D50boy

It's Texas and it's hotter than hell. If the car is sitting in the sun, she will not start. The starter clicks on and the engine turns over just fine, but the motor will not start up. It has spark in the cylinders and I can hear the fuel pump prime.

In the mornings and evening, it'll start on the first crank. At work, I park in a parking garage. After work it'll start. The problem is only when it's really hot.

Any ideas on what the problem could be?

u n v kenny

Well since you said you hear you fuel pump, chances are it's not the main relay.

Could be the eletrical portion of the ignition switch? You could try that first, or the battery.

CASTUDILLO01

HELLO, VIGORS HAVE A ELECTICAL IGNITION PROBLEM BUT I BET THE PROBLEM IS GOING TO BE THE MAIN FUEL RELAY. REPLACE THAT AND IT SHOULD START.

D50boy

Hmm... well where is this this relay?

D50boy

Is the relay under the hood or behind the dash?

D50boy

bumperoo

Duane_in_Japan

Go get one from the dealer, use it as your visual sample of what it looks like, it should bu up around the steering column under the dash. It will be in a cover to protect the circuit board, use two flat tip screwdrivers, one on each side to gently force the cover off, just gently shove a screwdriver into each side of the cover to push the plastic locking tabs back out of the way and gently pull the wire connector and out comes the relay, swap out the new one after changing them on the connector. Pay attention which way it is oriented in the cover, it may only go back in one way but I think it is universal.

It is possible to hear the fuel pump prime, there are actually two relays inside, the other one is for the injectors, so yes you can have spark and fuel pump and have a bad relay.

You can troubleshoot it while the car is not starting, (still hot inside car so be quick) while cranking the key and sitting upside down on the seat, smack the relay box with the handle of your screwdriver shocking the relay to work, change it, it is a wear and tear item and it is what is called in the business as a pattern failure item on Hondas.

You can do a search all over H-T and get great diagnostic info for it, yes the ignition switch could also be bad and it too is a pattern failure wear and tear item also, it is just well known for heat and main relay go together like tequila and a shot glass.

u n v kenny

It may be your main relay. But keep your electrical portion of the ign. switch in mind. Vigor and Legends have the same common problem.

Here is a picture.

Part # at Acura would be: 39400-SL5-A01

D50boy

Beautiful.. Thanks!

Jenni

Would this also apply to a 1992 vigor that has an intermitent A/C and Blower problem? I have the intermitent starting problem, and will replace the relay you are suggesting, but sometimes I cannot get the A/C and or blower to come on. I have it narrowed to what I think is a heat problem and maybe to some relay. Is there one relay that would cause all three problems?
Can I take a relay out of a 1991 Accord to check? If so which ones? By the way the ignition was replaced last year.

Duane_in_Japan

Your AC and blower problem are seperate from your no start issue. Are you saying that it seems that when the inside of the vehicle is hot that the AC and blower motor do not work also, but when the inside of the car cools down, the AC and blower motor works fine???

The AC and the blower motor are tied together, give your indepth details and I will look at a wire diagram for you and lets see if we can narrow down your problem on the AC and blower motor.

The no start is your main relay, look by my name in this thread (forum), that is a main relay with one connector, not sure if yours has two connectors off the top of my head but just buy your new one and use it as a sample to find the old one up under the dash on the drivers side.

Jenni

At this point I only know it is an intermittent problem. Usually in the cool of the morning the blower and the AC will work. If the car is operated for a few miles, shut off and restarted the AC and blower will not come on. It is summer in St. Louis so the inside of the car gets hot from the sun.
Could it be the blower relay by the internal fuse box as indicated in the above diagram?
Recently had to replace turn signal relay which next to the blower relay.

I will replace the main relay in the mean time. Thanks!

Duane_in_Japan

A TIP in the meantime, lets just use some round numbers for arguement sake, it takes 10 amps for a relay coil to magnetically pull the relay switch closed, but once it is closed it only takes 2 amps to hold it closed.

Usually on a relay that works when it is not too hot, you can tap on it and it will pull the switch closed magnetically with this added kick in the butt.

When your car will not start, while cranking the engine with the key in the start position, you can tap on the main relay and the car will start, even while it is still too hot in the car, SO try this on your AC Blower relay that you are referring to and see if it works now, while hot in the car and its not working otherwise, of course. If this works, then just replace the offending relay, good luck.

Jenni

I tried to tap on the relays. That did not work. Here is more detail;
I tried pulling them out and putting them back in the slots, no result.
The blower will not work on high speed.
I can hear a high speed relay click in when I go to high speed.
I am told it could be a transistor in the blower, but it won't be the transistor if the blower works on high speed.
Should that bring me back to the relay?
On the schematic above is it the number 13 or number 23?
Thanks!

blowerproblem

I have been told by a dealer that I need a transistor and a new blower motor for my 1992 Vigor. I didn't get it fixed. It worked for the next 6 weeks without fail until yesterday. I have it on high or low and it worked. Then one day i got in the car and it wouldn't work. Something intermittent is the problem. Help me. I want to check all things.