RE: [alfa] Check Engine Light and Temp Gauge Light

["Jeff Greenfield" <alfaguy@xxxxxxxxxxxx>]

It would help if we knew what year and model Alfa this was?

If it is a 164, check the wiring harness right at the Temp sensor for the
EFI. The harness was too short and the wiring has a tendency to fail as the
engine moves on the mounts.

Although most of these have already been repaired at some point in their
life, I've seen many that have suffered from poor repairs to the wiring.

Most likely if the car is still running more or less ok, the sensor is fine.

Might be the same or similar problem with the engine temperature sender
and/or wiring as well.

These problems are less common on a spider, but it can still happen.

Also, be sure to check all the engine grounds, especially those for the ECU
as a bad ground can also cause some of these problems.

HTH,

Jeff


-----Original Message-----
From: owner-alfa@domain.elided [mailto:owner-alfa@domain.elided] On Behalf Of
Terry Johnston
Sent: Saturday, June 05, 2004 9:49 PM
To: Alfa Digest
Subject: [alfa] Check Engine Light and Temp Gauge Light

Hi All,
I am having an electrical problem that is frustrating like all electrical
problems. My check engine light is coming on and the self check is 1-2-1-4
(Temperture sensed by engine collant temp sensor above 140.3 or short
circuit
to battery positive). Concurrent to this problem my red light on the temp
gauge is on constantly even though the temp gauge reads properly and the
light
is on even when cold. I have replaced the temp sensor for the guage and the
light. I have not changed the water sensor for the injection system nor the
thermostat. The idle does seem a bit rough (800-900 rpm) which could point
to
the water sensor temp sensor for the injection system. Any ideas out there?
I'm stumped!
Terry Johnston
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