93 Chrysler 3.8 Fuel Bar Pressure

Our 93 Chrysler New Yorker 5th Ave. has 150K miles. Runs great except
starting first thing in the morning. Must give it the 1,2,3 then crank
and it starts. Good for the rest of the day. What is the cause for the
loss in fuel pressure in the fuel bar?? How can this problem be
solved?? Bob

On Mon, 7 Feb 2005, Bob Hewitt wrote:

> Our 93 Chrysler New Yorker 5th Ave. has 150K miles. Runs great except
> starting first thing in the morning. Must give it the 1,2,3 then crank
> and it starts. Good for the rest of the day. What is the cause for the
> loss in fuel pressure in the fuel bar??

Faulty fuel pump outlet check valve and/or faulty fuel pressure regulator
and/or leaking injector(s).

> How can this problem be solved??

Diagnosis and repair.

I've got a 93 3.3 and am having the same problem, I think. With mine, I
have to turn the key completely off and then back on 1 or 2 times and then
it starts. Is that what you have to do also ?

I've replaced both my fuel pump (went out on vacation) and fuel rail, which
included the pressure regulator (the rail sprung a leak).

Is there any way to check the injectors other than pulling the rail and
looking at each one ?

thanks,
Nick

"Daniel J. Stern" > wrote in message
.umich.edu...
> On Mon, 7 Feb 2005, Bob Hewitt wrote:
>
>> Our 93 Chrysler New Yorker 5th Ave. has 150K miles. Runs great except
>> starting first thing in the morning. Must give it the 1,2,3 then crank
>> and it starts. Good for the rest of the day. What is the cause for the
>> loss in fuel pressure in the fuel bar??
>
> Faulty fuel pump outlet check valve and/or faulty fuel pressure regulator
> and/or leaking injector(s).
>
>> How can this problem be solved??
>
> Diagnosis and repair.



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On Mon, 7 Feb 2005, ncs wrote:

> Is there any way to check the injectors other than pulling the rail and
> looking at each one ?

Not so much "looking" as wrapping the squirter end of each injector in a
tight twist of paper towel and coming back the next AM to see if any of
the wads of paper towel smell of gasoline.

ok, thanks for the tip. Didn't want to take the plenum off and pull the
rail, but if that's what it takes, I gotta do it.

I was also thinking of putting a pressure gauge on the test port of the
rail, note the pressure, leave it on overnight and then check it in the
morning.

thanks again,
Nick

"Daniel J. Stern" > wrote in message
.umich.edu...
> On Mon, 7 Feb 2005, ncs wrote:
>
>> Is there any way to check the injectors other than pulling the rail and
>> looking at each one ?
>
> Not so much "looking" as wrapping the squirter end of each injector in a
> tight twist of paper towel and coming back the next AM to see if any of
> the wads of paper towel smell of gasoline.



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install a fuel pressure gauge. start vehicle and let idle for two minutes
then shut the engine off
monitor fuel pressure. if the fuel pressure drop more than 15 psi with
20-30 mins the check valve
inside the fuel pump is no good and therefore pump must be replace. if
pressure is dropping very slowly and it takes the next morinng to loose 10
psi your injectors may be leaking. but most of the time its your fuel pump

On Mon, 7 Feb 2005, ncs wrote:

> ok, thanks for the tip. Didn't want to take the plenum off and pull the
> rail, but if that's what it takes, I gotta do it. I was also thinking of
> putting a pressure gauge on the test port of the rail, note the
> pressure, leave it on overnight and then check it in the morning.

That works to tell you you're losing pressure (duh, you already know
that!), what you need to do is figure out *where*.

> > Not so much "looking" as wrapping the squirter end of each injector in
> > a tight twist of paper towel and coming back the next AM to see if any
> > of the wads of paper towel smell of gasoline.

Nick, We have the same problem. I have to shut off the key 3 times for
it to start. Placed pressure gage on Fuel Bar and did not loose
pressure in 15 minutes. Next step is to leave gage on over night to see
how much it drops. Running pressure is up to 50 psi. Engine runs too
smooth to be a fuel pump problem. Bob

Thanks Bob and tdodge, based on everyone's tips and help, it looks like the
injectors might be the problem. Coming home from Florida in August, our
fuel pump went out. I had it replaced at a Dodge dealership in Lake Norman.
So I think I can rule out the pump. The rail was replaced earlier in the
spring because it sprung a leak. I replaced the ASD and fuel pump relays
and the coolant temperature sensor.

So I'll check the fuel pressure next.

thanks again,
Nick

"Bob Hewitt" > wrote in message
...
> Nick, We have the same problem. I have to shut off the key 3 times for
> it to start. Placed pressure gage on Fuel Bar and did not loose
> pressure in 15 minutes. Next step is to leave gage on over night to see
> how much it drops. Running pressure is up to 50 psi. Engine runs too
> smooth to be a fuel pump problem. Bob
>



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On Tue, 8 Feb 2005, ncs wrote:

> Thanks Bob and tdodge, based on everyone's tips and help, it looks like the
> injectors might be the problem.

Pick up a set of matched-flow replacement injectors from the "injector
guru", www.lindertech.com .

> So I think I can rule out the pump. The rail was replaced earlier in the
> spring because it sprung a leak.

Aside from actual fuel supply line leaks, the injectors are pretty much
the only leakdown point left!