A few of us were discussing this awhile back. There is (at least on
my '97 and I know the engine was essentially a carryover) a ticking
sound associated with the multi-point fuel injection that is a
"feature" of the system. I've heard it called "Injector Chatter".
I about pulled my hair out the first week I had my truck thinking the
rockers were out of adjustment or sumthin'. Ask Rob Agnew about this
one as well ;) (I think it was you Rob, right?).
Someone mentioned a switch to a returnless fuel delivery system that
might cause a 'ring' as the injector closed but I believe this change
was in '94.
If the in-tank cleaner doesn't work and this is a noise you didn't
have before I would try the 'professional' style injector cleaner that
comes in can that actually fuels your vehicle for about 10-15 minutes.
You disconnect the fuel pump, plug in the cleaner can, and run the
truck till it dies.
Does anyone else have any ideas on this one?
Sean
'97 318/5spd/3.55SG/E-KN FIPK clone
sean_p_meldrum@auto.ittind.com
______________________________ Reply Separator _________________________________
Subject: "ticking" of an injector. . .
Author: dakota@ait.fredonia.edu at INTERNET
Date: 3/31/97 4:29 PM
Lately I've been hearing a light "ticking" sound coming out of the
engine bay and when I was home from college this last weekend my dad
and I got under the hood of the truck to find out what was wrong.
First we thought it could have been a collapsed lifter, but we
checked the rocker arms on both sides and everything was tight. So,
we got out something to put down against the engine to better locate
the sound (used a long screwdriver) and from what we can tell the
"ticking" is coming from or around the area of the #7 injector. It's
kinda loud and can be heard from inside the cab when the radio isn't
on. It doesn't get any louder when you rev the motor (so we kinda
doubt it would be the lifters). It happens in sequence with the
pulse of the #7 injector, though. Is the injector going bad? When
we disconnected the power from the #7 injector it kept on ticking,
though. We even unplugged #5 just in case it was coming from that
one and it still didn't stop it. I've thrown some injector cleaner
in the tank, but after my 200 mile trip back to school a little while
ago it's still ticking. Does anybody have any idea what's going on?
Maybe it's a time bomb or something. . . Hey Jules, do you have any
idea what might be going on with the thing?
- Rob Cobb 93 V8 LE 2wd swb.
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