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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Sound like bad fuel pump?

  • Thread starter Thread starter 281pony
  • Start date Start date Jul 15, 2004

281pony

Active Member
Aug 31, 2003
2,681
2
46
Oly, WA
Jul 15, 2004
#1
  • Jul 15, 2004
  • #1
we just did my new transmission/clutch and i was driving along really grandma like for the breakin and it started about 20 miles in.

ill be going and it feels like someone taps the brakes real quick. just normal driving, then bum.. then its normal. does it about every half mile or so. the other thing i've noticed is, it does it at 1500 rpm's or less. maybe i just can't feel it above those rpm's?

car idles, drives, accelerates, ect everything like normal otherwards. pump is priming fine before starts it seems, but my cousin and uncle have had similar problems and the fuel pump was going/went.

just want a little feedback before i point at anything. my fuel filter and injectors are also brand new and are functioning fine. thanks. seems like you fix one damn thing on these cars and it rewards you with more bs.
 

blackstangt

Member
May 31, 2004
460
1
19
ny
Jul 15, 2004
#2
  • Jul 15, 2004
  • #2
far stretch, but this always seems to be the problem...Timing...mabye.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Jul 15, 2004
#3
  • Jul 15, 2004
  • #3
if you think you are losing FP, get a gauge on it. worse when engine is cold or hot? any codes?
good luck.
 

281pony

Active Member
Aug 31, 2003
2,681
2
46
Oly, WA
Jul 15, 2004
#4
  • Jul 15, 2004
  • #4
i have a fp gauge under the hood, haven't watched it yet.

as far as getting worse hot or cold. it really hasn't changed much. if anything, the warmer it gets the more it happens.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Jul 15, 2004
#5
  • Jul 15, 2004
  • #5
ok, as im sure you know, as a FP on the way out gets hot, it can stumble (the diaphram has lost its integrity and does not work as it should).

but a TFI on the way out can also cause some issues when physically hot (why i suggested a FP gauge to determine which). FP is more likely. it should get a lot worse quick. is it noisier than normal?
 

281pony

Active Member
Aug 31, 2003
2,681
2
46
Oly, WA
Jul 15, 2004
#6
  • Jul 15, 2004
  • #6
nope. isin't any louder then normal.
 
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