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420A Throttle Body

Posted by Mr Ortiz, Aug 15, 2019

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  1. Mr Ortiz

    Mr Ortiz Proven Member

    32
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    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    I took off three lines on the upper intake manifold. All the three lines were right together going outward separate ways but I can’t find the third one in the middle of them all. I have no idea what kind of line it is or what but all I know is where it’s off at sucks in a lot of air. If I could find what the other end goes to or how to find it or any info would be great. I’ve changed my plugs and plug wires today because it was acting up very bad it runs a little better but doesn’t wanna stay running. Putting new throttle body gasket on tomorrow along with tps too. But most importantly I need that vacuum line on first.
    -420A engine 2.0Lt Non-Turbo
    -1998 Mistubishi Eclipse Gs
    -Engine made by Chrysler
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  2. Jay_gst97

    Jay_gst97 Probationary Member

    22
    6
    Joined Aug 15, 2019
    Ellenville, New York
    Check your firewall sensors nornally have vacuum going to them like egr solenoid and evap and stuff
     

    Street Build 109  1

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM
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  3. iFrank

    iFrank Probationary Member

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    Joined Jul 8, 2019
    Houston, Texas
    There are only two vacuum lines connected to the intake manifold. Mine has a cap on the third nipple.

    Here's a diagram of the vacuum lines connected to the intake:

    Capture.PNG
     

    56  1

    1997 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  4. BLACK'98DSM

    BLACK'98DSM Proven Member

    328
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    Joined Feb 9, 2019
    Hoover, Alabama
    Incorrect, there are three. Four if you count the one on the TB. The one from the TB goes directly to the EVAP purge solenoid. The one on the right side of the three cluster goes directly to the egr valve. The middle and left ones can easiy be followed down by the firewall.
     

    Street Build 963  8

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

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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  5. BLACK'98DSM

    BLACK'98DSM Proven Member

    328
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    Joined Feb 9, 2019
    Hoover, Alabama
    Somehow that diagram is missing a hose...

    And of yours is capped off then maybe somebody removed it
     

    Street Build 963  8

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

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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  6. iFrank

    iFrank Probationary Member

    6
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    Joined Jul 8, 2019
    Houston, Texas
    I don't have cruise control, so that might be why mine is capped off?
     

    56  1

    1997 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  7. iFrank

    iFrank Probationary Member

    6
    0
    Joined Jul 8, 2019
    Houston, Texas
    This diagram isn't that great, but it looks like there are three lines coming from the intake to the fuel pressure regulator, EGR transducer, and vehicle speed control reservoir.
    Capture.PNG
     

    56  1

    1997 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  8. ThunderChild

    ThunderChild Supporting VIP

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    Joined Jan 5, 2012
    Rathdrum, Idaho
    Yes, the middle line is for cruise control operation . If you don't have cruise, that is why it's blocked.

    Post pics of what line is leaking and where it runs to as best you can. Not all super close ups, some pulled back shots so we can see what's going on.
     

    Street Build 120  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

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    1987 Toyota Pickup/Hilux
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    Street Build 752  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

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    1992 Eagle Talon TSi AWD
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    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  9. Mr Ortiz

    Mr Ortiz Proven Member

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    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    Alright I’ll look. I put new plugs and wires on it yesterday and the throttle is still really acting up doesn’t wanna stay running.
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  10. silvreclips

    silvreclips Proven Member

    919
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    Greenville, South Carolina
    I think you have something else going on with your car. A vacuum leak on these motors will cause a high idle, but the car will not run bad or stall. The 420a doesn't use a MAF sensor to determine fueling.
     
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  11. Mr Ortiz

    Mr Ortiz Proven Member

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    Hustontown, Pennsylvania
    Yeah as of right now the throttle body gasket is off and I have a bad plug to the throttle positioning sensor. I’m gonna be putting the gasket on soon and the plug later since autozone has to freaking order everything in.
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  12. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Hoover, Alabama
    Have you conducted a compression test lately?
     

    Street Build 963  8

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

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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  13. Mr Ortiz

    Mr Ortiz Proven Member

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    Hustontown, Pennsylvania
    No. Right now I’m trying to find a vacuum line that fell off in the bay behind the engine. It goes on where my finger is. Do you know where it runs too or any tips?
     

    Attached Files:

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  14. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Hoover, Alabama
    Yes. That is for the cruise control.

    Did you not look for it when it fell off?LOL
     

    Street Build 963  8

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

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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    Mr Ortiz likes this.
  15. BLACK'98DSM

    BLACK'98DSM Proven Member

    328
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    Joined Feb 9, 2019
    Hoover, Alabama
    It should still be dangling around there somewhere, look underneath the car
     

    Street Build 963  8

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

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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  16. Mr Ortiz

    Mr Ortiz Proven Member

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    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    Yeah we got it now I found that the o2 sensor plug got caught in the belt and got chewed up. Is that why the throttle is so messed up and don’t wanna keep started?
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  17. BLACK'98DSM

    BLACK'98DSM Proven Member

    328
    84
    Joined Feb 9, 2019
    Hoover, Alabama
    The O2 sensor shouldn't keep the car from running. If anything, it would just make it run super rich or super lean.
     

    Street Build 963  8

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

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
    Loading...
  18. Mr Ortiz

    Mr Ortiz Proven Member

    32
    5
    Joined Jun 23, 2019
    Hustontown, Pennsylvania
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  19. cargabby

    cargabby Probationary Member

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    Joined Aug 16, 2019
    Dover, Delaware
    I have for sale
     
  20. Mr Ortiz

    Mr Ortiz Proven Member

    32
    5
    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    As of now I’m trying to diagnose a major problem with the car. It does not want to start at all there’s no spark to the plugs. All the symptoms point to a bad cam positioning sensor but I don’t have the money or time to guess and buy parts. It needs to be running in the next few days. And I haven’t been able to get it running I’m screwed.
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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