Fuel pump

2003 VOLKSWAGEN PASSAT
200,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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PRINALD SMITH
  • MEMBER
  • 1 POST
The car will not start. It turns but no start. Battery is new, plugs are new, pump runs when i put it direct to twelve volts. Did a few checks and found that the fuel pump is only getting 3.4 volts.
Mar 17, 2018 at 8:41 AM
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PATENTED_REPAIR_PRO
  • ✓Experienced Mechanic
  • 1,853 POSTS
See how many volts are reaching the fuse #28 in the fuse panel when the key is first turned to run. Then if need be, check how many volts is present at the fuel pump relay socket pin 17 with the relay removed.
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Mar 17, 2018 at 10:28 PM
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F4I_GUY
  • ✓Experienced Mechanic
  • 3,302 POSTS
Scan for faults and post results, if you have around 8+ random engine faults it’s a sign that the FP relay and load reduction relay have failed. Post the faults first and I will be able to tell you if they are being caused by the relay.

If not, the wiring under the carpet on the a-pillar on those cars due start to corrode/short and cause strange electrical problems.
Mar 27, 2018 at 11:52 AM
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