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Fuel pump priming is delayed it takes 5 or more minutes for the fuel pump to actually turn on

Tiny
LEX9614
  • MEMBER
  • 1994 HONDA CIVIC
My fuel pump priming is delayed it takes 5 or more minutes for the fuel pump to actually turn on. It really just depends if the car has been sitting for hours on how long it takes to start. I replaced the fuel pump relay after jumping it off today and it did not fix the problem. I also pulled my fuel pump out completely and tested it today. It seems to be fine but my car still will not start up immediately. What could the problem be? Please help.
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Friday, December 14th, 2012 AT 12:27 AM

10 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the ECM, remove it and check for signs of leaking capacitors.
Does the Check Engine Light turns off after 2 seconds?
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+3
Friday, December 14th, 2012 AT 1:00 PM
Tiny
LEX9614
  • MEMBER
  • 7 POSTS
No once it starts the check engine light stays on. The light only cuts off once my fuel pump cuts on then once I crank the car it will cut on again. Does that have something to do with the problem? And thank you for answering my question ill check the ECM when I get time this week.
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Saturday, December 15th, 2012 AT 6:18 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Yes, for this model when the ECM fails intermittently, it would affect the PGM-FI main relay ( which you mentioned having replaced) and fuel pump operations.

Did you check for trouble codes?
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Saturday, December 15th, 2012 AT 1:21 PM
Tiny
LEX9614
  • MEMBER
  • 7 POSTS
No I did not check trouble codes where could I find them at?
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Saturday, December 15th, 2012 AT 4:06 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
https://www.2carpros.com/articles/honda-car-1990-1995-obd1-code-retrieval-procedure-and-definition-table

Check the above link for more information.
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Saturday, December 15th, 2012 AT 7:15 PM
Tiny
LEX9614
  • MEMBER
  • 7 POSTS
Ok thank you if I have any futher quetions ill ask you. Thanks for the help. I hope I can fix it soon.
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Saturday, December 15th, 2012 AT 7:29 PM
Tiny
GEOMEDRANO73
  • MEMBER
  • 6 POSTS
Hey guys, how's it going? I have the same problem with my 1994 Honda Civic, I did have a check engine light too but turned out to be a temperature sensor. I fixed it but my car still has the same problem where it take a long time to start. Any Ideas?
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Sunday, August 13th, 2023 AT 2:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,624 POSTS
It sounds like the fuel filter is clogged, have you changed it? Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/how-to-change-a-fuel-filter

This guide may help as well:

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

Check out the images (below). Please let us know what happens.
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Monday, August 14th, 2023 AT 12:07 PM
Tiny
GEOMEDRANO73
  • MEMBER
  • 6 POSTS
My fuel filter was changed with the fuel pump.
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Monday, August 14th, 2023 AT 1:11 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,624 POSTS
Did you service the throttle body? Also, I would check for vacuum leaks.

Please go over the guide:

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

Please go over this guide and get back to us.
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Tuesday, August 15th, 2023 AT 8:33 AM

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