Mechanics

ENGINE MISSFIRES...EGR VALVE???? FUEL PUMP????

Honda Accord

1999 honda accord 4 cyl vtec 130000
i had error codes read, said the engine is missfireing, I changed the plugs and wires. Next thing I was told to check was the egr valve, and the fuel filter. Found out there is no fuel filter to change, but there is a pump. And then was told I shouldnt do this myself. Is it that bad? The car runs but it shakes bad. Please any help out there?
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BigJ2007
August 21, 2007.



What code/s are they?

Rasmataz
Aug 21, 2007.
What code/s are they?[/Quote]

they are p0302, p0304, p0401, p0300, p1399, p0401. I cleared all of them ran it again for 5 min and scanned it again now it has P0302, P1399. What should I do?

Tiny
BigJ2007
Aug 23, 2007.
They are p0302, p0304, p0401, p0300, p1399, p0401. I cleared all of them ran it again for 5 min and scanned it again now it has P0302, P1399. What should I do?[/Quote]

1399 is your engine diesel?

Open up the EGR inspect/clean/test-rescan it and comeback

Rasmataz
Aug 23, 2007.
1399 is your engine diesel?

Open up the EGR inspect/clean/test-rescan it and comeback[/quote]

no its a 4 cyl vtec. Im gonna go try right now, what should I be looking for? Buildup?

Tiny
BigJ2007
Aug 23, 2007.
No its a 4 cyl vtec. Im gonna go try right now, what should I be looking for? Buildup?[/Quote]

Carbon build up check the passages also make sure its getting vacuum

Rasmataz
Aug 23, 2007.
Carbon build up check the passages also make sure its getting vacuum[/quote]

i cleaned it out there was a lot of carbon, didnt help any, rescanned, p0300, p0301, p0304, p1399. Where should I look to check the vacuum?

Tiny
BigJ2007
Aug 23, 2007.
I cleaned it out there was a lot of carbon, didnt help any, rescanned, p0300, p0301, p0304, p1399. Where should I look to check the vacuum?[/Quote]

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

Rasmataz
Aug 24, 2007.
Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.[/Quote]

well I changed the egr valve, no dice. Ill check the compression and fuel pressure. If its the compression, what would be my next step?

Tiny
BigJ2007
Aug 24, 2007.
Well I changed the egr valve, no dice. Ill check the compression and fuel pressure. If its the compression, what would be my next step?[/Quote]

I would say concentrate on the fuel in your situation

Rasmataz
Aug 24, 2007.
Well I changed the egr valve, no dice. Ill check the compression and fuel pressure. If its the compression, what would be my next step?[/Quote]

I would say concentrate on the fuel in your situation

Rasmataz
Aug 24, 2007.
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