Loss of engine power


RichHanson83

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Apr 16, 2019
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Location
New Jersey
Vehicle Year
1994
Make / Model
Mazda B4000
Transmission
Manual
So I have a 94 B4000 5spd, I was driving one day and all of a sudden started hearing a hissing sound. Stopped and took a look and saw that the DPFE hose had popped off. To make a long story short, the hoses kept popping off so I put a new DPFE sensor and hoses on and they continue to pop off while driving. All while this is going on my engine has very little power, I cant get it over 2000 rpm and my max speed is around 45ish and it takes a while to get there. I can usually drive for about 30 seconds before the power loss starts. Im not quite sure what the next things to look at are. I have also changed the plugs and wires and that didnt seem to help any.
 


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RonD

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Jun 2, 2012
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Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Welcome to TRS :)

Not a guess, 100% sure, your exhaust system is plugged up, maybe collapsed Cat converter or Muffler, tap on both with rubber mallet or 2x4 and listen for rattling inside

If you have any friends that like a good joke, or enemies, lol, check tail pipe for the proverbial banana or potato

Exhaust system should have no pressure inside or NEGATIVE pressure, your DPFE hoses popped off because exhaust was getting backed up and getting Positive pressure inside

Lack of power is because if exhaust can't get OUT then new air/fuel mix can't get IN, so less and less power as pressure in exhaust builds up
 


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