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running bad

Posted by "awdtalon", Sep 3, 2012

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  1. "awdtalon"

    "awdtalon" Probationary Member

    16
    0
    Joined Jul 21, 2012
    jenks, Oklahoma
    OK so here the issue car was ruuning fine tags expired on me. So i parked till i got the new ones put on sat for about two weeks i went out a started let run at least once in the two weeks it sat. I finally got the tags went to go and drive it has a slight miss at idle but when you give it gas i boggs real bad has no power same problem when driving down the road. someone told me this could be bad gas but wouldnt this happen at idle to im lost. how can it go from running fine to this:confused:
     
  2. weebz1

    weebz1 Proven Member

    68
    0
    Joined Aug 16, 2012
    Hartington, Nebraska
    maybe a fuel filter started getting plugged
     
  3. 95'RS-T

    95'RS-T Proven Member

    438
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    Joined Mar 10, 2009
    Germansville, Pennsylvania
    First thing I would do is check your spark plugs and wires. Pull the plugs and see how they look. Start with the easy stuff first.
     

    445  0

    1995 Mitsubishi Eclipse GST
    · 2G DSM
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  4. NHerron

    NHerron Proven Member

    2,520
    54
    Joined Nov 5, 2011
    Missoula, Montana
    Are you out of gas possibly? How much was left in when parked?
     

    1K  0

    1997 Mitsubishi Eclipse GSX
    11.230 @ 127.000 · 2G DSM
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  5. "awdtalon"

    "awdtalon" Probationary Member

    16
    0
    Joined Jul 21, 2012
    jenks, Oklahoma
    its not the plugs new ngk gaped to .28 it has gas its just below the halfway mark it might be the fuel filter but why would it only do it when its under a load. i am getting new plug wires and fuel fillter this week to see if that will fix anything.
     
  6. Vladimir

    Vladimir Proven Member

    160
    1
    Joined Apr 28, 2010
    Hollywood, Florida
    usually when you let them seat for to long gas goes bad. Also i agree with with someone asking you,'how much gas do you have?". Its very rear when cars go broke without a cause, maybe your maf, tps,coil, or igniter is unplugged. If everything is connected and works as it should, than start checking for spark, fuel, compression etc...

    also check evap for leaks if you still have it on, all the lines. purge and canister. That will let out alot of fumes in 2 weeks.
     

    475  0

    1991 Eagle Talon TSi AWD
    · 1G DSM
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  7. bagii

    bagii Proven Member

    42
    0
    Joined Jan 3, 2012
    Salt Lake City, Utah
    double check your timing. but, likely a misfire due to fuel or spark.
     

    810  0

    1993 Mitsubishi Eclipse GSX
    13.063 @ 103.800 · 1G DSM
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  8. WES_393

    WES_393 DSM Wiseman

    3,125
    64
    Joined Jun 6, 2011
    Colo Spgs, Colorado
    To eliminate the possibility of bad gas (most likely water), I'd fill the tank half way and add a full bottle of Seafoam.
     
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  9. 95'RS-T

    95'RS-T Proven Member

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    Joined Mar 10, 2009
    Germansville, Pennsylvania
    [QUOTE="awdtalon";153080137]its not the plugs new ngk gaped to .28 it has gas its just below the halfway mark it might be the fuel filter but why would it only do it when its under a load. i am getting new plug wires and fuel fillter this week to see if that will fix anything.[/QUOTE]

    How does it run cold? Does it misfire at cold idle, is the fuel pump in the car is original? Just had a similar problem with my girlfriends 3g v6. It would run great cold quarter to half throttle, but as soon as you mashed the pedal it would hesitate to go. When it got up to temp, and you let it sit for a half hour it would run terrible like it had a misfire but all the plugs were firing. I had a random misfire code at first. Then I got the lean bank 1 and 2 codes. Anyway, turned out to be the fuel pump. Which had me stumped, because I had changed it less then 10k miles before. Verify you had spark to all 4 cylinders, by pulling the boots and listening for snapping/change in idle. Then check your fuel pressure and make sure that's correct.
     

    445  0

    1995 Mitsubishi Eclipse GST
    · 2G DSM
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  10. "awdtalon"

    "awdtalon" Probationary Member

    16
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    Joined Jul 21, 2012
    jenks, Oklahoma
    ok thing ive done but still bad even at cold start still idles fairly desent but no change in the issue new plugs again ngk gapped to .28 put some fresher gas in and bottle of seafom to gas that was in it to save from dropping tank new fuel filter got some nasty stuff coming out of the old one. still having the same problem idles ok sounds like slight miss very suttle. still wondering if it could be the gas ### filter was pretty bad but im working on it

    and pulled plug boot at idle like said and was a snapping what does that mean

    only one that didnt have a change in the idle was one closest to the belts guess it would be number one still ticking noies in all the plug all the way accross when boots are pulled
     
  11. 95'RS-T

    95'RS-T Proven Member

    438
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    Joined Mar 10, 2009
    Germansville, Pennsylvania
    Yes that's plug number one. Pull out that plug and see what it looks like. Post a pic of it if you can.
     

    445  0

    1995 Mitsubishi Eclipse GST
    · 2G DSM
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  12. "awdtalon"

    "awdtalon" Probationary Member

    16
    0
    Joined Jul 21, 2012
    jenks, Oklahoma
    Still trying to post a pic but there brand new ngk iridiums less than a week old pulled number one out black and smells like gas. Still doesn't explain why i get a change in idle with all the rest but not in the number one when i pull the boots off.

    [​IMG]
     
  13. hotrodssnova

    hotrodssnova Proven Member

    650
    45
    Joined Feb 14, 2009
    Houston, Texas
    When you pull the wire off the plug, it will not spark on that cylinder, therefore, your idle will change. If the plug you pulled the wire off doesn't change the idle, then, that's the cylinder with the problem, because its not firing, or there's no fuel in it to ignite, or there's no compression.
     

    Street Build 586  0

    1992 Plymouth Laser RS Turbo AWD
    automatic · 1G DSM
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  14. "awdtalon"

    "awdtalon" Probationary Member

    16
    0
    Joined Jul 21, 2012
    jenks, Oklahoma
    On number one there is spark and fuel so there for have to be a compression problem. How would i go about fixing this problem.
     
  15. hotrodssnova

    hotrodssnova Proven Member

    650
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    Joined Feb 14, 2009
    Houston, Texas
    If you are sure the plug is firing, and you have fuel, then a compression test is next. You can rent at most auto part stores and get the reading on all cylinders. Honestly, cylinders don't just drop compression from sitting, unless there was already a problem when you parked it. What's the oil smell like? Have you taken a visual sample of your fuel and confirmed no water in the mix? Double checked all connections?
     

    Street Build 586  0

    1992 Plymouth Laser RS Turbo AWD
    automatic · 1G DSM
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  16. "awdtalon"

    "awdtalon" Probationary Member

    16
    0
    Joined Jul 21, 2012
    jenks, Oklahoma
    ok did compression test all good.Nothing wrong with oil its fresh new gas i dropped the tank cleaned all the junk out new fuel filter same fuel pump. New plugs and wires. blt test holds good at 25+. no vacuum leaks im lost.

    could it be a sensor issue like maf or somthing along those lines
     
  17. acorn3583

    acorn3583 Proven Member

    36
    0
    Joined Nov 11, 2009
    Janesville, Iowa
    you said you just changed plugs, is it possible you could have over tightened one of them and cracked it? a buddy of mine cracked a plug the day he put it in and the car ran like absolute turd on brand new plugs. took us a while to figure that one out
     
  18. TaLN91tsI

    TaLN91tsI Proven Member

    41
    0
    Joined Aug 29, 2012
    Sacramento, California
    Verify your fuel injector on cylinder one. Rec you remove injs, cleaned and bench tested. Injectors often go bad in many ways from bad spray pattern to leaking. Find a shop that can verify and clean off the car.
     

    362  0

    1991 Eagle Talon TSi AWD
    · 1G DSM
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