89 GT problem

ID89GT

10 Year Member

May 26, 2008

1,659

18

49

Spokane Valley, WA

May 26, 2008

#1

• May 26, 2008

• #1

OK so I just recently got an 89 Mustang GT, and am working on fixing it all up, and have run into a problem. Whenever I accelerate quickly, the car will lose power and will backfire quite a bit and will just not doing anything. If I accelerate gradually it won't do it, but that defeats the purpose of the car and ain't no fun lol. I have been told it is the fuel pump, but don't want to go out and spend 150 bucks or so right now for the one I want and it still has the problem. Any help will be appreciated

 

MarcMonteverde

New Member

Sep 4, 2006

66

0

0

S@c-ToWn

May 26, 2008

#2

• May 26, 2008

• #2

check timming

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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129

May 26, 2008

#3

• May 26, 2008

• #3

First thing to do is pull codes. If it's the pump, you should see a lean code stored. Or have an assistant watch fuel pressure while accelerating.

Good luck.

 

93 LX

Founding Member

Jun 2, 2000

3,081

3

0

Norwalk, CA.

May 26, 2008

#4

• May 26, 2008

• #4

fuel filter??

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,158

17,852

224

Massachusetts

May 26, 2008

#5

• May 26, 2008

• #5

Most likely a tune-up issue.

Run the codes. Give a quick visual to the cap, rotor, and wires and change them if they look burned.

Replace the fuel filter

 

ID89GT

10 Year Member

May 26, 2008

1,659

18

49

Spokane Valley, WA

May 26, 2008

#6

• May 26, 2008

• #6

I replaced the fuel filter, and it ran great for about 2 blocks. Then it went crap on me and now its only gettin worst. Now I can't even accelerate at all without it going crap on me. It is starting to have problems just gettin the car to start even now Also when it does start, you can hear the fuel pump really good whirring in the back when inside the car, and with the exhaust system on it, its pretty loud to overcome that

 

93 LX

Founding Member

Jun 2, 2000

3,081

3

0

Norwalk, CA.

May 26, 2008

#7

• May 26, 2008

• #7

check fuel pressure

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

May 26, 2008

#8

• May 26, 2008

• #8

ID89GT said:

Also when it does start, you can hear the fuel pump really good whirring in the back when inside the car, and with the exhaust system on it, its pretty loud to overcome that

Click to expand...

Noise is as good of a barometer for fuel pump performance as it is for stinkyness of a fart. Don't go by sound alone and assume nothing.

Good luck.

 

87coupe50

Member

Feb 10, 2008

105

1

16

WAYNESBORO, PA

May 26, 2008

#9

• May 26, 2008

• #9

well, I was gonna say change the fuel filter cause I just had a similar issue. Maybe you just have a ton of crap in the tank and need to flush or replace the tank.

 

ID89GT

10 Year Member

May 26, 2008

1,659

18

49

Spokane Valley, WA

May 28, 2008

#10

• May 28, 2008

• #10

Well now it doesn't start at all. It just turns the engine but it never actually starts

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

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May 28, 2008

#11

• May 28, 2008

• #11

Good. That makes it easier. Check for spark. Check injector pulsing. Check fuel pressure. Go from there.