1993 mazda b2600I engine knocking
My 1993 mazda b2600i runs great! But, if I give more than about 25% throttle, it knocks like crazy and it does not feel like it picks up any faster. any ideas??
A couple of things (besides a plain ol' wore out motor): Plugged exhaust/cat: carbon build up on the piston(s): Jumped timing: bad fuel: mis-routed plug wires
If it idles good, OK, But on acceleration pressure it fails. But it sounds like it needs air, intake to me Just my guess
Sounds more like a plugged cat.
hmmm. that could me, The car has a new exhaust from the cat back
A plugged catalytic Converter will cause a backfire condition - lean - no air out - no air in. You could hook up a vacuum gauge and watch how it acts as you increase RPM to say 2500 and hold it there for several seconds - is the reading low or does it fall off at a steady speed? You could disconnect the exhaust at the manifolds and run the engine - noisy but effective. A muffler shop has the proper tools to make a hole in the pipe and measure the back pressure.
would it matter that i dont have any backfiring?
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