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I have a 2001 Honda Civic with a 1.7 in it with a new fuel

Customer Question
pump when I go to...
I have a 2001 Honda Civic with a 1.7 in it with a new fuel pump when I go to start it it won't fire up unless I cycle the fuel pump a couple times it will fire right up
Submitted: 1 year ago.Category: Honda
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Answered in 38 minutes by:
9/24/2016
Mechanic for Honda: Matt, Engineer replied 1 year ago
Matt
Matt, Engineer
Category: Honda
Satisfied Customers: 22,434
Experience: Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
Verified

Hello

this sounds like the new pump may not be getting full power? so I'd start by by checking the wiring, fuse and relay for the fuel pump for any corroded joints or damaged wiring

if this is OK then try loosening off the fuel filler cap as if the 1 way valve in the filler cap is faulty then you may be generating a vacuum inside the tank which can then stall the pump

if this helps then replace the cap

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Customer reply replied 1 year ago
With the cap off dose not a difference once it starts it runs great
Mechanic for Honda: Matt, Engineer replied 1 year ago

Hello

This could be a wiring issue as things tend to expand when hot and its possible a poor or partial electrical connection is being pushed apart on one of the major sensors so check the connection plug and wiring to the following;

Airflow meter

Crank position sensor

Cam position sensor

O2 sensor

Throttle position sensor

unplug each in turn and use some switch / contact cleaner spray on the pins to ensure its all grease / dirt free

Also worth checking the connections to the fuel pump for the same reason - unplug each in turn and give them a good squirt of switch / contact cleaner - Not WD40

and also unplug and inspect the main power relays and fuses for signs of overheating or corroded terminals - so the ones for the ECU and the fuel pump

And also unplug the wiring loom connections in the engine bay one at time and inspect for corroded or recessed pins.

Check the resistance of the spark plug leads ( 13-15Kohm / metre) and replace if any doubt or high resistance - Also replace the spark plugs if any of them fail this checklist:

http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

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Mechanic for Honda: Matt, Engineer replied 1 year ago

Hi

do you still need help?

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Matt
Matt
Matt, Engineer
Category: Honda
Satisfied Customers: 22,434
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Experience: Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.

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