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Main engine control relay buzzes, No spark,new relay

96 X-90 1.6 16valve

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  • 325 Answers

Faulty relay or where relay plugs in check underside wiring give the relay box a good spray with penatrating oil(relays removed)

Posted on Jan 05, 2013

  • Robbie Crowder Oct 23, 2013

    plugged mine in backwards it buzzed.fixed it and works great

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Posted on Jan 02, 2017

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daves944
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SOURCE: 1997 Honda Prelude 177K. I have done the

Unfortunately you probably need a new distributor. There are three pick-up coils mounted down inside the base of it. They go bad quite commonly. The unfortunate part is; the new distributor will come with a new cap, rotor, coil and module...which you have already bought. The distributors are not that expensive though, maybe you can sell the extra parts???

Posted on Feb 19, 2010

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Engine cranks but no start


Check the fuel pump. Fuel pump relay. Car security system.

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Fuel pump cuts in but car wont start


If you have to force the fuel pump on by the relay who is controling ignition? The fuel pump will come on thru the main relay which is next to the fuel pump relay this controls ignition,go back to the begining,on one of the coil leave a 1/4 between the sparkplugwire and the coil crank the engine there should be spark is there is no spark correct for spark and fuel will return when the ECM see a valid RPM signal.so test for spark first. The Main relay is what needs to be look at

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I have no spark in my 1987 honda accord i have replaced the coil and a new distributor also the main relay fuse is good as well as all the other fuses look good it turns over just fine seems to want to...


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Car cranks but dose not start, there is no power to distributator or fuel pump


I suspect the at this point, the main relay is defective. This relay controls power to fuel and spark circuits.

The PGM-FI Main Relay is actually comprised of two individual internal relays. When the ignition switch is initially turned ON , the Powertrain Control Module (PCM) supplies ground to the PGM-FI Main Relay. This ground triggers one of the PGM-FI internal relays that sends battery voltage to the fuel pump for two seconds to pressurize the fuel system.
When the engine is running the PCM supplies a continuous ground to the PGM-FI Main Relay. The supplied ground keeps the relay in the "closed" position providing electrical current to the fuel pump, keeping the fuel loop pressurized while the engine runs.
If the engine is not running with the ignition on, the PCM cuts the ground to the PGM-FI Main Relay, causing the relay to "open" and stop the electric current flow to the fuel pump. As mentioned previously, if the engine is not running, the PCM will only supply ground to the PGM-FI Main Relay for two seconds when the ignition switch is initially switched to the ON position.
The PGM-FI Main Relay also supplies electrical power to the Idle Air Control (IAC) Valve and to the fuel injectors.

TESTING


If the engine starts and continues to run, the PGM-FI Main Relay is working and does not need to be replaced.
  1. Locate and remove the relay.

On some models of the Civic and Civic del Sol it is located to the left of the steering column under the dash. Many later models position it either near the passenger right side kick panel under the dash or by the driver left side kick panel up under the dash.
  1. Attach the battery positive terminal to the No. 2 terminal.
  2. And the battery negative terminal to the No. 1 terminal.
  3. Check for continuity between terminal No. 5 and 4.
  4. If there is no continuity, replace the relay and retest

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I'm having the same problem. What did it end up being?

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My volvo v70 has three places for fuses and relays, one under the bonnet, one on the end of the dash board on the drivers side, and one the boot on the left hand side you may find what your looking for in one of these places

Jan 04, 2009 | 2002 Volvo V70

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