Sputtering problem

2000Mustang · February 10th, 2009, 07:37 PM

My 1998 GT sometimes sputters under WOT. The car is warmed up, but not running hot. It doesnt do it all the time either. It KILLS the upper rpm power. It seems to cut in and out, sputter. I dont even know where to start with this. Any suggestions? FYI: I recently changed the plugs, wires.

2000Mustang · February 10th, 2009, 08:01 PM

Advancer is wobbly... what that mean?

97S281 · February 10th, 2009, 08:22 PM

Originally Posted by PAzYearazzUP

Dirty air cleaner? did you see if the advancer is wobbly? Could be jumping at high rpm.

97S281 · February 10th, 2009, 08:23 PM

have you changed the fuel filter recen......ever?

Traidmarx · February 10th, 2009, 08:55 PM

Originally Posted by PAzYearazzUP

Dirty air cleaner? did you see if the advancer is wobbly? Could be jumping at high rpm.

i'm with you guys on that one....

maybe he was thinking of harmonic balancer or somethin....

have you had the fuel pressure tested...its possible thatthe pump could be going bad and at higher rpm's the pump just can't keep up with the injectors, or like someone else said maybe the fuel filter.

i started having the same problem with mine about a month ago doing that and last week got to the point that it wouldn't start.

Lefty · February 10th, 2009, 09:08 PM

Originally Posted by 97S281

I know, I know

JohnC · February 11th, 2009, 03:44 AM

I'm going to lean towards the fuel pump crapping out.

G.T. Rags · February 11th, 2009, 05:31 AM

my car did this at WOT when my NPI intake manifold was cracked

February 10th, 2009, 07:37 PM	#1
2000Mustang Enthusiast 1998 Mustang GT Join Date: Dec 2006 Location: Kansas City, MO Posts: 561 iTrader: 0 reviews	Sputtering problem My 1998 GT sometimes sputters under WOT. The car is warmed up, but not running hot. It doesnt do it all the time either. It KILLS the upper rpm power. It seems to cut in and out, sputter. I dont even know where to start with this. Any suggestions? FYI: I recently changed the plugs, wires. __________________ Off-road X pipe, Magnaflow mufflers, BBK cai, 3.73 gears, ZEX 75 shot (not hooked up), 17in. Bullitts, lowered

February 10th, 2009, 08:01 PM	#2
2000Mustang Enthusiast 1998 Mustang GT Join Date: Dec 2006 Location: Kansas City, MO Posts: 561 iTrader: 0 reviews	Advancer is wobbly... what that mean? __________________ Off-road X pipe, Magnaflow mufflers, BBK cai, 3.73 gears, ZEX 75 shot (not hooked up), 17in. Bullitts, lowered

February 10th, 2009, 08:23 PM	#4
97S281 Rollin' 18/ pushin' 2 1997 Saleen S281 Join Date: Feb 2007 Location: Zebulon N.C. Posts: 6,259 iTrader: 13 reviews	have you changed the fuel filter recen......ever? __________________ MODS IN GARAGE NCMM ORIGINAL BLOWN 96-98 CREW MEMBER # 1

February 11th, 2009, 03:44 AM	#7
JohnC Enthusiast 1997 Mustang GT 13.56@102.94 Join Date: Oct 2007 Location: Murfreesboro and Old Hickory, TN Posts: 722 iTrader: 1 reviews	I'm going to lean towards the fuel pump crapping out. __________________ 1997 Mustang GT Aluminum Block PI swap & 4R70W to TR3550 swapped. Best 1/8: 2.04 60ft 8.74@81.85 & Best 1/4: 2.045 60ft 13.56@102.94 all on stock 245-17's My Garage

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