Ask Experts Questions for FREE Help !
Ask
    wcmindfreak's Avatar
    wcmindfreak Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 15, 2012, 02:59 PM
    What is the difference between carb and efi main relay in honda accord
    Someone please help!

    I have an 86 Honda Accord that is carburated. It will turn over, but not crank. I noticed the fuel pump wasn't coming on. I replaced the main relay with a used one that came out of an 88 Accord that has EFI. When I turn the switch to II, the fuel pump comes on and stays on. The original one would go off after two seconds. I am wondering if there is a difference in the relays. I still can't get it to start, except when I retard the distributor. If I turn it down, it will start with the gas pedal to the floor. It putters, but it will run.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #2

    May 15, 2012, 03:17 PM
    Will not turn over and will not crank is the same thing.
    Sounds Like it Is Not Firing or Starting.
    Those relays should be the same.
    Test it externally.
    If you notice 3 terminals in a row, that is the relay contacts(SPST), the common is perpendicular to the other 2(NO and NC).
    The 2 on each, side you could apply 12 volts to and see if continuity changes and any delay.
    You need a 12 volt power available and a continuity tester of some sort.
    Any Codes?
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #3

    May 15, 2012, 03:27 PM
    Here is the relay, you can get a pulse with a resistor and cap as shown:

    Relay Diagrams - Constant to Momentary Output - Positive Input/Positive Output
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Where is the main relay on my 90 honda accord? [ 2 Answers ]

Starts fine when the engine is cool, But won't start when its warm

93 honda accord- what's the difference between a fuel pump relay and a main relay? [ 1 Answers ]

Starts, however it fails every few months. It intermittently just cranks and doesn't turn over. I believe it to be a fuel pump relay or a main relay. Which one could it be?

Where is main relay on 93 honda accord [ 2 Answers ]

My 93 honda accord 4 cyl. Will not start. Cranks fine. Changed fuel filter. It will start then cut off and won't start again. Was told most likely problem was fuel relay switch. Where is it located and how do I change it?

Main relay on a 96 honda accord [ 1 Answers ]

Where is the main relay located on a 1996 honda accord?

1990 Honda Accord main relay [ 1 Answers ]

I have a 1990 Honda Accord, I am trying to locate the main relay under the driver side dash and am unable to do so. I bought a new relay and nothing under the dash resembles this new relay. Any assistance would be appreciated.

View more questions Search