[Shotimes] engine stumbling

[Ian Fisher]

I believe that the OEM pumps are walbros. I put a 190
in my atx, 1 in my mtx and I bought a 155 to replace
my 190 when I put the 3.2 in. I never had problems
with any of them..

Ian

--- Leigh Smith <leighsm@comcast.net> wrote:

> I think not wires, they would miss most when things
> are lean, like warm
> idle, or especially 2200-3000 rpm, light throttle.
> Not hard running. Save
> your money.
> I sauspect fuel pump. That describes the exact
> symptoms I had when mine died
> at about 180k.
> Three years doesn't sound like long for a fuel pump.
> Both my stock ones
> lasted 10 yrs.
> Anyone else with a Walbro pump have any comments on
> how long they last
> before I put the one on my bench into my car?
> Lee
> 
> ----- Original Message ----- 
> From: "Co-Op" <Co-Op@SchrammInc.com>
> To: <shotimes@autox.team.net>
> Sent: Wednesday, August 03, 2005 8:13 AM
> Subject: [Shotimes] engine stumbling
> 
> 
> > Essentially what happens is, when I accelerate
> past 4k, the engine starts
> to
> > stutter.  This happens almost every time.  It is
> not an intermittent
> problem
> > Normally, when the car is cool like after leaving
> work for the day, or
> > departing in the morning, the car will act fine
> for a few minutes then
> > stutter after all fluids are up to temp.  I do
> have a feeling, while it is
> > stuttering, of a loss in power.  RPMs will still
> increase, but not as fast
> > as normal.
> >
> >  This problem first started on the way home from
> Indy.  I decided to go
> WOT
> > at some point near the WV/PA border.  I got to 95
> or 100 an engine started
> > to stutter.  I figured that I had a tank of bad
> gas since we had filled up
> > at some point in OH.  I believe that the fuel was
> an ethanol mix, and the
> > Sunoco station that we stopped at was sorta'
> remote.  I have run 25
> gallons
> > through the car since then and have treated the
> system to a bottle of
> > Techron.
> >
> > I have been swapping out what parts I can.  TPS
> swap, no change.  DIS
> > module, no problem.  Coil pack, discovered that
> there are different ones
> out
> > there.  I don't have a spare that will work. 
> Spark plugs, no effect.  LPM
> > is tight and secure.  Battery is good.  I wanted
> to check fuel pressure,
> but
> > I could not find the adapter for our gauge.  No
> codes.  Cylinder balance
> > test was fine.
> >
> > I haven't yet, but I will be checking voltages at
> the battery in the
> trunk,
> > cables near the alternator, and on the alternator.
>  Is there a way to
> check
> > to see if there is enough current getting to the
> plugs?  The ones that
> came
> > off the car looked great, so I can't see an issue
> there.
> >
> > I'm really at a loss for finding a solution.  My
> father and I are thinking
> > that the fuel pump may be going out.  Once I find
> the rest of our pressure
> > gauge, I will verify that I have good KOEO, idle,
> high rpm cool, and high
> > rpm hot fuel pressure.  The fuel filter is less
> than a month old, while
> the
> > pump is nearing in on 3 years.  I'm fairly certain
> that it is a Walbro
> > 155lph piece.
> >
> >  I have ordered new Motorcraft plugs, Accel wires,
> and a Federal-Mogul
> fuel
> > pump from RCM Automotive.  Should be here on
> Thursday.
> >
> >
> > Mike Bruce
> >
> > p.s. Yes, It does seem like I post a new problem
> every few weeks.  I deal
> > with it.
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