I have a '90 Grand Marquis GS EFI 5.0.
Today something new started happening. The first start of the day is
very, very hard. It cranks for about 15 to 30 seconds before it will
The car normally sits from around 6PM to 10AM the next morning just
about every day and never had this problem. Every start after that
first hard one are instant, all day long, like all of them used to be
until today. Even the first start of the day was instant until today.
Maintenance on the car is kept prudently. I even change the oil every
1,500 miles. I have the car since it was new and I know every squeek.
Most sensors have been replaced by now including the IAC motor and the
EGR. Recency replaced oil sending sensor and coolant temperature
sensor. Actually, the car runs great.
Right now this is the only thing that is not right, this hard morning
Any ideas on what might be causing this?
This NG has always come up with the right answer for me for a long
You say you recently replaced the IAC motor... since the valve and motor
WERE two seperate items until about that time...what about the valve
If the occurance is new, I suggest you wait until it establishes pattern.
It could be anything.. including a worn (hard start) fuel pump. I always
listen for it, myself...
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
My _guess_ would be a fuel line leak, since I've had this symptom on
another couple of [much older :)] cars. When you leave it for a long
time, the line empties and the 15-30 seconds is the time taken for the
fuel pump to re-prime the line.
Has your gas mileage noticeably dropped recently?
Your fuel pump has two power sources. The first kicks in when you turn
the key on; this pressurizes the fuel lines. When the key is turned to
Start, the first power source kicks out and the second source kicks in.
Ehen the first power source is no longer available, the other
Sorry, hit Send Icon by accident.
Anyway, the problem may be the startup pressurizing power source, which
means the other power source has to pressurize the lines before the
vehicle will start. Once the vehicle has started, the lines are
pressurized and will remain that way for several hours, so each start
after the first start of the day is easy.
Uhhh, two power sources? My diagrams for that year show pump power
coming directly from fusible link "T", through the fuel pump relay, then the
inertia switch. No "second" source.
Perhaps you mean the ECC gets its "run the pump" signal from different
from the EEC power relay to pins 37 & 57 (also powers injectors, IAC, solenoids,
when the key is at "on", plus from the ignition switch directly to pin 30 at
The computer decides when to ground the FP relay, allowing power to the pump.
Turn the key "on", it powers the pump, doesn't see the engine running, so shuts
Turn to "start", pin 30 says "I don't care if the engine's not running, turn on
For that, I'd be looking at either a poor connection at either end of the
wire that goes to pin 30 (maybe even a broken wire), or a bad ignition switch.
Ford? Bad ignition switches?? No way!! Of course, there were "a few" cars
recalled because of defective switches. 7 million or so, I think it was.
Google: ford ignition switch fire
Thanks for all the replies!
Using the info given here and a little experimenting I am leaning
towards a fuel pump problem starting.
Still, being a layman, this is a simple test I did.
First let me say that the fuel filter has less than 500 miles on it.
This morning I turned the key on and as always I hear the fuel pump
start and stop. then I just floored the gas pedal once, which of
course I never do with the EFI, but by doing this, then I started the
car. This time the first start of the day was instant. This was the
only thing I changed since I started having the hard first crank of
the day problem.
By doing this to avoid the problem does it point to the problem being
the fuel pump?
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