1993 Honda Accord starts but shuts off

MATTHEWLT

MEMBER
1993 HONDA ACCORD
4 CYL
2WD
AUTOMATIC
163,000 MILES

Hi, when I start my car it shuts off shortly after. I will wait a little while and then start it and it will shut off again. I tested the battery and the alternator and they are good. I changed the coil because there was not a spark in the number one spark plug. Now there is a spark in all spark plugs but it still shuts off after about 3-5 min. I also changed the fuel filter. Still it will not stay on.

3 Replies

KHLOW2008

MECHANIC
41,814 POSTS

Hi MatthewLT,

Thank you for the donation.

I need some additional info to understand the problem and hope you can fill me in.

1. Does the dashlights stays on when the engine stalled?
2. Was it easy to restart?
3. What is the idling speed?
4. Is the Check Engine Light showing when the engine is running?
5. Do you hear the fuel pump woking when ignition switch is turned on after engine stalled?

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Monday, December 16th, 2019 AT 10:33 AM

MATTHEWLT

MEMBER
2 POSTS

Hi thank you for your quick response. To answer your questions: The dash lights do stay on. It is not easy to restart, I have to wait awhile. Idle speed was around 2thousand rmps. I will have to get it started again and check that one again. And I am pretty sure that I hear the fuel pump. It is a very faint and high pitch noise. I can not hear it from the front but when I was at the LR of the vehicle and my wife turned the switch to on, I heard a very faint pitch for a few seconds and then it stopped. I tried it on my newer Honda and the fuel pump on that one sounded louder and had a different tone to it, so it is hard to tell if what I am hearing in the 93 is the same thing.

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Monday, December 16th, 2019 AT 10:33 AM

KHLOW2008

MECHANIC
41,814 POSTS

The prime suspect would be the fuel pump or the PGM-FI main relay.

On top of the fuel filter banjo nut there is a relief bolt. When engine could not start, release the bolt about 3 turns and turn ignition switch ON. If fuel does not gush out with high pressure, possibly then fuel pressure is the problem.

To test if the PGMfiMain relay is the cause, use jumper wire to bridge terminal # 2 ( Black/Yellow wire) and terminal #4 ( Yellow wire). Fuel pump is now bypassed and shoud come on when ignition switch is turned ON. Try starting and running engine.