Ned a cap for the filter pump

If you have checked plugs as you have and fuel
is good, you have not put diesel in it.Then it could be
worn points,base plate which points sit on could be
loose or broken.The cap could need a clean on the
parts where rotor arm strikes,cap could be cracked
usually short between the points on cap in the way of
a line going round.Or it could be the coil giving gaps in
out put.Cheapest way,distributor cap ,rotor arm and points,
then base plate under points.You say pump o.k, have you changed filters in fuel line,if blocked could cause your problem.
LUCK

You may have something stopping up the hydraulic supply line. You may have to bleed the air out of the cylinders. they often have bleeders in the end of the cylinders, if not crack the supply hoses loose and bleed air from them. Also loosen the pressure line side of the pump and bleed out air. The pumps should start pushing fluid out, crack the pressure lines while running. Also check that the vent cap is functioning properly. If it is not venting it can build up a vacuum that will starve the pump of oil.

Look for broken plastic casing of the pump. A hairline crack would also leak water. Check for proper fitting of flexible hoses to & from pump. Another thing is to check for loose filter cap. A loose filter cap or broken O ring of the filter cap can leak water.

Check for vacuum lines that have become disconnected or cracked. Check ignition wires. Check for fuel leaks. Check for dirty air filter or a clogged fuel filter. Check spark plugs for fouling and replace if needed. Check distributor cap for cracks. Check cap conductors inside the distributor cap, make sure they are clean. Good luck.

The housing probably has a crack in it. If thats not the problem check the seal where the cap screws in. If thats fine check the cap itself for cracks. Please rate if this is helpfull

Try this. Check the fuel inertia switch. Should be locatedi n the rear in a pane, fuel tank side and not far from the fuel tank. If you have an owners manual, it's instructions are in there.l. Pull to reset. Good luck -Ned-

1 Inspect Choke Thermostat Stuck or Improperly Functioning Choke Thermostat. 2 Inspect Fuel Filter Clogged or Dirty Fuel Filter. 3 Inspect Relay - Fuel Pumpat Faulty Fuel Pump Relay. 4 Inspect Fuel Injector Pressure Regulator Faulty Fuel Injector Pressure Regulator. 5 Inspect Fuel Pump Low Fuel Pressure. 6 Inspect Engine Control Computer Incorrect Operating Information Being Delivered and Sent From The EEC. 7 Inspect Fuel Pump Strainer Clogged or Dirty Fuel Pump Strainerat this is a list of things to check as u have a starting issue this should help u find the problem
1 Inspect Ignition Switch Improperly Connected or Faulty Ignition Switch. 2 Inspect Battery Battery Discharged or Faulty. 3 Inspect Battery Cable Coroded, Broken, Shorted or Poorly Connected Battery Cable. 4 Inspect Solenoid Switch Starter Solenoid Switch Faulty. 5 Inspect Starter Starter Motor Faulty. 6 Inspect Wireset Worn or Damaged Spark Plug Wires. 7 Inspect Coil -Ignition- Faulty Ignition Coil. 8 Inspect Distributor Cap Loose, Cracked or Worn Distributor Cap. 9 Inspect Spark Plug Incorrectly Gapped or Fouled Spark Plug(s). 10 Inspect Distributor Cap and Rotor Kit Loose, Cracked or Worn Distributor Cap. 11 Inspect Fuel Tank Fuel Tank Empty. 12 Inspect Carburetor Worn, Faulty or Damaged Carburetor. 13 Inspect Fuel Pump Faulty Fuel Pump.

How about the MAP SENSOR? Do you check it out?

I have a 1997 jetta and have been through this. Go to the volkswagen dealer and have them pull up the oil cooler housing. You will see a gasket (o-ring) that seals the two pieces of this housing together. Buy that. Your old one has gotten brittle from years of extreme temperature swings and cracked ( it will be like hard plastic when you remove it.) Unscrew your filter, take a 27mm socket (prob need deep well) and unscrew the nut at the top of stud where the filter screws to. Take it all the way off and remove the old o-ring. Clean the area well and put your new oil swabbed o-ring in and reverse the above steps. 30 min 8 dollar fix. Good luck!

This is a very strange case, maybe I mean Maybe you should drop a little pressure from the main water supply.tight the pressure regulator a little bit and try it.

Maybe I am wrong.