1994 TOYOTA COROLLA, gas mileage

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Old 10-23-08, 03:22 PM
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1994 TOYOTA COROLLA, gas mileage

Greetings;
Car is a 1994 Toyota, Toyota Corolla, a/c 1.6l engine, automatic.
Recently I have noticed that the car seems to be straining to maintain highway speed and the mpg appears to be dropping. On startup the car sounds loud, almost like there is a exhaust system crack somewhere, but I can't seem to isolate it. This also gives a high noise volume when at highway speeds, but not the roar you would associate with broken system. My problem is that I have nothing to compare the car to! I don't know anyone with this type of car. They all have SUV's. ( for now anyway!)
Question is will a obstucted \ broken exhaust system affect the performance of this type of car? I know on some other cars I had owned that a certain blowback pressure was desireable for proper engine performance.
 
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Old 10-23-08, 03:30 PM
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Yes it can, aspecially if it broke before the O2 sensors.
 
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Old 10-23-08, 03:52 PM
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HotinOKC

Thanks for the reply. That is what i tought but I wasn't sure. The nearest isolation I can make is that it is either at the gasket of the sensor or before it. Actually the system is original and flakes alot of rust when I searched for the leak (engine running, but only just after starting. Don't need to burn my hands! Been there done that! Accidently of course).
 
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Old 10-23-08, 03:55 PM
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Look around the manifold (the piece that attaches to the side of the engine). There can usually be a crack there. Of course, make sure it's cool
 
 

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