My 92 eg doesnt like to start when its warm. It has spark, and fuel, and wont start. IT does this sometimes whenever its warm and sitting out in teh sun.

I believe that this is semi-common occurance and there is a relay that tends to go bad. Which relay is it?

 

had this happen to a couple of my hondas. its usually the main relay,

 

When my car did this last summer i removed the main relay, desoldered and resoldered the main relay. Car has started every time since then.

 

ok thank you, so you just de-soldered and re-sldered? Didnt purchase another?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Used2beAb16 &raquo;</TD></TR><TR><TD CLASS="quote">ok thank you, so you just de-soldered and re-sldered? Didnt purchase another?</TD></TR></TABLE>

yes, desoldered and resoldered. I figured it was worth a shot before buying a new one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Used2beAb16 &raquo;</TD></TR><TR><TD CLASS="quote">It has spark, and fuel, and wont start.</TD></TR></TABLE>The main relay switches power to the fuel pump, ECU, & injectors. When it fails you don't get fuel. Double check whether you really have fuel & spark.

 

yeah it def has fuel and spark. It did this when it was hot last summer, but then it cooled off outside and i kinda forgot about it, and then yesterday was the first time it was hot and in the sun, and sure enough it did it again.

I was told before it was a relay, and that it didnt make good contact whenever it got hot. There is def fuel coming out of the rail, and def spark.

What else could it be????

 

******* HONDAS!!! i feel like i have the worst luck. stupid **** like this always happens to me. IM GOING LS1!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Used2beAb16 &raquo;</TD></TR><TR><TD CLASS="quote">I was told before it was a relay, and that it didnt make good contact whenever it got hot...</TD></TR></TABLE>All the internet mechanics say 'IT'S the MAIN RELAY', because that IS a common problem. Thing is, when the main relay craps out, you don't get fuel. Since I'm not really sure about your problem, you better go back to basics & check what you've got or what you're missing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">All the internet mechanics say 'IT'S the MAIN RELAY', because that IS a common problem. Thing is, when the main relay craps out, you don't get fuel. Since I'm not really sure about your problem, you better go back to basics & check what you've got or what you're missing.
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Yeah I kinda assumed it was the main relay becuase thats what everyone online said. I really am at a loss here. I mean, i have spark, I have fuel, the starter is turning over the motor. As a matter of fact it will turn the motor over until the battery is dead, but it will never start.

For example, it just did this to me yesterday, so i took my coupe, then tonight when i came home, it was cool outside and it fired right up.

I really dont see how its not starting when it has everything it should need, spark, fuel and its turning. Unless its not sparking at the right time? Im at a loss really.

 

same thing was happening to me, I replaced my main relay and was all gravvvyy...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda Sport &raquo;</TD></TR><TR><TD CLASS="quote">same thing was happening to me, I replaced my main relay and was all gravvvyy...</TD></TR></TABLE>

same here

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda Sport &raquo;</TD></TR><TR><TD CLASS="quote">same thing was happening to me, I replaced my main relay and was all gravvvyy...</TD></TR></TABLE>But were you getting fuel?

Used2beAb16... How do you know you're getting fuel? Maybe you've got fuel pressure in the rail but the injectors aren't firing? Pull a sparkplug after trying, to see if it's wet. Do you smell gasoline at the tailpipe? How about flooded? Ruptured FPR sending fuel thru it's vacuum line?

Most times when someone has fuel & spark & it won't start; it turns out that either fuel or spark isn't really there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">But were you getting fuel?

Used2beAb16... How do you know you're getting fuel? Maybe you've got fuel pressure in the rail but the injectors aren't firing? Pull a sparkplug after trying, to see if it's wet. Do you smell gasoline at the tailpipe? How about flooded? Ruptured FPR sending fuel thru it's vacuum line?

Most times when someone has fuel & spark & it won't start; it turns out that either fuel or spark isn't really there.
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Ok, i was thinking somewhat along the lines that you were thinking. When i checked for fuel, i just checked to see that the rail was getting fuel pressure, and it was def pumping fuel thru the rail. I did not however see if the injectors were firing.

If there were a ruptured fpr, why would this only affect me on the hottest days. I am atleast getting fuel to the rail, and I know there is spark because i can crank it and it will arc sparks to the car, or whatever. ( Whether its sparking at the right time is a whole 'nother issue i didnt check)

Next time it happens i will try to check the injectors to see if they fire, the thing that makes it tough is it doesnt do it all the time, and i gotta wait for it to happen, and today it was hot, but it started and drove just fine. It seems that it only does this when im in a hurry and i dont have time to check, i just take another car.

I really dont know of anything i can check while its not acting up. Its really gettin frustrating. Where is the main relay located maybe ill just look at it and see if it looks at all screwed up. Is it in the underhood fuse box with the other relays?

Also to you other guys, when the relay was bad were u still getting spark and fuel?? Thats what i dont get, and also 1 hot day it will not run, and the next hot day it will run fine, and it always runs fine when its 60 deg or less.

 

JimBlake,

Also, I am trying to think back if the plugs were wet when i checked for spark. I checked for fuel and spark both consecutively and I dont believe the plugs were wet actually, but i cant be sure. If so then i guess the injectors werent firing. The only problem is i have to wait for it to act up again before i can test it.

 

A ruptured FPR might be affected by temperature, but I agree it would probably screw up all the time.

Have you had the plug wires off? Are you sure you have the right firing order? But no, that would HAVE to be screwed up all the time. It can't change with the weather.

I don't know '92 EG specifically, but Honda traditionally puts the main relay up high on the left kick panel. Sorta like 10" above the hood-release lever. It's a long-ish relay housing, since it's really 2 relays sharing their case. You can look for loose connections to that, or just take it out & check it.

Since it only happens when you are in a hurry, then you don't REALLY know about fuel. The main relay fails to turn on the fuel pump, then you take another car. Then later when you have time to check, it's working OK so you get fuel.

Try this... Every time you start, pause the key at the 'ON' position before you start, & listen for the fuel pump. If your stereo & blower are turned off you should be able to hear it if you pay attention. I bet once in awhile it doesn't run, then you can blame the main relay.

 

Here's something else. Try tapping the relay when the car doesn't start. If the relay is bad, this usually gets it to start.

 

JimBlake,
though it usually happens when i am in a hurry, there has been 1 time when i couldnt get it to start, and i checked for fuel and spark, and there was both. (like i said there was fuel pressure at the rail so that would mean the pump was on.) I have not however checked to see if the injectors were firing.

As far as the letting the fuel pump turn on before starting the car, that is a habit of mine that I always do. I do it so much that I dont even always listen for the pump, i just give it a few seconds to build some pressure.

So, I will look up there for the relay and see how it looks. Today was the hottest day yet and i couldnt get it to act up. It doesnt do it everyday when its hot, just occasionally, but all autumn, winter and spring it doesnt do it.

 

Tapping the relay sounds like a good idea, keep that in mind for next time it screws up.

I don't know much about differences from '92 EG, but the main relay probably supplies power to the injectors. Maybe (unlike most) your main relay is flaky with that circuit, rather than the normal flakyness with the fuelpump contacts? On my cars the same color (yellow/black) wires on all 4 injectors should be +12v with the ignition turned on. The ECU closes the ground side of the circuit for each injector.

 

From my understanding, with the ignition on, and the car NOT running, there will be constant power to the injectors correct? The Ecu will be grounding them then? OR not? The ground is what opens the injectors right? Not that its relevant but i think thats how it works and im curious.

 

What I meant was...

One wire for each injector is always hot (battery voltage) when the key is on. These wires are normally the same color (yellow/black?) on all 4 injectors. The other wire of each injector is a different color for each injector, & those wires go to the ECU.

The ECU momentarily closes that wire to ground when it wants to fire the injector. So with the ignition on but the engine not running, you have battery voltage on one wire & open-circuit on the other wire. So if you measure from the yellow/black wire to ground you get battery voltage, but if you measure from one wire to the other at the injector plug you get nothing.

The ECU won't ground that wire until it wants to fire the injector, based on the CKP, CYP, & TDC sensors in the distributor. That doesn't happen until you crank the starter.

If '92 has a resistor box for the injector circuit, I'm not really sure how that changes it, but I think what I said above will still be true.

 

It has crossed my mind of the tdc sensor or something is going bad? Whats the is ckp Crank position sensor? How about CYP? I have a feeling that there is something screwed up with one of these sensors, (affected by heat) that may be causing it to spark at the wrong time.

 

try another distributor to see if it goes away, those seensors are in the dizzy for that car

 

Yeah i have been considering trying to swap in another distributor, i just hate to buy one and that not solve the problem. (Or i count on that solving my problem, then it leaves me stranded somewhere.)

Do all the 92-95 distributors work? I am guessing that they do, but im not totally sure.

 

My '95 Integra had 3 timing-sensors in the distributor, crank-position (CKP), cylinder-position (CYP), & top-dead-center (TDC). Sometime later Honda moved towards simpler sensors & more sophisticated software to do the same job. Theoretically there only needs to be one sensor with enough information encoded in the signal so the ECU knows where the distributor is pointing.

I don't know much about changes in those timing sensors in the distributor, from year to year. Knowing which distributors swap into different engines has been asked a zillion times & I don't remember any details.