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Nate's 1998 Z28 Project

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  • Pump was installed last year, it has not been ran below 1/8th tank.

    0PSI when this issue happens, full PSI when it comes back. Seems like its something electrical.

    Do relays go bad?
    1998 Chevrolet Camaro Z28 - 6 Speed

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    • Did you trap door when you did the pump? I'd check the electrical connections at the bulkhead on top of the fuel pump assembly.
      2015 Silverado

      Originally posted by JoeliusZ28
      If you need 6 and half grand to break your tires loose you shouldnt be attempting a holeshot.

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      • Sure did. Ill have to check them.

        Really odd that it worked great all summer long.
        1998 Chevrolet Camaro Z28 - 6 Speed

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        • I'd take it a step further and check the connections on the pump itself... Youll already be halfway there.
          -Joel
          1995 Z28 M6 - AI226/234 - autocross ricer
          1984 Scottsdale K10 - 305/4bbl/4spd


          WTB List:Midwest Chasis DS Loop

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          • I had a similar case this year. After I got gas the car wouldn't start. Banged on the trap door area and it fired up. Did this about 3-4 times and then it was done one day. Would not start. I figured it was a bad pump (500 mile Walbro 400). Turns out the factory wiring didn't like 20 amps. On the bottom side of the fuel pump assembly I pulled the connector off and the power terminal was melted.
            2015 Silverado

            Originally posted by JoeliusZ28
            If you need 6 and half grand to break your tires loose you shouldnt be attempting a holeshot.

            Comment


            • Not sure if others seen but we lost our baby at 19 weeks...need to do something to occupy my time. Thankfully(?) my car always has some kind of issue so I was hoping I can get all the creative genius on this forum to shoot me ideas.

              I have been able to reproduce the problem by doing nothing. Currently the car is sitting on jack stands and will randomly start, then randomly die. I have taken bumps/ rough roads out of the equation so its either temp related, vibration, or just bad parts.

              I have a racetronix fuel pump and hotwire kit. I have confirmed power is getting to the back at all times as its directly hooked to the battery. I have confirmed the car dies from lack of fuel pressure, after it dies the pump will not turn on. Its always been very noisy so its obvious if its going to fire up or not. If there is the hum from the fuel pump it starts 100% of the time.

              Since I believe I have taken power out of the equation that leaves me with ground or some kind of signal from the cars computer system telling it to turn on/or not. Anyone know of any other testing I can do? I hate to just blindly replace the fuel system again as this is very expensive but thats what I may have to do. Any help would be greatly appreciated.
              1998 Chevrolet Camaro Z28 - 6 Speed

              Comment


              • First, I'd like to offer my condolences.

                My cousin had a similar problem to you with his LT1, it turned out to be a faulty ground near the battery. The only difference here is that his car would stay running.
                Scan it for codes too. It doesn't always throw a light on when a fault comes on. Electricals are not my forte.
                sigpic
                1997 Camaro Z28 M6 with stuff done to it.

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                • Thanks, When its running I did a scan and its got nothing.

                  I just bought a new relay for the fuel pump...just to make sure.

                  New GM style pump is $400 ish. Id hate to do that but I might have to.
                  1998 Chevrolet Camaro Z28 - 6 Speed

                  Comment


                  • Did you do the trap door or was the tank dropped?
                    1999 Camaro - 6 liters of fury.....

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                    • A couple weeks ago I had to replace the fuel pump/sending unit on my firebird. I was able to find a complete unit for $64 shipped and I haven't had any problems with it so far. It even has a 10 year warranty on it (supposedly).

                      not sure if you're a fan of using cheap parts though
                      sigpic
                      Pewter '02 WS6 Trans Am, M6 LS1
                      2000 Crown Victoria LX (DD)
                      Red '
                      95 Z28 Camaro, M6 LT1 (SOLD)
                      Pewter '99 Firebird. A4 3800 (SOLD)

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                      • I remember when i did my racetronix kit. It came with dielectric grease for the ground back by the factory fuel pump floor plug....and if i remember it had a note that said failure to use the grease has led to grounding issues do to corrosion. Just a thought...
                        1999 z28 Bright Blue Metallic 1 of 10
                        1999 z28 Hugger Orange RS 1 of >309 (Sold)
                        1997 z28 White 6 speed Heads and Cam. (Sold)
                        1994 z28 PPM auto Cam only (Sold)
                        1984 sport coupe red 4 cyl (Sold)

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                        • Is the fuel filter new?
                          sigpic
                          1997 Camaro Z28 M6 with stuff done to it.

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                          • Sorry to hear that Nate.
                            2011 Ford Raptor SuperCrew
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                            2000 Camaro Z28
                            Stripped Down Drag Car Build

                            Project 1999 Camaro Z28


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                            • Originally posted by nascarnate326 View Post
                              Since I believe I have taken power out of the equation that leaves me with ground or some kind of signal from the cars computer system telling it to turn on/or not. Anyone know of any other testing I can do? I hate to just blindly replace the fuel system again as this is very expensive but thats what I may have to do. Any help would be greatly appreciated.
                              If you wanted to rule out the pcm, maybe disconnect the wire that triggers the relay from the pcm and hook it up directly to power or ground (not sure which it uses) and put a toggle switch to turn the pump on and off manually.

                              Also, not sure how, but could it be heat related?

                              Comment


                              • Originally posted by sman View Post
                                Did you do the trap door or was the tank dropped?
                                Trap Door. Replacing the pump would be very easy.

                                Originally posted by PewterPan View Post
                                A couple weeks ago I had to replace the fuel pump/sending unit on my firebird. I was able to find a complete unit for $64 shipped and I haven't had any problems with it so far. It even has a 10 year warranty on it (supposedly).

                                not sure if you're a fan of using cheap parts though
                                I believe the 1998 LS cars use a one year system..sucks. Looks like AC Delco is $369 but I trust that more than amazon. Typically though, I trust cheap parts in most cases. Fuel pump is one where id rather have the good stuff...not that its helped me so far with my racetronix kit
                                1998 Chevrolet Camaro Z28 - 6 Speed

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