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Looks like a grounding strap to me.
Is it necessary or should I not be worried about it? Where does the frayed end connect?Looks like a grounding strap to me.
So basically that means that I shouldnt worry about reconnecting it, correct? If it doesn't do anything, why is it there in the first place? :huh:4 wire exhaust sensors use harness ground. Does nada.
"Four Wires - One wire is the sensor signal, one is the isolated sensor signal ground and the remaining two are used to supply a voltage to the internal heater. Also referred to as an ISO - HEGO Sensor (Isolated Heated Exhaust Gas Oxygen Sensor).
The sensor signal wire is directly connected to one of the platinum electrodes on the ceramic element. The sensor output is immune to ground loop voltages and also to large resistances in the vehicle ground return, caused by corroded connections. No NTK four wire sensor is case grounded. Case grounded sensors have the ground wire physically attached to the sensor body. It is not recommended to replace isolated ground sensors with case ground types."
You can find extensive debates on this topic in forums all over the net, even going to the point of suggesting dynos and data logging. I subscribe to the "not needed" theory for 4 wire sensors where the entire exhaust system is grounded via its connection to the block. There is one thread where people with 3 wire sensors replaced with 4 wire sensors to solve exhaust ground problems affecting sensors. Various theories for the exhaust ground strap include:So basically that means that I shouldnt worry about reconnecting it, correct? If it doesn't do anything, why is it there in the first place? :huh:
Hahahaha.....i almost forgot! I had the brakes and rotors replaced last month and it was running great.But now, what about the real problem? His truck is running rough! No, I don't think the ground has anything to do with that, not with a 4 wire circuit, and propensity of those straps to fail - insignificant. How is the truck running today? Miles on Spark Plugs? MAF? Air Filter?
Wife didn't like how our lawnmower was running this week, so turned it off. No IPDM, MAF or ECU issues, so I checked the Air Filter and found it had gotten soaked with Gasoline. Removed to test and it ran perfect! Picked up new filter, off now to mow.
It is definitely a ticking sound that matches rpm: sounds like it could be the engine ground. I will check it out and give it a try. Thanks everyone for all the help.There was a problem with passenger side ticking that varied with RPM on early model trucks caused by a bad engine block ground. The bad ground related ticking on mine had a more defined, distinct "tick" sound versus my cracked manifold "pfit" sound. The cracked manifold noise was also loudest on cold start and diminished as the manifold heated up.
http://www.titantalk.com/forums/tit...rvice/16678-fix-tick-passenger-side-area.html