Question about 2001 Hyundai Tiburon

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Engine knocking during hot

I have 97 hyundai tiburon im having problem about my engine i used OBDII then it comes out my plugs no.2&4 mis firing I do change my ignition coil assy new & plugs & high tention wire after i did all of this my cars runs pretty good.After two weeks the problem comes back i do clean the fuel filter & fuel pump the engine runs better but sometimes i fell the engine likes luck of fuel cos every time i press the gas its like choking then the engine lights on again then i used again the OBDII the same reading P0301,P0302,P0304 what do you thing is the problem i somebody can solve this. one more thing first thing in the morning if the engine cold it runs good you can't tell theres a problem.

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It looks like 3 of your cylinders are only working with the 4th one working every once and a while, what kind of plugs do you use? I find the Platinum 2 Bosch spark plugs are the best to use. Hope you figure it out, brst of luck!
Sven

Posted on Jun 26, 2009

4 Suggested Answers

  • 51 Answers

SOURCE: start and diesss

p0456: evap system. sensor failure
p0172: evap system. intake blocked
p0778: exaust valve control. solenoid/ecu faukt
p0300: cylinders misfire. check ht/ignition leads
p0301,303,304,305,306: same ht leads

hope this helps..

Posted on Apr 27, 2009

  • 58 Answers

SOURCE: engine runs rough at 40-70mph

have your codes cleared and as soon as your light comes back on get it checked right then. usually the first code that pops up is your problem,. and can cause faulse codes to follow. check your mass air flow sensor,. make sure the breather tube is on good and no cracks or tears in it. check fuel filter also hope this helps you in the right direction

Posted on Mar 10, 2010

SOURCE: mil is on the codes

Multiple Misfires on 4 cylinders

Need a repair shop

That is only a code report,doubt you
have more than one, unless you have
a bad intake manifold vacuum leak

Stop using it before you damage
something

Posted on Jun 10, 2011

dttech
  • 4803 Answers

SOURCE: p0136 p0156 p0401 p0402 p1131 p1151 p0171 p0174

All of that going on all at the same time is not likely at all. Are you sure the engine is actually overheating or is that just what your instrument panel is telling you?
With all of those things going on at the same time, here is what I would do. First I would take a REAL HARD look at the charging system. Goofy stuff like this is often caused by a battery with a shorted cell or an alternator with bad diodes that is feeding AC current into the computer network. The computers tend to do really goofy things when they are suffering from malnutrition.

Once I am satisfied that the charging system is in good condition, then I would clear the codes and go on a road test. If the check engine light comes back on, I would immediately scan the engine controller to find out which of the codes came back and fix it FIRST. Many times, fixing one code can fix ALL the codes. By doing it this way, you are more likely to find which one is your MAIN problem.

If your engine is actually overheating, all I can say is you need to diagnose your engine cooling system to find out why...all of the misfire codes could very likely be a result of the engine overheating and fixing the engine cooling system will most likely fix these codes.

Posted on Sep 28, 2011

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OBDII P1123 Fuel Trim Additive, System Too Rich


the obdII P1123 is a error refer to Air/fuel controller


OBDII P1123 Fuel Trim Additive, System Too Rich

the following info is a copy/paste of HMA service:


PRIMARY COMPONENT:

Air/Fuel Control System

SECONDARY SENSOR(S):

Mass Air Flow (MAF) Sensor
Throttle Position (TP) Sensor
Intake Air Temperature (IAT) Sensor
Engine Coolant Temperature (ECT) Sensor
Oxygen Sensors

FAILURE CONDITIONS

If the air/fuel mixture at idle is too rich for more than 30 seconds during two back-to-back trips, this code will be set and the Malfunction Indicator Light (MIL) will be turned on.

Details:


The code will be triggered if the following conditions are met:

Long term fuel trim value (additive) is less than -0.75 ms (-15% to -20%) for 30 seconds or more
Engine speed is less than 880 RPM (1000 RPM, 2.0L Tiburon)
Mass air flow rate is less than 6.1 g/s (7.5 g/s, 2.0L Tiburon)
Engine coolant temperature is greater than 158°F (70°C) [176°F (80°C), Accent]
Engine in closed loop operation
No canister purge occurring

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