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I. Home

Misc Home links:

Troubleshooting humidity problems
Troubleshooting ECU light is constantly on
Troubleshooting main relay circuit
Troubleshooting Starting system problems (extrnl. link)
Civic mainrelay location
Civic Igniter location 85-91 Relay (Flash) 92-95 Relay (Flash)
Flash demo (main relay) Flash depicts the hardest location.
Fuel pump replacement and inspection.

II. Main Relay

Overview
Solution
FAQs
     What is the main relay?
     How does the main relay fail?
     How do I know if the main relay is dead?
     How does a good main relay sound like?
     What does it look like?
     How much does it cost?
     I can't find my main relay, where is it at?
     How does it work?
     How do I get the main relay out?
     I don't know how to solder and I need it fixed so I can drive around town.
     My car stalls, but starts only after five minutes when the fuel pump whirls, is this the main relay?
     My car is not fuel injected and I don't hear the fuel pump, why won't it start?
     How do I check for fuel pressure without a pressure gauge?
     How do I check if my fuel injectors are working?
     How do I check if my fuel pressure regulator (FPR) is working?
     My check engine light or transmission shift light is on what do I do?
     My fuel pump is dead, there is no sound when I turn the key?
Find it (locations)
     Accord
    Civic
     Acura
     Others
Technical Details
Troubleshoot
Soldering Relay
     Main Relay close-up
     Main relay road test
     Fuel pump replacement/testing

     What causes the main relay to fail?
     Should I remove the old solder?
     My Honda does not like to start sometimes when it is hot out if I don't let the fuel pump prime and then try to start it?
     My check engine light is on and it won't start. Is this caused by the main relay?
     My 90-94 Accord doesn't shifts properly and the "S" (D4) light is blinking, can this caused by the main relay?
     What can make the main relay hot.

III. Ignition System

Honda Ignition troubleshooting
Section 0: Basic troubleshooting
Section 1: How to check for spark
Section 2: Visual Troubleshooting
Section 3: Input Troubleshooting
Section 4: Coil and Igniter Troubleshooting
Section 5: Distributor replacement
ECU power source
Acura Troubleshoot
How Igniters work
How DIS works