91 Accord wont start? main relay?

[slowaccord]

My accord won't start if its hot in the car... basically when I get in it in the afternoon it'll pop over once and then shut off.. ill have to open up my doors and let it cool down for a few mins...main relay under the dash? Also, sometimes when I shut the car off when I stop somewhere and get back in ill try to start it back up it'll pop over once and shut off then ill have to unplug my tps and crank it over for around two minutes then it'll start back up...any ideas? Its getting embarrasing crankin my car over for a while while people are staring..

[cb7pr]

Check:
1. Main Relay
2. Ignitor
3. Ignition Coil
4. S.Plug Wires
5. Plugs
6. Fuel Pump (with a working relay, you should hear a buzzing noise inside the car for a second when your about to start the car; no noise, fuel pump bad.)

...in that order. Mostly likely, your relay if its heat related.

[deevergote]

The first three on that list are often heat related... but that's most certainly the order I would go in as well.

If you have a junkyard with lots of CB7s nearby, you could pick up most of those things free or cheap. They're not guaranteed to work, but it could help diagnose the problem if you pick up a few and mix and match until something works. It's better than buying a $60 part that may not be your solution. However, if you can afford new, by all means, get new. They're all wear items, and I'm sure all are overdue for replacement.

[slowaccord]

Alright thanks guys, I will have to take a junkyard run soon, I almost never hear the fuel pump kick on...don't honda fuel pumps rarely go bad?

[deevergote]

The main relay controls the fuel pump. It's much more likely that your main relay is bad. The fuel pumps do go bad from time to time, but it's not very common yet. I'm sure half of the "bad" pumps that are replaced are really just misdiagnosed main relays! The main relay is a very common thing to go bad, especially in hot weather. The solder points get weak and don't conduct as they should, and the relay doesn't work. This can also be repaired, but you have to be skilled at soldering, and have good magnification (you usually can't see the cracks without)

[slowaccord]

Alright, ill go pick up a new main relay for this thing soon thanks for the help ill let you all know if it fixes my car

[osl]

Alright, ill go pick up a new main relay for this thing soon thanks for the help ill let you all know if it fixes my car

You don't have to but a new one. Just resolder the joints.

[kouzie]

http://www.cb7tuner.com/vbb/showthre...ght=main+relay

[slowaccord]

That resoldering writeup is awesome ill try it tomorrow if it don't rain, sure beats seventy bucks at o riellys in town here ill let you guys know if I kill my relay or not haha thanks for the help!

[deevergote]

That resoldering writeup is awesome ill try it tomorrow if it don't rain, sure beats seventy bucks at o riellys in town here ill let you guys know if I kill my relay or not haha thanks for the help!

You might want to test to make sure it's the main relay that's causing the no-start, before you go attacking it with a soldering iron.

[slowaccord]

I'm just going to pull the relay off in a couple hours and see if the solder points are cracked first

[deevergote]

It's unlikely that you'll be able to see cracks without magnification.

[slowaccord]

Yeah, couldn't see any cracks,but went ahead and resoldered all the solder points, looks great! Looks like its brand new out of the box haha car runs fine..hopefully it holds up to the hot summer days I drilled some holes in the cap so it can breathe I guess..thanks for the help guys!

[magicdragon]

the main relay circuit board contracts and exspands in heat and can break its solder joints

or it could be a bad ground

[slowaccord]

Well the cars been starting just fine thanks for the help