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HondaPlatinum
HondaPlatinum, A Technician
Category: Honda
Satisfied Customers: 11332
Experience:  13 year honda platinum level
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2003 odyssey. Barely starts runs rough and dies. No engine

Customer Question

2003 odyssey. Barely starts runs rough and dies.
No engine codes. New fuel pump and relay. Have spark all plugs,checked DTC manually,OK. Compression test 220psi all cylinders. Ran injector cleaner through all injectors.
No change.
Submitted: 6 months ago.
Category: Honda
Expert:  MASTER TECH replied 6 months ago.

Hello welcome to just answer I am master tech and will be able to assist you today.

I would like to do a quick test.

if you can unbolt the EGR valve and place a business card under it blocking both ports and then re tighten it then see if it will start of remain the same.

Customer: replied 6 months ago.
I will try this tonight. I know the van seems to be running rich...too much gas.
Customer: replied 6 months ago.
I tried blocking the egr but no difference.
Expert:  MASTER TECH replied 6 months ago.

ok

Expert:  MASTER TECH replied 6 months ago.

how are the plugs ?

brand /gap ?

Customer: replied 6 months ago.
Brand new gapped correctly. NGK
Gas pressure 45psi when first starts drops to 25psi after running.
Expert:  MASTER TECH replied 6 months ago.

when you disconnect the vacuum line what does it go to ?

Customer: replied 6 months ago.
Drops to 20 psi.
Vacuum is 17 inHG
Expert:  MASTER TECH replied 6 months ago.

oh really ?

Expert:  MASTER TECH replied 6 months ago.

here are the pressure specs

Customer: replied 6 months ago.
Does run a little better with egr blocked egr
Expert:  MASTER TECH replied 6 months ago.

how much better ?

cause the fact now codes and we have known issues with the egr valves sticking and causing the valve to stick open and cause these conditions.

drive it and see cleans out

Customer: replied 6 months ago.
I can't drive it ,as soon as i give it gas it dies
Expert:  MASTER TECH replied 6 months ago.

ok from your readings its got no fuel pressure.

I would be looking at the fuel pump as a failing issue as of now

Customer: replied 6 months ago.
It seems like it is surging when idleing
Customer: replied 6 months ago.
Rpm goes from 900 to 1500
Customer: replied 6 months ago.
Code 505 came up.
Expert:  MASTER TECH replied 6 months ago.

ok lets dry to isolate one problem first.

lets work on the fuel problem first.

I would make sure their is no blockage in the fuel lines and then if they are all clear

Expert:  MASTER TECH replied 6 months ago.

that is for the idle air control valve.

Customer: replied 6 months ago.
Gas is staying at about 40psi rpm 1500
When i give it gas drops to 15-20
Expert:  MASTER TECH replied 6 months ago.

ok then either the filter is plugged or the pump is going bad

Customer: replied 6 months ago.
Drained gas tank. This is the second fuel pump. Only filter i could find was attached to the bottom of the fuelpump
Customer: replied 6 months ago.
Is there another filter i don't know about?
Expert:  MASTER TECH replied 6 months ago.

no not on this

Customer: replied 6 months ago.
Why is the car surging. What tells the engine to accelerate up and down
Expert:  MASTER TECH replied 6 months ago.

because the idle air control valve is hunting.

check the coolant level

Customer: replied 6 months ago.
Coolant level full
Expert:  MASTER TECH replied 6 months ago.

ok then the system is getting more air then it was programmed. possible dirty throttle body holding the throttle plate open more then required. or a failing IACV valve.

Expert:  MASTER TECH replied 6 months ago.

im signing off for the night I have to get up early for work.

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