Acceleration having a little problems. - 2003-04 Mach 1 Registry Owners Club

Fubars Mach 1 · 06-04-2009, 11:32 PM

My mach seems to be having a technical problem. I think i either have a spark problem or a fuel problem. It just started getting hot here in myrtle beach, and i have been noticing my car is doing something strange. When i step floor my car, it seems to be like, dying. During acceleration, it starts popping really fast, and barely goes anywhere, then all of a sudden it kicks in, and goes about 1500rpms faster, then starts popping again really fast, then goes again for another 1500rpms or so. but, i can sit in a parking lot and rev it up with out a problem. But at night, when its cool out, i dont have a problem at all. Any help with this can be awesome, and ask me any questions you need to know. Thanks guys

Screaming04 · 06-05-2009, 01:23 PM

Have you tried with the traction control off?

one mach 1 · 06-05-2009, 05:24 PM

Quote:

Originally Posted by Fubars Mach 1

My mach seems to be having a technical problem. I think i either have a spark problem or a fuel problem. It just started getting hot here in myrtle beach, and i have been noticing my car is doing something strange. When i step floor my car, it seems to be like, dying. During acceleration, it starts popping really fast, and barely goes anywhere, then all of a sudden it kicks in, and goes about 1500rpms faster, then starts popping again really fast, then goes again for another 1500rpms or so. but, i can sit in a parking lot and rev it up with out a problem. But at night, when its cool out, i dont have a problem at all. Any help with this can be awesome, and ask me any questions you need to know. Thanks guys

how many miles on it? Might change the fuel filter it being the cheapest. You can look at your spark plugs for free to see if they are fouled out. Might want to consider changing those. Do you have a MIL on? Check all your vacuum hoses as well. Hope this helps.

drboyd · 11-10-2009, 12:08 AM

I think I'm having a version of the same problem. I've replaced the fuel filter, changed the spark plugs, and cleaned the air filter; it's better, but it ain't gone. No codes in the computer; the MIL is not on.

Did you ever figure out what it was?

drboyd · 11-10-2009, 12:36 AM

Even without the MIL on? Hmmm!!!

Quote:

Originally Posted by Mach1Marauder

Really?

If you're still in Phoenix, come by the shop and talk to us about your problem and lets listen to your car.
Sounds like it could be the the fuel rail pressure sensor.

UmachnMe? · 11-10-2009, 09:17 AM

We just changed the fuel rail pressure sensor on my buddy's cobra and fixed the exact same problem. He was a happy camper for this simple solution.

Live Life Fresh · 01-19-2010, 02:43 AM

Hey Fubars and DRBoyd, did you guys have any luck with the fuel rail pressure sensor replacement?! My Mach is having the same stuttering/popping case under 1/2 to full throttle. Changed spark plugs, fuel filter, air filter and its at 39k right now. Just really starting to bum me out so I'm hoping you guys had some luck with the sensor, i'd definitely give it a try if I hear of some positive results from it

drboyd · 01-19-2010, 07:47 PM

How much is the part and how difficult is it to change?

Quote:

Originally Posted by UmachnMe?

We just changed the fuel rail pressure sensor on my buddy's cobra and fixed the exact same problem. He was a happy camper for this simple solution.

2k4mach · 01-19-2010, 07:55 PM

if you guys pull your dipstick and sniff the oil on it...........if it smells strong with gasoline its a pretty sure bet its the FRPS.

UmachnMe? · 01-20-2010, 07:35 AM

Quote:

Originally Posted by drboyd

How much is the part and how difficult is it to change?

He went and bought it from Ford and I think he said it was about $40.

UmachnMe? · 01-20-2010, 07:36 AM

Quote:

Originally Posted by 2k4mach

if you guys pull your dipstick and sniff the oil on it...........if it smells strong with gasoline its a pretty sure bet its the FRPS.

Check your PM please....

06-04-2009, 11:32 PM	#1
Fubars Mach 1 Leading the Pack Join Date: Dec 2005 Location: Myrtle Beach, SC Posts: 261	Acceleration having a little problems. My mach seems to be having a technical problem. I think i either have a spark problem or a fuel problem. It just started getting hot here in myrtle beach, and i have been noticing my car is doing something strange. When i step floor my car, it seems to be like, dying. During acceleration, it starts popping really fast, and barely goes anywhere, then all of a sudden it kicks in, and goes about 1500rpms faster, then starts popping again really fast, then goes again for another 1500rpms or so. but, i can sit in a parking lot and rev it up with out a problem. But at night, when its cool out, i dont have a problem at all. Any help with this can be awesome, and ask me any questions you need to know. Thanks guys __________________ 03 OX Mach 1 I have never missed a shift AUTOMATIC FTW! Ok, nevermind... Got a T-56 Now, and I miss a lot of shifts hahaah

06-05-2009, 01:23 PM	#2
Screaming04 old timer Join Date: Aug 2004 Location: Langley, BC Posts: 1,889	Re: Acceleration having a little problems. Have you tried with the traction control off? __________________ Sold: Screaming Yellow Intercooled 2.1 KB 5speed Mach 1 running a measly 8psi

11-10-2009, 12:08 AM	#4
drboyd Official Old Phart Join Date: Jul 2004 Location: phoenix, az Posts: 182	Re: Acceleration having a little problems. I think I'm having a version of the same problem. I've replaced the fuel filter, changed the spark plugs, and cleaned the air filter; it's better, but it ain't gone. No codes in the computer; the MIL is not on. Did you ever figure out what it was? __________________ 2004 DSG 5 Speed - IUP Gauge Trim Rings Sequential Turn Signals Tri-Ax Shifter Trunk Lid Mat K&N Filter in stock housing with silencer removed Blinder M20 Borla Stinger Catback Compass - Temperature Mirror Bi-Xenon Headlamps Embroidered Headrests

11-10-2009, 09:17 AM	#6
UmachnMe? never ending project Join Date: Dec 2003 Location: Columbia, SC Posts: 605	Re: Acceleration having a little problems. We just changed the fuel rail pressure sensor on my buddy's cobra and fixed the exact same problem. He was a happy camper for this simple solution. __________________ tuned by ProDyno in Fort Mill 540 hp (5200 rpm) 490 tq I/W 15% OD pulley Vortech V2SQ forged S/B by VT performance Cobra tank with twin GT pumps BBK Long Tubes, custom O/R X w/ magnaflow mufflers 18"x9" AFS Mach 1 wheels Dimpled and slotted rotors MM front coil over kit with Bilstein HD struts MM adjustable LCAs and adjustable pan hard bar MM hd torque arm /removed factory upper arms Rebuilt 3650 / new syncros and shifter forks / Hurst BP RAM HD 950 dual disk clutch and FRP alum d/s Last edited by UmachnMe?; 11-10-2009 at 09:17 AM. Reason: being specific

01-19-2010, 02:43 AM	#7
Live Life Fresh Registered User Join Date: Jul 2009 Location: Los Angeles, CALI Posts: 156	Re: Acceleration having a little problems. Hey Fubars and DRBoyd, did you guys have any luck with the fuel rail pressure sensor replacement?! My Mach is having the same stuttering/popping case under 1/2 to full throttle. Changed spark plugs, fuel filter, air filter and its at 39k right now. Just really starting to bum me out so I'm hoping you guys had some luck with the sensor, i'd definitely give it a try if I hear of some positive results from it

01-19-2010, 07:55 PM	#9
2k4mach LuLz Join Date: Dec 2003 Location: Cedar Park, TX Posts: 19,294	Re: Acceleration having a little problems. if you guys pull your dipstick and sniff the oil on it...........if it smells strong with gasoline its a pretty sure bet its the FRPS. __________________ 11 Sterling gray GT500 coupe 08 Silver Z06 1058rwhp/1073rwt @ 15psi 14 Silver Q50S Vortech blown 04 DSG Mach 1 (stolen) 03 OW Mach 1 (sitting in a field rotting away)

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