the O2 sensor in the front intake manifold.

O2 sensor only produces a CEL when its heating circuit is bad and so there would no CEL if the readings are wrong. It might be bad readings or flat readings from the O2 sensor that is causing the computer to miscalculate.

If you have a 96 lude, hook up the OBD-II scanner to see the outputs of the sensors in the car.
can you guys explain to me how a bad O2 sensor would mess up my ignition when at warm temp? and affect my cars acceleration? im just ttrying to learn lol
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Old 02-01-2012, 09:19 PM
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Re: whats wrong with her...

Quote:
Originally Posted by abelsgotspeed View Post
bad o2 sensor.

do you have any codes.
can you guys explain to me how a bad O2 sensor would mess up my ignition when at warm temp? and affect my cars acceleration? im just ttrying to learn, and nope no codes
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Old 02-01-2012, 09:22 PM
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Re: whats wrong with her...

Quote:
Originally Posted by TypeT View Post
so you did change distributor cap and rotor?

change fuel filter

is your cat alive?
ever adjusted your valves?
ever cleaned your injectors?
ever checked does your header/intake manifold/throttle body gasket leak?

it could be also bad grounding
fuel filter has already been changed, injectors already cleaned, valves already adjusted, and checked for leaks but cant find this particular light yellow sometimes dark brownish yellow leak, dripping right from the bottom of the tranny.... checked all me resovoirs and everythings good, oil level is good..... sometimes i would have to add more coolant...
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Old 02-01-2012, 09:25 PM
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Re: whats wrong with her...

i HONESTLY do not know if this would mean ANYTHING at all... but the previous owner used premium 91 octane ever since she bought it.... and about two weeks i started using 87.... then the problemS started to occur about 3 days after........... may sound stupid or not but i dooo nooottt knoww. i would love to learn more
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Old 02-02-2012, 03:17 AM
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Re: whats wrong with her...

how about your catalytic converter? and check that grounding, it could be also bad connection there

Quote:
Originally Posted by kennnerton View Post
can you guys explain to me how a bad O2 sensor would mess up my ignition when at warm temp? and affect my cars acceleration? im just ttrying to learn lol
because it "speaks" witch ecu that controls your air/fuel ration
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Old 02-02-2012, 11:37 PM
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Re: whats wrong with her...

Quote:
Originally Posted by TypeT View Post
how about your catalytic converter? and check that grounding, it could be also bad connection there



because it "speaks" witch ecu that controls your air/fuel ration
i am honestly having trouble trying to find the primary o2 sensor..........
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Old 02-03-2012, 12:13 AM
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Re: whats wrong with her...

Quote:
Originally Posted by TypeT View Post
how about your catalytic converter? and check that grounding, it could be also bad connection there



because it "speaks" witch ecu that controls your air/fuel ration
just saw the cat question..... but the cat was replaced already because it was clogged... i know that a cat gets clogged from running rish, so it should most likely be my o2 sensor right? well which i think it why
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Old 02-03-2012, 12:23 AM
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Re: whats wrong with her...

Vacuum leak somewhere? almost sounds like a misfire but thats obviously not it.. you would be able to tell. what about your injectors? have you checked those?
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Old 02-03-2012, 04:10 AM
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Re: whats wrong with her...

Quote:
Originally Posted by kennnerton View Post
i am honestly having trouble trying to find the primary o2 sensor..........
its usually located in header or "downpipe"

http://www.onlineautomotive.co.uk/Pr...ges/LB1366.jpg
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Old 03-26-2012, 08:14 PM
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Re: whats wrong with her...

UPDATE!! Problem fixed.... It was my ICM...-__-
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Old 03-27-2012, 07:22 PM
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Re: whats wrong with her...

bad distributor. It really seems like these h-series low rpm hesitations usually come down to the ICM in the distributor....
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