New Battery - Won't Start

[crouse]

My 7 year old battery wouldn't hold a charge so I replaced it today. The engine turns over but will not fire. I don't hear the fuel pump when I turn the key to the On position. I checked the 20 amp fuse in position 5 and it's not blown. I swapped the fuel pump relay in position 203 with the A/C clutch relay in position 204 without success. The fuel pump shut-off switch in the trunk is not tripped. It wouldn't hardly turn over on Monday evening, so I charged it for about a hour then it started and ran just fine. Today I tried to start it and it turned over a few times and then the battery was dead. What else can I check? I can't believe the fuel pump would fail just like that. I've got about 118,000 miles on it. Thanks, Curt

[ChiTownMaraud3r]

Possible the alternator isn't charging the battery when it is on. Jump it and measure voltage across the positive and chassis.

[Comin' in Hot]

If you have a boost-a-pump there should be a fuse near it, I’ve had one blow and the fuel pump won’t run.

[crouse]

No Boost-A-Pump. I'm not supercharged.

[crouse]

When I crank the engine, the red light on the dash lights up solid red. I've never noticed this before. Is it possible the PATS system is at fault?

[BAD MERC]

Solid red is good. Rapid flash is bad key. Check fuel pump inertia switch in trunk. Try to start with a shot of starting fluid. That will rule out a fuel issue.

[crouse]

The fuel shut-off in the trunk is not tripped. I don't hear the fuel pump when I turn the key to the ON position. Not sure if the PATS system is the problem or if the fuel pump failed. Probably have it towed to my local Ford dealer.

[lji372]

The fuel shut-off in the trunk is not tripped. I don't hear the fuel pump when I turn the key to the ON position. Not sure if the PATS system is the problem or if the fuel pump failed. Probably have it towed to my local Ford dealer.

Don’t be afraid to give the bottom of the trunk a punch or two. Yes it got mine going and let me know it was the problem.
Thanks again spectragod! :bows:

[TexasMotorhead]

Did you know there is a fuel pump driver module in the trunk right by the cutoff switch. I just replaced mine, $237.39 from Joe Myers Ford in Houston. It was the only one in the city!...

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[TexasMotorhead]

I might add that this part is not shown in the shop manual, alldatadiy.com, NOR in Ford's parts database as part of the fuel system. It is listed as a trim piece in the trunk... The superb parts guy at Joe Myers did some extra work to figure that out...

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[Agent2006]

Ugh.

118,000 miles...original fuel pump ?......

hopefully you have 1/2 tank or less of gasoline...or it's a splashy, messy job.

[tbone]

FPDM is the easiest and cheapest place to start. Then the fuel pump if no whirring is heard. Replacing both wouldn't be the worst idea.

[tbone]

Did you know there is a fuel pump driver module in the trunk right by the cutoff switch. I just replaced mine, $237.39 from Joe Myers Ford in Houston. It was the only one in the city!...

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Used ones go for $35 or so on ebay and usually work just fine. A modded one for high flow fuel pumps go for $120. 1 year warranty.

[crouse]

So I had my Marauder towed to a local shop on Monday evening. They were really busy and finally got to it on Thursday. They said it fired right up for them several times during the day.

Now what?

Like I mentioned in one if my posts, when I cranking the engine, the red light on the dash lights up solid red. I've never noticed this before. Is it possible the PATS system is at fault? Then after I disconnected the battery over night then cranked the engine the next day, the light did not come on.

[Agent2006]

...I believe the PATS codes need to be read by a special reader at the dealer.....

From the explorerforum.com :

Antitheft and Alarm Systems: Description and Operation
ANTI-THEFT
The passive anti-theft system (PATS) uses radio frequency identification technology
to deter a driveaway theft. Passive means that it does not require any activity from
the user.

The PATS uses a specially encoded ignition key. Each encoded ignition key contains a
permanently installed electronic device called a transponder. Each transponder
contains a unique electronic identification code, with over 72 million billion
combinations.


Each encoded ignition key must be programmed into the vehicle powertrain control
module (PCM) before it can be used to start the engine. There are special diagnostic
procedures that must be carried out if new encoded ignition keys are to be
configured.

The encoded key is larger than a traditional ignition key. The key does not require
batteries and should last the life of the vehicle.

The transceiver module communicates with the encoded ignition key. This module is
located behind the steering column shroud and contains an antenna connected to a
small electronic module. During each vehicle start sequence, the transceiver module
reads the encoded ignition key identification code and sends the data to the PCM.
The control functions are contained in the PCM. This module carries out all of the
PATS functions such as receiving the identification code from the encoded ignition
key and controlling engine enable. The PCM initiates the key interrogation sequence
when the vehicle ignition switch is turned to ON or START.

The PATS function uses the PCM to enable or disable the engine. All elements of PATS
must be functional before the engine is allowed to start. If any of the components
are not working correctly, the vehicle will not start.

PATS uses a visual theft indicator located on top of the instrument panel. This
indicator will prove out for three seconds when the ignition switch is turned to ON
or START under normal operation. If there is a PATS problem, this indicator will
either flash rapidly or glow steadily (for more than three seconds) when the ignition
switch is turned to ON or START. PATS also "flashes" the theft indicator every two
seconds at ignition OFF to act as a visual theft deterrent.

The PATS is not compatible with aftermarket remote start systems, which allow the
vehicle to be started from outside the vehicle. These systems may reduce the vehicle
security level, and also may cause no-start issues. Remote start systems must be
removed before investigation of PATS-related no-start issues.

The PATs key is used on the following Ford family trucks and suvs:

[crouse]

So I wonder if over the course of two days sitting at the shop something reset?

PATS uses a visual theft indicator located on top of the instrument panel. This
indicator will prove out for three seconds when the ignition switch is turned to ON
or START under normal operation. If there is a PATS problem, this indicator will
either flash rapidly or glow steadily (for more than three seconds) when the ignition
switch is turned to ON or START. PATS also "flashes" the theft indicator every two
seconds at ignition OFF to act as a visual theft deterrent.

[justbob]

When my PATS went out many years ago it caused a no crank situation and left me stranded. Disabled now..


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[Agent2006]

see I think justbob hit the nail on the head - PATS = no crank. Thoughts, MM gang?

PATS went out many years ago it caused a no crank situation and left me stranded. Disabled now..

[Dragcity]

Fuel pump is my vote. When it fails, it can stay failed for hours or days. Then, comes back to life, then fails again any time it wants.

This happened to me several years ago at about the same miles you have. Odly, my Brother has an 03 Marauder with only 5,000 miles on it. His failed last year also. Same symptoms.

Moral of the story, our fuel pumps have a limited life.

[crouse]

Well, it's been starting just fine since mid February, but last night it wouldn't start. I'm not hearing the fuel pump when I turn the key to the On position. So probably going to replace the fuel pump. I'm assuming I should get a Ford fuel pump?

[Turbov6Bryan]

I sell these fuel pump driver modules on eBay for 29.00 shipped

Same user name as here

I would look on Rockauto for a replacement fuel pump

[crouse]

I see that Tasca Ford lists the entire fuel pump assembly for $325.

Fuel Pump Assembly - Ford (3W1Z-9H307-AB)

Does anyone have a part number for just the fuel pump? Or should I get the entire unit?

Thanks,
Curt

[crouse]

If anyone has replaced the fuel pump themselves, I'd be interested in any information about the install. I have about a half tank of gas. Do I need to siphon more fuel out?

[crouse]

I sell these fuel pump driver modules on eBay for 29.00 shipped

Same user name as here

I would look on Rockauto for a replacement fuel pump

Can you send me a link to this fuel pump driver module? And where is it located on the car?

[RubberCtyRauder]

https://www.mercurymarauder.net/forums/showthread.php?t=86200

[Agent2006]

Like the others said Rock Auto. The pump itself is as cheap as 23 bucks, but if you never wanna do this again, I'd spring for the Delphi at $162.

https://www.rockauto.com/en/moreinfo.php?pk=5929674&cc=1387829&jsn=399

1/2 tank there will be gas everywhere, a gallon or two. siphon if you can or prepare to catch some gas.

This takes about an hour....

thoughts...
1.go in from the right rear tire area. clean off the area around the fuel pump hole with a cloth if there's a bunch of road grime/crud.
2.unbolt the right exhaust rear hanger and let it dangle. may want to strap it /pull it over for more room, I never did that.

--jack up the car from the frame you want the rear axle to dangle down not in the way.


3.you can hit the fuel pump shut off button and crank the engine if you want to relieve pressure. but with a dead pump might not have any in there to begin with. Get the fuel pump disconnector tool before you start. (I think it is 5/16" dia for a Ford. )

4.toughest part = unhooking the fuel tank pressure connector at the right front corner above the tank. ZERO clearance there.

5.make sure the hat gasket nibs are pulled through and the gasket is flush against the ring. On my Delphi it already was.
6.un bolt the old fuel pump, think it is 8mm, I wouldn't use any electric tools do it by hand.
7.when you start loosening the hat bolts, you'll see fuel start to leak out, get your drain pan under there,
8.new fuel pump has connector/harness for the fuel tank pressure sensor, plug/play just route the lines. I left some of the old line up there. Use a zip tie to secure the new line on the side of the tank.
9.make sure you don't bend the float arm on the way into the tank.
10.make sure if the tank float arm was secured for shipping with a twist tie or zip tie, take that off before the install.
11.torque the hat ring evenly.
12.watch for leaks next fill up.

[crouse]

Thank you for the detailed information.

[crouse]

Rock Auto shows a bunch of fuel pump assemblies. Some that seem to be good are Airtex, Carter, Bosch and Delphi? Anyone have any suggestions? Or should I buy the Motorcraft from Tasca Ford for $325?

[Agent2006]

My advice is to avoid the Autobest. I installed that one and the sending unit was bad, so I got to swap fuel pumps twice. Heard Airtex is a short lived pump but no first hand experience. I got a Delphi, a whole 2,000 miles on it so far so good.

[crouse]

Thanks for the insight.

Guess what. It started just fine a short time ago when I had it flat-bedded from the shop that was going to charge me $800 to replace the pump. Now that it's home, I think I'll do some quick looking for corrosion or anything else that might cause this intermittent issue. If I don't find anything, I'll replace the pump with a Delphi.

[Agent2006]

Good luck! ugh $800 bucks..you can do it yourself for $165...hmmmm what to do with the leftover $635?

Marty tuner
cat-back exhaust
aftermarket sound system....
sway bars.....

[crouse]

If the fuel pump is failing, wouldn't it fail while the engine is running? Or once it's running it will stay running until you shut off the engine?

[fastblackmerc]

If the fuel pump is failing, wouldn't it fail while the engine is running? Or once it's running it will stay running until you shut off the engine?

If the fuel pump is bad then it's bad ALL the time.

[crouse]

My issue must be something else then.

[BLACKMARAUDER04]

My fuel pump would work till it got hot, let’s say a 40 minute freeway drive. It would die when I had to stop. The next day it would work again. Changed fuel pump power module from junk yard for $6.57. Same thing happened. Replaced with a Delphi unit. Guy charged me $540 inc diagnose. Car has been fine since.


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