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 Fuel pump or Alternator?
#679559
12/23/05 10:33 PM
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Joined: Dec 2005
Posts: 14
OP
Need a Spot
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I have a 1997 Isuzu rodeo 3.2L, Last night on the way home from work, I noticed that every time I steped on the gas the voltage gage would drop below 12 volts.The fan would slow down and lights would dim. After 4 or 5 seconds it would recover again.This morning I went to start it up, it ran 3 or 4 seconds,the voltage gage droped hard and it stopped running. now it only turns over and won't start. I will check for blown fuses. What should be looked at first?
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Re: Fuel pump or Alternator?
[Re: zudoo]
#679560
12/24/05 01:22 AM
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Joined: Sep 2005
Posts: 416
Mudrunner
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I'll bet on the alternator.
--Dave
1999 Rodeo LS 3.2 4x4 5 Speed
32x11.50-15 BFG T/A KO on US Wheel 94 series
3" Lift - Rancho 9000x
Rear No-Slip Locker
Flowmaster 50 series SUV 2.25"
There is a very fine line between "hobby" and "mental illness." - Dave Barry
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Re: Fuel pump or Alternator?
[Re: Gizzy42]
#679561
12/24/05 03:01 AM
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Joined: Aug 2000
Posts: 4,868
Roll Me Over
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every time I steped on the gas the voltage gage would drop below 12 volts.The fan would slow down and lights would dim. After 4 or 5 seconds it would recover again.This morning I went to start it up, it ran 3 or 4 seconds,the voltage gage droped hard and it stopped running. You could not have written a better description of a failing alternator if you had tried. You need to have it load tested at your local auto parts store.
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 Re: Fuel pump or Alternator?
[Re: Jim_Paget]
#679562
12/24/05 06:08 AM
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Joined: Dec 2005
Posts: 14
OP
Need a Spot
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Jim,
Thank you for the confident reply. Sorry for the double post.
I will get to work on the alternator. Also, quite relived that the fuel pump is not suspect at this point!
1997 Isuzu rodeo 4WD 3.2l auto, 31x10.5 R15's
"Fool proof systems do not take into account
the ingenuity of fools." -Ken Clayton
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Re: Fuel pump or Alternator?
[Re: zudoo]
#679563
12/26/05 08:36 PM
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Anonymous
Unregistered
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It costs more for a replacment alternator than it does for an in-tank feul pump for our trucks.
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Re: Fuel pump or Alternator?
[Re: Jim_Paget]
#679564
12/26/05 08:45 PM
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Joined: Dec 2005
Posts: 14
OP
Need a Spot
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every time I steped on the gas the voltage gage would drop below 12 volts.The fan would slow down and lights would dim. After 4 or 5 seconds it would recover again.This morning I went to start it up, it ran 3 or 4 seconds,the voltage gage droped hard and it stopped running. You could not have written a better description of a failing alternator if you had tried. You need to have it load tested at your local auto parts store. That was before I could tell you that I found the fuel pump fuse to be blown. Thats why it wouldnt start. Now it keeps blowing the fuel pump fuse. Is it the alternator thats causing this? I feel its the fuel pump. Thanks to you guys( I really do appreciate the responses <img src="/forums/images/graemlins/cheers.gif" alt="" />) my wife thinks Im nuts. How can a bad alt blow the fuel pump fuse...over and over? Doesnt a bad fuel pump do that?
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