I just recently noticed that when I first start my car for the day, it takes a few cranks longer than it used to. :confused: When I start it at any other time of the day after that, it starts like it is supposed to.
I also noticed at appoximately the same time the starting issue developed, my fuel pump became louder. I used to only faintly hear the fuel pump, but now it is clear as ever.
It wouldn't bother me if it had always been this way, but it used to fire right up in the morning.
Hopefully, someone here can shed some light on this.....
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Chad
'03 Z06 Traded In for
'05 Dodge Ram SRT-10.......(She will be missed)
Wish I could help.................Sometimes when I start mine up, It cranks and runs like it is supposed to for a few seconds and then the idle goes way down for a second and then catches back up. All this is without touching the gas.... When the idle dips, it almost seems like it is going to die
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Mississippi Mike
'82 Collector Edition - My First Corvette
'02 Black/ModRed Z - 11,000 Miles - Gone to Live in Georgia
'01 Speedway White/Mod Red - 1 of 137 - Getting Better Every Day
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I also noticed at appoximately the same time the starting issue developed, my fuel pump became louder. I used to only faintly hear the fuel pump, but now it is clear as ever.
You can hear the fuel pump over those PRT's??
I would get the battery checked first. Then have the fuel pump checked. I hear mine switching on when I turn the key to acessory first to watch the instrument needles swing back and forth. This is when I hear the fuel pump activate. But mine isn't too loud.
Good Luck!
It sounds like your fuel pump might be worn and that the fuel is bleeding back into the tank overnight. Did you run your car out of gas or anything?
One thing you can try to test this is when you get into your car in the morning, don't just switch it to start, but turn it to ignition on (no start) and wait for the "Corvette Welcome" in the DIC to complete before you crank it. For the first test you might do it twice before cranking it to let the system pressure build back up. (turn it to ign on, wait for needles to sweep, then turn it off, wait 2 seconds, turn it back to ign on...let the needles sweep, then try to crank it.)
The other thing you could do is to test the rail pressure in the morning to see if there is any.
Try this, turn the key to the on position, wait 5 seconds then start the car. This gives the fuel pump time build up fuel pressure at the rails, after it has been sitting overnight. Let us know if this makes any difference.
Mine has been doing the same thing for the last couple of months. I think it's because my battery is on the way out. It has started going dead if I leave the radio on for about half an hour or so with the engine off.
My gas milage has also recently gone from around 32 mpg on the highway to around 25 mpg on the highway too. It's probably time for some new plugs/wires, decarb procedure, off car injector cleaning, new battery, and a new air filter, etc (your basic tune-up). We'll see if that straightens it out.
It sounds like your fuel pump might be worn and that the fuel is bleeding back into the tank overnight.
I agree. I have a FP guage on my car. The system holds pressure amazingly well. But restarts after a bleed-down do take a few extra turns of the crank.
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Thank you all for your suggestions and insights. They are all equally valid suggestions. I will try letting the fuel pump build pressure first, and if that doesn't help, I'll look into a new battery or fuel pump, depending on the fuel pressure readings. I am lucky to have a dealer service center that actually listens to the customer!
Location: South Bay, SoCal Fest III, IV, V, WinterFest I & II
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Quote:
Originally Posted by Fasglas
Could it need a fuel filter (just a thought)?
Where is the fuel filter on these things?
Ditto, on the fuel filter thought... ...and on the location question! I haven't had much reason to take the car apart, so I still haven't noticed where it is...
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Yellow car with 4 tires and a lugnut behind the wheel.
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The filter is just up under the frame in front of the drivers side rear wheel
As a sidebar, just remember, that the FFS fuel system from mid 03 to present date does NOT have a changable fuel filter.
The new FFS fuel system is a completely different design than previous c5. This system went into production midway through the 2003 production year. This system entails all new components. The fuel filter, as it is called in the drivers side fuel tank, is larger, and can last alot longer than standard c5 filters. It is a 10 micron filter, however, the design of the filter media is substantially different from any other in Corvette history. It is very efficient, and so far, has served us very well. What this design does is decrease the production costs of the car, enhance the damping effects of the fuel pump assembly with most of the fuel system weight in the tank, and simplifies the fuel lines going to the engine. When this system was in testing, there was many things that we checked, and enough fuel was run through this system to simulate 150,000 miles of driving in the city. No clogging was evident, and the efficiency was not decreased enough to harm the drivability of the engine.
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When the idle dips, it almost seems like it is going to die 
I haven't had much reason to take the car apart, so I still haven't noticed where it is...
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