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2G Bad throttle response

Posted by Inkdlyfe, Sep 16, 2019

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  1. Inkdlyfe

    Inkdlyfe Proven Member

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    Joined Feb 23, 2016
    Summer feild, Florida
    So this question is referring to another car here that I'm working on but cant figure it out, the main issue is the fact it will not go past 4,000 or maybe some time 5,000 rpms but when it does it will act fine. Had a TPS high input and faulty cell come up. I added a new tps to it and I know the car sees it does to a bluetooth scan tool. The tps on the phone is saying its acting and rising rpms as needed BUT the car seems to wanna die ? Like the rpms drop instead of actually rise. Sounds like a bad misfire when you reve up but then it acts fine, till you drive it . Then back to the 5k problem, there is no cell for a tps no more only o2 sensor. I unplug the tps seems to run fine with it unplugged only randomly acts up at 5k. Car is damn near stock besides a fpr and a tiny turbo. I'm not sure about internal work but it has a stock fuel set up.
     
  2. rEclipserGST

    rEclipserGST Proven Member

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    Joined Nov 17, 2007
    Columbus, Ohio
    When do you plan on replacing the o2 sensor?
     

    Street Build 619  25

    1995 Eagle Talon TSi AWD
    187 whp · 200 lb/ft · 2G DSM
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  3. Inkdlyfe

    Inkdlyfe Proven Member

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    Joined Feb 23, 2016
    Summer feild, Florida
    Tomorrow it comes in the mail
     
  4. Bo0sTeD 4G63

    Bo0sTeD 4G63 Supporting Member

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    57
    Joined Aug 31, 2008
    Miami, Florida
    Have you checked the MAF sensor, check to see if the plugs are fouled... running rich? Fuel pressure? Spark?
     

    Street Build 984  1

    1997 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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  5. Inkdlyfe

    Inkdlyfe Proven Member

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    Joined Feb 23, 2016
    Summer feild, Florida
    I dont have a maf 98 420a, the plugs are fairly new only maybe 10 miles on them
     
  6. evil_eagletalon

    evil_eagletalon Proven Member

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    Joined Jan 21, 2015
    Orange, California
    Did you just slap in the tps or was it installed and adjust per specs? Sometimes the tps sensor doesnt just get slapped on with out adjustment.

    Its usually a slotted unit and per say at 0% throttle you should see 0.50 volts and 4.5 volts at wot.
     
  7. motomattx

    motomattx Proven Member

    1,759
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    Joined Dec 9, 2010
    wampum, Pennsylvania
    Vacuum leak possibly.
     

    Drag Race Build 3K  16

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  8. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Hoover, Alabama
    420a does not require adjustment of the TPS.
     

    Road Race Build 2K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    335  3

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles

    250  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles
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  9. evil_eagletalon

    evil_eagletalon Proven Member

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    Joined Jan 21, 2015
    Orange, California
    i stand corrected
     
    BLACK'98DSM likes this.
  10. BLACK'98DSM

    BLACK'98DSM Proven Member

    820
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    Joined Feb 9, 2019
    Hoover, Alabama
    @Inkdlyfe You might want to try a boost leak test. Also, how does the air filter look?
     

    Road Race Build 2K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    335  3

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles

    250  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles
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