i was curious what kinds of problems will show if the main relay starts to go bad.

 

Car won't start after parked for just a minute.
Car won't start when hot outside. Fuel injected PGMFI models only
Car starts but quickly dies as the rpm shoots to 1300 rpm.
Once started the car won't stall.
the symptoms return after shutting off the hot engine
No humming sound from the fuel pump the moment the ignition switches ON.
No click sound after the ignition key turns
10-15 of waiting and the car pushed to a shade will usually start.

http://techauto.awardspace.com/mainrelay.html

^ Great info on repairing the main relay and or everything you need to test yours out or even by-pass it.

 

i think the first 3 sound just like whats going on with mine.

the 4th one you listed doesnt make sense to me ?

thanks that really helps me out.

i think ill just buy a new one.

 

take yours out & resolder it, much cheaper

 

Once started the car won't stall.

Meaning that the solder contacts have melted onto another part of the board which keeps constant power going to the board instead of the power leaving when you turn the ignition off.

Re-soldering your old one > 45 bucks for a new one. The site I listed shows you everything to do to resolder it and what the connections should look like when you open it.

 

ok, i guess i have plenty of time right now. i can give it try.

 

just finished it. ill be testing if it changes behavior.

i removed all the old solder on each of the contact points.
then i gave it a ton of soilder on the top of each point.

 

Ive had simular problems like this and i am planning on resoldering my main relay as well. I was just curious what your turnout was?

 

i dont think i noticed much of a difference. im still having problem starting up.

 

Good post.

What are your symptoms. Is it just cranking for a long time before starting?

 

Mine is acting the same way..after I replaced the main relay it started fine once and ran. Then it shut off and would only crank but not turn over?? And it doesnt struggle before it dies.

 

I could remove my main relay and tap on it a couple time and my car would start right up and that's how i knew it was the main relay i could actually feel it click in my hand

 

i kno this is a 09 post but with a bad relay would the pump stop working .. or after the car dies no humming after the first turn of the key?

 

not sure. maybe take a video and show us what you got going on.

 

my car has problems too. i switch to ignition and it just cranks and cranks and cranks. then it slowly starts to stutter like barely getting fuel then slowly a little more then it cuts on... and when I'd break harsh on. stop sign . it just shuts off...
now it won't turn on at all will just crank and crank...
if any help please do!!


Posted from Honda-tech.com App for Android

 

I have the same issue with mine..

 

Are you guys getting spark? Check possibly

 

I had spark on every plug

 

as do I. but I believe my problem might be my timing belt/chain. its lose on one side. tight on the other.


Posted from Honda-tech.com App for Android

 

bump as this is some good info to kno

 

When my main relay went bad. .My car slugged at the start. then started to slug more and more.. till i got tired of the fact that it might not start took out the main relay smelled it (smelled burnt) Bought a new one. fixed the problem.

 

I tried 3 relays. including my own.

1 different ecu mpfi obd0 integra pr4 ecu.

changed my injectors to d15b7 then to another set from eBay I bought meant for d16a6.

changed fuel filter. new.

I hear fuel pump hum kicking in.

I tried hand over manifold with Carb cleaner inside.
started but then died was idling during process.

and I noticed my timing belt is sorta loss by my thought it should be really tight. so I'm trying that next.
so far nothing has worked.

any ideas would be great!


Posted from Honda-tech.com App for Android

 

Your car isnt starting?

 

nope I changed or check all those things still doesn't start


Posted from Honda-tech.com App for Android

 

Whats the start sound like.. or lack of start?
I mean does it slug, just clicks? i mean the sound helps quit a bit.