My guess, MAF may need cleaning. Does it make a kind of rattling noise
if you *don't* feather it?
I presume this site is still good:
www.tccoa.com and search tech tips on how to remove and clean the MAF.
USe an electronics cleaner or even rubbing alcohol... NOT Windex or
anything else that leaves a film or residue.
Do NOT use qTips... use a soft bristle paint brush or even tooth brush.
That's a good idea.
But here's an idea. warm the engine, turn off and disconnect the MAF
harness, drive it.
If it runs better, clean MAF.. like FH says.
If it runs worse, check or replace the Throttle Position sensor
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
FWIW, we expect to see more poor idle complaints resulting from MAF
contamination than acceleration concerns. IIRC, the 94 4.6 "should" be OBD2.
As such, a WOT acceleration should drive the PCM into an "open loop - drive"
configuration and the injectors should go pig rich per base programming.
My vote would be check fuel filter (better yet, fuel pressure when the
concern is evident) for this concern....
Just remember... this is coming from a guy that hasn't worked on anything
gas powered for a couple of months, now...
What he described is exactly what happened to me and I got the cure
right here. To get to freeway speed without hearing a bunch of racket
(pinging, but not like any pinging I had ever heard) I had to feather
the gas and gradually get up to speed. Know zip about the tech stuff
but I was sure amazed (and grateful) for the cheap and easy fix.
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