EFI Main relay issues

[wrichards2005]

I'm wondering if my main relay is out because my car won't start. It was having trouble starting when it was hot before (i.e. taking 3 tries to get it to start), but now it won't start at all. Anyway, I hear a click when the check engine light turns off, and I can't tell if its the main relay or not...

[Shehzada]

On my older 89 LX-i , after I knew the MR was good, I changed the TW sensor. It had the same symptoms you describe. After changing it, no problems since then.

[timmy0tool]

if the CEL stays on before cranking then your relay is bad or faulty. it should turn on initially but turn off when the relay clicks over so you can start the car. the click you hear is correct when the light goes out.

if you know it's your relay what i do is hit the underside of my dash. it doesn't always work though haha. they are known to fail on our cars so it could very well be the culprit.

[high c]

On my older 89 LX-i , after I knew the MR was good, I changed the TW sensor. It had the same symptoms you describe. After changing it, no problems since then.

hey just wondering what the TW sensor is?

thanks
justin

[ehulst]

alright yes its your relay, our Main Relays are prone to have issue's, its something about hot weather and our interior heating up to the point where it fries the relay......just replace it and keep replacing it if need be....you can go to Napa or something but like i just told justin(high c) on AIM, get one from Honda.....best way to save the relay, keep your window's slightly down during the summer, and if it acts up give it a good hit to the dash it should kick back into voltage, if not just do something else while the interior cools, i'll update this tommrow and let you guys know the real reason this happens, but i think its something to do with the heat makes the memory board melt or something i dunno, i'll check my pile of relays i have in my toolbox and diagnoise the problem.....

[Shehzada]

hey just wondering what the TW sensor is?

thanks
justin

TW Sensor = Coolant Temperature Sensor

Honda calls it Water Temperature (TW) and in the FSM it is also referred to as that.

[high c]

nice evan, hey where is spindlers? Let me know about the itbs...

[honda83]

were is your main relay? and also what kind of things can happen with a main relay that is on its way out. or maybe have a bad ground or something.

[SN2BH22CB7]

alright yes its your relay, our Main Relays are prone to have issue's, its something about hot weather and our interior heating up to the point where it fries the relay......just replace it and keep replacing it if need be....you can go to Napa or something but like i just told justin(high c) on AIM, get one from Honda.....best way to save the relay, keep your window's slightly down during the summer, and if it acts up give it a good hit to the dash it should kick back into voltage, if not just do something else while the interior cools, i'll update this tommrow and let you guys know the real reason this happens, but i think its something to do with the heat makes the memory board melt or something i dunno, i'll check my pile of relays i have in my toolbox and diagnoise the problem.....

did you say...PILES OF RELAYS... Wow...let me get a couple with some good boards on em!!

nah just kidding!