1991 Dodge Monaco loss of power

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  #1  
Old 04-17-04, 10:33 AM
Huxley
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1991 Dodge Monaco loss of power

I will drive the car for about 6-7 miles and at that point the power will go down 30 to 40 percent. It repeats this pattern every day. I have check all the fuilds and they are full. At first when it did it was only a small lose of power but now it has worked it's way up to about 30%. Engine size 3.0 mileage 151,000 auto. transmission. Has had the problem for about a month.

Thanks in advance
 

Last edited by Huxley; 04-17-04 at 10:47 AM.
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  #2  
Old 04-17-04, 02:04 PM
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Location: So Cal
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Sounds like a fuel or ignition problem.

You need to check fuel pressure at idle and under ACTUAL driving conditions so you can see what happens during the power loss.

You also need to check or replace the fuel filter and check the ignition system.

If you can get us this info, we should be able to point you in the right direction.

HTH
Matt
 
  #3  
Old 04-17-04, 03:08 PM
Huxley
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Can they test fuel presure while driving the car?
 
  #4  
Old 04-17-04, 04:33 PM
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Originally posted by Huxley
Can they test fuel presure while driving the car?
Sure, you'll have to tee in a fuel pressure gauge and run it up under the cowling and maybe tape it to the windshield so it can be seen while driving. If by chance that doesn't turn out to be the problem, you may try dropping the exhaust to check for a plugged cat. That would give symptoms like that also, especially with the high mileage like that.
 
  #5  
Old 04-17-04, 04:52 PM
Huxley
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I should also note that it losses power no matter what speed you are going.
 
  #6  
Old 04-18-04, 12:31 AM
mike from nj
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and i'll be the 3rd person to recommend a fuel pressure test, WHILE the problem is happening.


for curiosity sake, how old is the fuel filter?
 
  #7  
Old 04-18-04, 08:11 PM
Huxley
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Fuel Filter is on about 50,000 miles
How often should it be changed?
 

Last edited by Huxley; 04-18-04 at 08:30 PM.
  #8  
Old 04-18-04, 08:41 PM
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About every 12-15K. I'd say it's about time.
 
  #9  
Old 05-06-04, 07:05 PM
Huxley
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When a fuel pump goes out will it quit all of a sudden or will it go a little at a time?
 
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