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My 2003 Mach 1 Won't Start
#1
Sorry in advance if this is the wrong category to put this in. I tried the "03/04 Mach Registry" site but it seems dead so I'm back here where I usually ask for help about my 71 mach..
EDIT: I see there is a different subforum for "Other Years" which I somehow rolled right over. Doh!

I have a 2003 Mach with the 4.6L DOHC engine and it won't fire up, it cranks/turns over though.
I went through the usual checklist:

-New battery

-Checked fuel system: Pump works when I put the key in "on" position in ignition. Fuel filter is clean and relay is working properly.
-Replaced spark plugs and checked each one for spark which gives a blue fat spark every time
-Compression test checks out evenly across all cylinders
-Alternator is working normally
-Tried using starter fluid but no results

I haven't physically checked the starter yet since I will have to jack the car up and need to borrow a jack later tonight.
So this makes me think its possibly either the starter or my anti theft system (stock).
I read online that this is probably because the PATS anti theft system took a random crap and isn't allowing the car to actually fire up even though it cranks.
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#2
You need to borrow, or buy, an OBD II scan tool. The prices have come way down and decent ones can be bought for $50-$60. Chuck
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#3
Cranks turns over = not the starter

Does the '03 have a crank sensor? I had a crank sensor go bad once and it was like someone turned off the ignition.

+1 on the OBD II scan tool. Until Ford installs a Ctrl+Alt+Del button a code reader will be your best friend.

Bob

Tachs, Voltmeters, Headlight kits, Wiper delays and more at
[Image: smlogo.jpg]
Rocketman's Classic Cougar (and Mustang) Innovations, LLC
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#4
Yes they have crank sensors I will go get a OBD II scanner tomorrow hopefully its a sensor. My theft light blinks super rapid but turns off when i have they key in the on position. I don't know if that means PATS is broken but only a scanner will tell. thanks for the advice
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#5
i don't mean to pull u away from our forum but the folks on this site have a good number of late model of info.
http://www.hotrodders.com/
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#6
My son's 2002 GT did the same thing
Cranked, theft light flashed rapidly
Everyone said PATS was bad
At one point I decided to swap batteries with my truck.
Started right up - his battery was just weak - car seemed to crank fine, just wouldn't fire ???
I do remember you could smell fuel when cranking.

Is the new battery you got fully charged?
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#7
Somehow it was the MAF sensor. I got it to start pretty much by playing rough with the gas pedal but it would stall driving down the street. So I got a obd II scanner read the code and it was MAF sensor failure. I put it in today (super easy) and now it runs and accelerates better than it has in a while.  Chin
[+] 1 user Likes icejawa's post
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#8
Excellent. Glad it was an easy fix.

Bob

Tachs, Voltmeters, Headlight kits, Wiper delays and more at
[Image: smlogo.jpg]
Rocketman's Classic Cougar (and Mustang) Innovations, LLC
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