Getting some hesitation..?

89FoxbodyGT · June 22nd, 2011, 11:04 PM

I'm new to the board, so whats up everyone?

Anyway. My 89 5.0, I've only had it for a couple months now, but here within the last few days I've been getting some hesitation when I accelerate, I figured it was some water in the fuel lines so I put a little bit of rubbing alcohol in my gas tank.

It stopped for a couple days, but now it came back.

So I'm assuming that it isn't water in the fuel lines because I haven't filled up since then, so could it be the spark plugs?

I don't think the Intake timing is off. What else could it be that's causing this?

00MustangGtPremium · June 22nd, 2011, 11:19 PM

It could be many things. What exactly do u mean by hesitation and when exactly does it happen? ( like as soon as u hit the gas or while accelerating)

89FoxbodyGT · June 22nd, 2011, 11:24 PM

It happens as I'm accelerating, like I can feel it kind of cut out as I'm going down the road, not like it should. Not full on lose power, but like it kind of jumps a little.

1988 convertible · June 23rd, 2011, 02:33 AM

if you let the car warm up it wouldnt be the plugs as that would only happen with old plugs on a cold start...

is that gradual acceleration from what your experiencing the issue or full on throttle?

00MustangGtPremium · June 24th, 2011, 01:24 PM

It sounds like a dying battery, bad fuel pump, or dirty fuel injector ( Im not sure about the last one). Im leaning towards the battery.

PsyAbe · June 24th, 2011, 01:53 PM

Perform some routine maintenance first. Also, there's a great chance you have to get your EGR valve replaced. A faulty one makes its presence most visible during acceleration and is known to cause jerks and hesitation when flooring the pedal. For good measure check your dizzy and its cap, that can also cause bad acceleration

ntilehman · June 24th, 2011, 04:10 PM

i would go for plugs, wires, cap, coil, and fuel system. look at the fuel filter to see if it needs replacing. they can clog up. if none of it has been done in a while i would say go for it all. a lot of intermittent surging can be the ignition system.

flattusmaximus78 · June 24th, 2011, 07:23 PM

Damn guys be real. Scan for codes first.

FastStang91Lx · June 25th, 2011, 09:07 AM

Sounds like another case of the blind leading the blind.

flattusmaximus78 · June 25th, 2011, 09:30 AM

Thats how this section is these days. What a shame <3

June 22nd, 2011, 11:04 PM	#1
89FoxbodyGT Newbie 1989 Mustang GT N/A Join Date: Jun 2011 Location: Floyds Knobs, Indiana Posts: 4 iTrader: 0 reviews	Getting some hesitation..? I'm new to the board, so whats up everyone? Anyway. My 89 5.0, I've only had it for a couple months now, but here within the last few days I've been getting some hesitation when I accelerate, I figured it was some water in the fuel lines so I put a little bit of rubbing alcohol in my gas tank. It stopped for a couple days, but now it came back. So I'm assuming that it isn't water in the fuel lines because I haven't filled up since then, so could it be the spark plugs? I don't think the Intake timing is off. What else could it be that's causing this?

June 24th, 2011, 04:10 PM	#7
ntilehman Regular 1994 Mustang GT Join Date: May 2011 Location: Joshua Tree, CA Posts: 118 iTrader: 0 reviews	i would go for plugs, wires, cap, coil, and fuel system. look at the fuel filter to see if it needs replacing. they can clog up. if none of it has been done in a while i would say go for it all. a lot of intermittent surging can be the ignition system. __________________ Black 94 GT Drag Springs 4:10 Gears Lakewood shocks/struts Racestar wheels White 96 Cobra V-1 S trim 4:10 Gears 275/40-17 all around Basani Cat Back Exhaust 2001 DHG Bullitt V-2 S trim 3.73 315/17 Rears Magnaflow Catback

June 24th, 2011, 07:23 PM	#8
flattusmaximus78 I Post Entirely Way Too Much 1993 5.ohhhh 12.97 @140mph Join Date: Apr 2006 Location: Gatorland Posts: 6,122 iTrader: 3 reviews	Damn guys be real. Scan for codes first. __________________ 02 Pewter z28, hoosiers/lid/exhaust/spray...125mph 1993 gt Sold, already missed --Moates Quarter horse $225-- --Cobra intake $150-- --tremec 3550 bell and shifter $1100--

June 25th, 2011, 09:07 AM	#9
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Sounds like another case of the blind leading the blind. __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

June 25th, 2011, 09:30 AM	#10
flattusmaximus78 I Post Entirely Way Too Much 1993 5.ohhhh 12.97 @140mph Join Date: Apr 2006 Location: Gatorland Posts: 6,122 iTrader: 3 reviews	Thats how this section is these days. What a shame <3 __________________ 02 Pewter z28, hoosiers/lid/exhaust/spray...125mph 1993 gt Sold, already missed --Moates Quarter horse $225-- --Cobra intake $150-- --tremec 3550 bell and shifter $1100--

June 22nd, 2011, 11:19 PM	#2
00MustangGtPremium Regular 2000 Mustang Gt no clue Join Date: Mar 2011 Location: Naples, Fl Posts: 349 Blog Entries: 3 iTrader: 0 reviews	It could be many things. What exactly do u mean by hesitation and when exactly does it happen? ( like as soon as u hit the gas or while accelerating)

June 22nd, 2011, 11:24 PM	#3
89FoxbodyGT Newbie 1989 Mustang GT N/A Join Date: Jun 2011 Location: Floyds Knobs, Indiana Posts: 4 iTrader: 0 reviews	It happens as I'm accelerating, like I can feel it kind of cut out as I'm going down the road, not like it should. Not full on lose power, but like it kind of jumps a little.

June 23rd, 2011, 02:33 AM	#4
1988 convertible Regular 1988 Join Date: Jun 2007 Location: London Posts: 215 iTrader: 0 reviews	if you let the car warm up it wouldnt be the plugs as that would only happen with old plugs on a cold start... is that gradual acceleration from what your experiencing the issue or full on throttle?

June 24th, 2011, 01:24 PM	#5
00MustangGtPremium Regular 2000 Mustang Gt no clue Join Date: Mar 2011 Location: Naples, Fl Posts: 349 Blog Entries: 3 iTrader: 0 reviews	It sounds like a dying battery, bad fuel pump, or dirty fuel injector ( Im not sure about the last one). Im leaning towards the battery.

June 24th, 2011, 01:53 PM	#6
PsyAbe Regular '92 LX Join Date: Dec 2009 Location: Kuwait Posts: 409 iTrader: 0 reviews	Perform some routine maintenance first. Also, there's a great chance you have to get your EGR valve replaced. A faulty one makes its presence most visible during acceleration and is known to cause jerks and hesitation when flooring the pedal. For good measure check your dizzy and its cap, that can also cause bad acceleration

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