5.0 mustang low RPM miss

Coupe50h · 01-08-2007, 10:17 PM

Any mods?
If you have aftermarket rockers, adjustment could be out, you could be losing compression? just a guess.

Also, sounds ignition related, but it could be a weak fuel pump, you need to be sure your getting fuel pressure.
And that you dont have a defected coil, even if it's new.
Check engine grounds, and see if you can run a code scanner, and pull codes. could be a number of things, clean the maf, i dont care if it's new, and make sure all injectors are squirting.
good luck..

Unit 5302 · 01-09-2007, 07:07 PM

Is it an audible misfire (backfire?) Does it clear itself out after a few pops?

Either one of those scenarios sound you could have a broken or failing fuel injector.

01-08-2007, 10:17 PM	#1
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Re: 5.0 mustang low RPM miss Any mods? If you have aftermarket rockers, adjustment could be out, you could be losing compression? just a guess. Also, sounds ignition related, but it could be a weak fuel pump, you need to be sure your getting fuel pressure. And that you dont have a defected coil, even if it's new. Check engine grounds, and see if you can run a code scanner, and pull codes. could be a number of things, clean the maf, i dont care if it's new, and make sure all injectors are squirting. good luck.. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

01-09-2007, 07:07 PM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Re: 5.0 mustang low RPM miss Is it an audible misfire (backfire?) Does it clear itself out after a few pops? Either one of those scenarios sound you could have a broken or failing fuel injector.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Safety Issue 64 - 70 Mustangs	Mach1 Cobra Jet	Classic Mustangs	20	07-11-2005 08:06 PM
Edelbroock RPM head on a 393	Redge	Windsor Power	3	06-22-2005 10:55 PM
I NEED HELP! OK a REAL 1976 Mustang II suspension on a 65 Mustang coup!	Raymond56	Classic Mustangs	1	06-15-2005 06:01 PM
t-5, is it the same in the 4 cylinder and V8	ex-lt1-guy	Windsor Power	12	03-03-2002 01:59 AM
89-Mustang pulling trailer -vs- 2000 Mustang	Five0	Stang Stories	7	04-01-2001 02:50 AM