Hi Biba,
Check for inlet air leaks (including via the brake booster), broken engine
mounts (engine movement imparts throttle input). Does the engine have an
'idle-up' solenoid between the carbs (aka anti-dieseling solenoid)?
Check the throttle butterflies are tight, retaining screws in place, and no
signs of wear against the carb.
Can you replicate the symptoms at standstill or only on the move?
Do you have floor mats............. ;-)
Beatle
Alfaless in Oz
----- Original Message -----
From: "AlfaCyberSite" <[email protected]>
To: "AD" <[email protected]>
Sent: Saturday, February 13, 2010 2:13 PM
Subject: [alfa] Unintended Alfa acceleration
Nope, Toyota doesn't have a corner on the market. Okay, the problem is/was
the engine revving high when slowing down. First it only went up to 3K,
then when it started going to 4K+, I turned around and came back to my
shop. I'd stopped along the way to see if the accelerator cable was
pulling out. Using my anemic needle nose pliers it didn't seem so.
Weird part is just as I was turning into the driveway, the idle went down
to normal.
'75 Alfetta GT; Nord; Weber 40 DCOE's; Euro inlet manifold, etc.;
MarelliPlex
Cable was tight, but tightened it a tad more.
Throttle shaft/unit not hung up
Nothing missing on the inlet manifold
No cracks on either the distributor cap or rotor
Springs in place on the mechanical distributor advance
Distributor tight - doesn't rotate
I had very recently been working around the bracket on the firewall for
the throttle cable (heater hose), but that's it. Nothing even touched the
throttle cable.
I just took it for a drive and it seems fine. However, I didn't really fix
anything and wondering if it might come back. A real pain since I had to
turn the engine off at stop lights. I'd hate to get caught in stop and go
traffic and have the unintended revving return.
Any thoughts?
Biba
Irwindale, CA USA
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