Hi, we're new to the forum. We recently replaced the head gaskets on a 94 Audi 90 Quattro. The job itself went smoothly, but, we're having a heck of a time finding any wiring diagram for the engine. In particular, we're trying to locate the TPS plug. We somehow misplaced it in the engine so we're trying to find a good wiring diagram to show us what harness and location that the plug would be coming from. Any help on the diagrams is very much appreciated. Oh, engine is a 2.8 V-6. Thanks in advance.
Re: 1994 Audi Quattro 90 engine wiring harness to TPS
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Google it - Check this LINK. If your horn or other steering wheel controls do not work, it's likely the clockspring - the device that transmits the inputs from the steering wheel into the wiring harness under the dash. Pray it's not, otherwise your Audi tech will be buying himself a new S4.
Torque sequence --------- ' 6 2 3 7 ' ' 5 1 4 8 ' --------- Step 1: torque in sequence to 33 Ft/Lbs Step 2: turn an additional 90 degrees Recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) thatpermanently stretch during the initial installation.New head bolts must be used when cylinder head isreplaced or re-installed to obtain proper torque.
It is most likely that it is the transmission, it sounds like you didn't put fluid enough. or something is restriction the fluid flow to the torque converter which is located between the engine and the transmission, it replaces the clutch in a manual transmission. The wiring harness to the transmission may have been unplugged when you did this. make sure it is plugged to the transmission, and the transmission is full of fluid.
Coolant from the car's cooling system will generally escape into the oil passages (and into the cylinders) under pressure when you have a blown head gasket on your engine. You will also notice that you will need to be topping up the coolant level.
This is not a reliable model and the head gaskets on these engines are prone to failure if the cooling system is not completely flushed out and new coolant added at least every 2 years. The head gaskets will also blow if the car has been operated when the engine is overheated - such as when overheating is caused by allowing the coolant level to drop too low.
In your case the symptoms you have described do point to a blown head gasket. If you inspect the coolant in your cooling system when it is cold you will probably also see evidence of oil in the coolant fluid.
You need to get the car to a reputable audi specialist, who is familiar with the problems with these engines, to check it out for you. If you have a blown head gasket, as it appears, the repair costs will be quite expensive as are most mechanical repairs on German cars.
doin a head gasket replacement is not really easy specially if the engine stil in the car . . u have to take the right procedures unless u trying to do a cheap fix, u need to check for warpage for cylinder head and block deck so when it comes to head gasket work u really need to do things carefully and take it step by step.
Remove the large plastic body panel under the engine, if it is still there. The oil pan is about 14in x 12in square with a round sensor in the middle. Drain the oil, disconnect wires, remove all 20 or so bolts. Clean gaskek surface and silicon new gasket in place. replace the bolts, but only hand tight. Let the silicone set for 2 hours, and then tichten to factory spec, about 15in/lbs