Built ford tough

"Matt Ion" <soundy@moltenimage.com> wrote in message
news:86Wdf.495786$oW2.406312@pd7tw1no...
>I know it's not a Mazda group, but it's a pretty bright lot in here, and I
>doubt this issue is really Mazda-specific.
>
> We just completed an engine swap (1.8l four, auto, EFI) in my buddy's '93
> Protege, and while the new engine (well, used, from a wrecker) fired right
> up and seems to run smoothly, there are some bad noises. One is a steady
> clicking that appears to be one of the injectors. That one doesn't worry
> us so much, but what does is the rattling/clanking sound that SEEMS to be
> coming from the intake manifold and/or throttle body. It almost sounds
> like something lose banging around, as it's steady in time with the engine
> at idle, and starts after the engine starts to warm, gets worse as it
> warms up, and seems to go away when we rev.
>
> Everything bolted to the back of the engine seems tight and solid; there
> doesn't appear to be any "outside" source of the noise. We're wondering
> if it might be an intake valve and the noise is just travelling up the
> manifold such that it seems to come from there.
>
> Any other ideas of what to look at? Any help is appreciated...
>
>
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