Troubleshooting an engine with constant misfires.

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Old Feb 10, 2003 | 10:37 AM
  #26  
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Default Re: Troubleshooting an engine with constant misfires. (VSM EXtasy)

not always . . .what about valve ajustmanet>? when was the last one done ?
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Old Feb 10, 2003 | 10:41 AM
  #27  
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Default Re: Troubleshooting an engine with constant misfires. (itr206)

valve adjustment was done about 15k ago. But my engine sounds fine, no tapping. All i hear is the misfire at idle, sometimes it idles perfect. Its then when i hit the gas starts backfiring and the car starts shaking badly.

Also if i had a bad valve or blown rings, wouldn't i have oil all over the plugs??? my cylinder 2 is fouled with fuel but all other cylinder looks good. But there is no oil on the plugs.


[Modified by VSM EXtasy, 7:59 PM 2/10/2003]
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Old Feb 10, 2003 | 11:09 AM
  #28  
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Default Re: Troubleshooting an engine with constant misfires. (VSM EXtasy)

no detonation?
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Old Feb 10, 2003 | 11:27 AM
  #29  
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Default Re: Troubleshooting an engine with constant misfires. (itr206)

nope, no detonation i can hear.
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Old Feb 10, 2003 | 11:32 AM
  #30  
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Default Re: Troubleshooting an engine with constant misfires. (VSM EXtasy)

you got hondata? maybe try and reburn the mpa and see what happens . i know they wig out sometimes. . its a shot in the dark , but worth a try righttry resettintg the ecu too ?
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Old Feb 10, 2003 | 11:48 AM
  #31  
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Default Re: Troubleshooting an engine with constant misfires. (itr206)

I have a question, I misfire but its not audible or even makes a noise/shake. I just get random misfire CEL's granted I just changed out the small orifice for the middle one on my fpr and haven't checked if I got any yet, but what can that be a sign of, if the ecu is throwing random ones but I don't feel it or see the car acting funny in any way, smoking etc...
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Old Feb 11, 2003 | 04:30 AM
  #32  
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Default Re: Troubleshooting an engine with constant misfires. (shadowdawn)

you wont until it throws that code. . . well mine would fluctuate and idle was shitty on and off when 1st started up , thats how i would know and thne the cel would come on rigght away after
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Old Feb 11, 2003 | 05:08 AM
  #33  
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Default Re: Troubleshooting an engine with constant misfires. (itr206)

I'm using a P28 ecu so i dont even get a CEL.
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Old Feb 11, 2003 | 06:22 AM
  #34  
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Default Re: Troubleshooting an engine with constant misfires. (VSM EXtasy)

if your boosting alot it could be your spark plugs Most likely the plug gap I know it sounds stupid but try to gap them @ like .022 or .023 and see if that helps
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Old Feb 11, 2003 | 06:27 AM
  #35  
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Default Re: Troubleshooting an engine with constant misfires. (GRT)

mine misfires at idle so i know its not the plugs, mine are gapped at .03
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Old Feb 11, 2003 | 08:54 AM
  #36  
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Default Re: Troubleshooting an engine with constant misfires. (VSM EXtasy)

You said that your #2 plug was fouled with fuel, switch the injector to another cylinder and see if it follows the injector. Maybe its gone bad.
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Old Feb 11, 2003 | 01:18 PM
  #37  
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Default Re: Troubleshooting an engine with constant misfires. (turbosol)

you dont have a cat on that car do you?
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