Question about 1991 Honda Accord
Engine is hot or car interior is hot? If it's just car interior that is hot (like on a hot day), then you probably have a bad main relay. Very common problem in these cars. To test...next time the car is hot and won't start, turn the key two clicks so the lights come on the dash. Listen in the back of the car for the fuel pump to go on. It should run for about two seconds, or about as long as the check engine light comes on. When the check engine light goes off, you should hear a click under the dash (that's the relay turning off the fuel pump). If you don't hear either of those things, it's the main relay that is bad. You can replace it (and even fix it if you can solder) yourself if you have a socket set. Here's how to do it.
Get a 10mm socket, a long extension (and maybe a short one), and a ratchet. Move the drivers seat as far back as it can go, lay the seat back as far as it can go, and get in the car upside down (with your head where your feet go and your feet where your head goes. Now, look up at all that junk you got under your dash. If you have cruise control on your car, you should see a rectangular metal box just to the right of the steering column (it's your cruise control unit!). It will have the letters MT on it somewhere if you have a manual transmission or AT for auto. I think there are 3 bolts holding that thing on. Take them out and remove that box. Now look up again and you should see the relay at the very top (see pic below).
There is one screw that you will see on the bracket that needs to be removed, and another one that just needs to be loosened on that black thing that is just to the right of it (screw is on the other side). Just loosen the second screw enough so you can get that bracket out from under that thing. Once it's out, you can either replace it for about $50, or you can try and repair it if you can get it appart. The problem with these things is that some of the solder joints go bad, so when you car gets hot inside the metal on the circuit board will expand and will loose the connection. Look for some ugly solder joints like the ones below and re-solder (or just do them all). Put it all back together and you're good to go!
Posted on Oct 07, 2010
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Posted on Jan 02, 2017
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