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1994 Chevy Suburban Engine lacking power

Tiny
KWEEDII
  • MEMBER
  • 1994 CHEVROLET SUBURBAN
Engine Performance problem
1994 Chevy Suburban V8 Four Wheel Drive Automatic

This truck was recently showing signs of a clogged catalyc converter. Engine perfomance would decrease after long periods of driving. We have had a new exhaust system, including a new catalyc converter installed. Only a few days after installing the new exhaust the symptoms have reappeared. After driving for a long period the engine starts loosing power dramatically. Also the donut gaskets have started leaking on the exhaust manifolds. Could this be do to a fuel pump getting weak?
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Tuesday, February 9th, 2010 AT 3:02 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
First, if the donuts are leaking, return to where you had the exhaust replaced and have them fix it.

As far as the power loss, has the check engine light ever come on? Also, the fuel pump could be weak and should be checked. Here is a how to for checking fuel pressure:

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

Let me know what you find.
Joe
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Tuesday, February 16th, 2010 AT 2:10 PM

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