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Pontiac of the Month

FBIRD69's 1969 Firebird

2024 March
of the Month

Last Indian

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Posts posted by Last Indian

  1. Well if for now you ignore the possible cat issue & focus on the misfire issue I would suggest pulling the injectors & test them. To me this is the most obvious scenario if the fuel pressure is good & coils, etc check out. Lack of fuel will cause misfiring. With injectors that are fouled or plugged this will get worst as rpm increases. Remember this is a port injected system! Which means there is always fuel laying in the intake manifold. So a weak or plugged injector may not feed its cylinder the proper fuel, when the intake valve on that cylinder opens it can rob fuel from an adjacent cylinder intake area, causing a multi cylinder misfire. You can make a simple setup by getting a spare injector pigtail wire, a little giant pump, connecting hose, 12 volt supply, some gas & a container for the injector to spray into.

    • Like 1
  2. Well, first off the mechanic you went to needs to go back to class. Cats go bad! And when they do, depending on what has gone awry, they can do many different things. Code P0420 is a catalytic system code! There are many things that this can be, but one of the first is rule out the cat & the two oxygen sensors.  To do this on your own may present some issues depending on your capabilities & tools. At nearly 300,000 miles the bolts at the back of the cat that connects to the back exhaust system will more than likely need cut off & replaced. You also need a replacement or a way to check the cat for both efficiency & flow. A replacement could be a non catalytic pipe, but you still need a way to link the o2 sensors & their feedback. 
    You could also be looking at some fuel delivery issues with regard to the missfires. So check your fuel line pressure at the fuel rail. You could & more than likely do have some fowling of your injectors unless you have maintained the system well. So if you don’t use a good fuel treatment like STA-BIL & Gumout’s Regane complete fuel system cleaner I would suggest doing so.

    • Like 2
  3. 19 hours ago, Green Machine said:

    Thank you for the welcoming, insight and suggestions y’all. Good to be here!  The car has been unregistered and slightly driven in the past year. I had to replace the turbo years ago bc of an overboost situation. I’m now hearing a ticking sound coming from the top of the engine. IMG_0270.thumb.jpeg.fc6324960803fd6913d82d052e575ab1.jpeg

    I would believe you need a knowledgeable mechanic. Why? Unless you are very adept at troubleshooting a direct injection system, you’ll end up just being a part’s replacer! Which can get expensive quick. Without being there I would believe that the pressurizing pump that mounts to the upper front of the engine is causing the trouble. This pump increases the fuel pump supplied fuel from between 35psi to 155psi depending on engine rpm. 
     

    Additionally the evac system is at the back of the car usually in the upper area behind a rear tire. This involves a vacuum canister & a pump.

    E9ED7698-214E-4A16-A611-9C720DB54428.jpeg
    this is a high pressure pump for a Solstice.

    • Like 2
  4. 11 hours ago, Green Machine said:

    I own a 2007 Pontiac Solstice GXP. Code for fuel pressure regulator appears. Is this something I can fix on my own? I’ve managed to change out the battery and radiator fan module. IMG_1830.thumb.jpeg.b3640d3bfdd560b57de2c3a590157f66.jpegIMG_1828.thumb.jpeg.72fe86328bd2ee5c23ba60a3d5543855.jpegIMG_1822.thumb.jpeg.24d923831436af6e77bb9a090814c5d1.jpegIMG_0035.thumb.jpeg.42966ce05b1d9e817dd03ba31b975a04.jpeg

    Welcome to the site Dawn. What code? There are a lot of codes for fuel pressure, P0089, P0090, P0091, P0092, P00C6, P00C8, P00C9, etc, etc.

    So knowing what particular code would help to start. There may be more than one. There may also be codes set for miss fires as a result of the fuel issue. You should also check the pressure at the Schrader valve on the fuel rail. 

    • Like 2
  5. 13 hours ago, B52bombardier1 said:

    I would say that you don't have a vehicle speed sensor if that TA has its original equipment.   That would be more for the On Board Diagnostic I (OBD) vehicles in the early 90's to about 1995 and then the OBD II compliant vehicles after that.  Your vehicle would need a Powertrain Control Module / Transmission Control Module or an electronic speedometer to make use of the signal on a VSS connection.

     

    Rick

     

    14 minutes ago, Frosty said:

    I am not certain that a 1976 Firebird would have a VSS, just the speedometer cable since all the gages are analog. If you have installed some sort of electronic controls that now requires a VSS, then you need something to convert the analog out of the transmission to digital. I believe Painless Performance wiring has one. 

    If the car is stock and going to remain mostly stock, I don't think there is a VSS or a need for one.

    Ditto, Ditto. No VSS in a “70s” /2nd gen F body! All where gear driven speedo cable to an analog gage.

    • Like 2
  6. 11 hours ago, 64 kiwi boni said:

    Please explains last Indian ? … 

    love a link if there is footage :cheers:

    Well I would if I could, but it’s not 2020 anymore, so not a good idea! JustA knew what I meant! He’s a patriot, & a good one. Let’s JustA say someone who truly speaks the truth, was really close to JustA’s hometown yesterday!
    In this very moment & in this time, there is a book that never lies. It says the truth is cast to the ground & it names who does it! AND it’s not the one who was in Waterford township yesterday!

    • Thanks 1
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