I believe that the 96 has an electronically controlled ignition and cannot be adjusted. If there is a timing issue then timing belt replacement or adjustment is necessary.
YOU can if you have an engine scanner. if you have not fooled with the distributor then there is no need to adjust the timing because it is controlled by the ECM / computer. It will adjust it's self.
Distributor timing is adjusted by rotating the distributor. A scan tool is required to put the engine computer in distributor sync mode. The distributor is then set to zero degrees.
I really depends on what distributor you have on the engine. It could be a mechanical advance distributor or a vacuum advance distributor (stock). Google "the Somba" Volkswagen forum and all will be explained.
If it's the 3.0 OHV engine it's located on the driver side of the engine between the throttlebody and spark distributor back under a wire bundle. It's located where the mechanical distributor used to be.
This depends on whether the engine is equipped with a distributor or with EDIS (Electronic Distributorless Ignition System). If EDIS, there is essentially no adjustment. If distributor, you remove the engine cover inside the vehicle and loosen/turn the distributor like any other. Get an aftermarket manual such as Chilton or Haynes for detail of procedure.
It is a mechanical fuel pump located on the engine. It is in the drivers side front below the distributor.
- Do not adjust timing on anything from the distributor cap. You can adjust timing by moving the distributor. - You need a timing light and timing needs to be at top dead center to start. Then make a visible mark on base of distributor and engine block so you know where distributor was when you started. That's in case you need to start over. - Loosen the bolt that holds the distributor. Only loosen it enough to move the distributor. - Now hook up the timing light, being careful not to get hit by fan, or caught in the fan belt. Aim the timing light at timing marks on the front of motor. You may need a second person to move the distributor for you. This gets moved very slowly, a tiny amount at a time. - Using white out, color the correct timing line on front of engine so it will light up when using timing light. - Start the engine while watching the light on the timing marks. You can tell the other person how much and which way to move the distributor. Move only until the marks are lined up . - When it is correct it will look like the light is on all the time. When the distributor is in the correct position tighten the bolt that holds the distributor. - After doing this, if the engine is backfiring, and you have previously had the distributor removed from the engine, it is most likely because the distributor is installed 180 degrees wrong. - To correct the backfiring remove the distributor bolt, rotate the engine top dead center on the number one piston. If the rotor at this time is not pointing at the number one plug lead then carefully lift the distributor from the engine enough to rotate the rotor 180 degrees. Then re-insert the distributor and try timing from start again.
If the starter is still rotating the crankshaft upon turning the key in the ignition, AND there is a charge from the ignition coil to the distributor, the problem is most likely that 1. The distributor is improperly timed and/or calibrated for the engine in which it is placed, 2. The distributor is the incorrect type for the engine it is attached to, or 3. the mechanical linkages that spin the rotor are defective or incorrectly installed.
>you don't adjust the vaccuum advance. you adjust the distributor. then when engine is running the vaccuum advance will work automatically to the needs of the engine< As a matter of fact, the Ford vacuum advance is easily adjustable. Put a 1/8" Allen wrench through the open of the vacuum advance canister where the vacuum hose goes. Screw it in to slow the rate of advance and screw it out to speed it up. I think it works on a spring preload system.
That should work, but be remember you may be 180o off, so you mave have to adjust.
The 1991 BMW 520 distributor Can be found on the back side of the engine. The distributor Will be on the top of the engine.
The distributor is on the front of the engine.