Pontiac Grand Prix P1404 EGR- The Gauges Sweep At Times

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Question:
Gauge problem on my 2004 PONTIAC Grand Prix. Regular Oil change and air filter changed. Hi,First of all thanks. When in the morning I start my car it starts ok but after the first start when I start it again it starts ok and does the gauge calibrations/checks (move all the gauge needles to end point andcome back) and then tries to stall.

Two times on different days it did stall and I had to push the gas paddle to keep it started. Any reason why its doing this? I tried to look for a fuel filter and looks like for this car the filter is in the gas tank and could not find it Online please Help thanks.

Answer:
The problem you are describing with the gauges sweeping by themselves, then stall or near stall, could be a few things. Would suggest a scan of the computers to see if any codes stored. A faulty ignition switch can cause several odd electrical problems / failures. Tapping on the ignition key when running can sometimes reveal a faulty ignition switch.

There is also a service bulletin describing one or more gauges going to zero then a stall. A problem of high resistance in the battery ground cable to upper frame rail is the cause of this. Along with a PCM re-programming.

Question:
2004 Pontiac Grand Prix GTP. 3.8L Supercharged. Check Engine Light codes P1404.
Question: I need to replace my egr valve. I am not a mechanic and have access to basic tools. Is this something I could possibly do myself in my driveway?

Answer:
Yes, this is not too difficult to replace the EGR valve on your Grand Prix. See this link for the EGR Location 3800. Just disconnect the electrical connector. Then use either a swivel socket- 10mm or 13mm to remove the 2 bolts that hold it on. If you do not have that tool, just use a basic wrench. Counterclockwise loosens all bolts. Be sure to replace the gasket as well.

Question:
2004 Pontiac GTO 5.7 liter.
Question:
Fuel gauge indicates full. Tank is about 1/4 full. When i attempt to add fuel it acts as if the tank is full and shuts the fuel nozzle off immediately. i have tried to fill up at other stations thinking maybe the pump was faulty but same results.

Answer:
OK. You have one, maybe two problems here. The most common cause of an inaccurate fuel gauge is the sending unit in the fuel tank. This part has small metal fingers that control the gauge in the dash. They tend to corrode away and give false readings. This will not effect trying to fill it.

Problems filling the tank are usually caused by what is called the EVAP vent valve. When they stick closed, it causes backpressure in the fuel tank when trying to fill it because the air cannot vent . That part is located in the drivers side rear wheel well. This can also cause a check engine light but not always.

Question:
Pontiac Grand Prix GT 1997. Is there an EVAP switch on this model vehicle the one with three ports. It's located on the back of my engine and it's got 1 vent valve that's it. Uncapped and not connected to anything every diagram I look at doesn't show this being a part of the engine.

Answer:
If this is the supercharged engine, then yes, otherwise the EVAP purge solenoid is on the front of the engine.