1992 Mazda Truck whistling noise from engine

1992 MAZDA TRUCK
14,800 MILES • 4 CYL • 2WD • MANUAL
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KEENAN42
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i asked a question earlier this week, about a whistling noise coming from my engine when i'm driving my truck , i don't hear the noise when the truck is just idleing, just when i hit the accelorator. your response was to check the air intake plenum. i haven't done that yet, but i did take the oxygen sensor out and when i hit the throttle i couldn't hear the whistling noise. then when i put it back in and hit the throttle the whistling noise would start back, can't drive without the oxygen sensor in because my truck sounds too loud, i put a new sensor in also, could my problem be coming from a leakage or a gasket. anything you tell me would be greatly appreciated.
Feb 14, 2008 at 8:10 AM
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2CARPRO JACK
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Will it make the noise if you hold the RPM's up while truck is sitting still?
Feb 14, 2008 at 10:44 AM
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KEENAN42
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yes
Feb 15, 2008 at 1:13 PM
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2CARPRO JACK
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Then try using carb spray to find the leak while holding the rpm's up
Feb 15, 2008 at 4:51 PM
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MAZDADAWG
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you could also check the exaust manifold gasket and the gasket between the headers and the muffler. thats where mine was leaking. and it was making a high pitch annoying noise.
Apr 21, 2008 at 1:26 PM