98 Accord V4 EX Coupe AT driving me nuts' please help... - Honda-Acura.net

heyfunny · 09-30-09, 09:16 PM

I got this car about 10 months ago and i am stuck with issues that make me afraid to drive it.

The main issue at the moment is this:
Almost every morning I start it up and head to work sometimes it starts to hesitate and stumble at higher RPM's like its running out of gas (tapping the gas does nothing) and it finally stalls.
Before it would only do this at higher speeds like with cruise control set on 55 or 60. Back then I was also getting a Vtec Malfunction error which was a clogged Oil Pressure Sensor Screen thing in the Vtec.
After that was replaced it was running great for a while then it started cutting out again but only at higher speeds especially going flat out.
The other day after filling up on my way home it stalled and wouldn't restart for a while then when it did and I was able to get it up to like 25 it back fired and then back fired again pulling into my driveway as well as stalling.

So far..... Since I got the car early this year this has been done...

New Timing Chain / Water Pump
New right rear wheel Bearing
New Coolant hoses
New Radiator Cap
New Battery
New Belts
New Vtec Gasket & Screen (All other Vtec Parts Checked out fine)
Oil Change, Air Filter, Oil Filter (Full Synthetic High Mileage) every 3000 mi.
New Plugs (NGK) and Wires
New Cap & Rotor
New Front HO2 Sensor
New Cat Conv.
New Transmission (Not Used, 100% Rebuilt w/2 yr warranty) ($3250) yikes!

It has 181000 mi on it

What the hell is wrong with my car??

I am getting sick of driving the POS standby I have to use till this one is fixed lol.

I am getting a CEL code P0420

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xpragmaticx · 10-05-09, 11:10 AM

If at high rpm you are stalling? Could be fuel pump.

speedy888 · 10-11-09, 02:58 AM

Is your CEL on? Check your EGR Passage it maybe clogged. If the EGR passage is clogged it will cause engine hesitation.

heyfunny · 10-13-09, 10:24 AM

I am getting a CEL code P0420
And it is stalling all the time now,... Yesterday I couldn't get it started again while driving it to a shop

strykernyc · 10-13-09, 10:46 PM

o2 sensors? it's definitely emission related
why not take it to the dealer?

flyromeo3 · 10-14-09, 11:24 AM

0420 is rear 02 sensor.

backfire could be due to car running tooooooo lean at higher speeds.

Have you checked the fuel pressure? Also, you may want to replace the fuel pump filter is its never been done before.
supposedly honda states you dont ever need to replace it.
I replaced mine at 130k miles and lets just say it was dirty dirty dirty.

but yeah,,sounds like your fuel pump might not be working at its fullest.
higher RPMS' = more fuel needed.

speedy888 · 10-16-09, 03:02 AM

P0420 is a code that means the catalyst system efficiency below is threshold. The catalytic converter has deteriorated and needs to be replaced.

flyromeo3 · 10-16-09, 02:00 PM

Quote:

Originally Posted by speedy888

P0420 is a code that means the catalyst system efficiency below is threshold. The catalytic converter has deteriorated and needs to be replaced.

well, the CEL could trigger a 0420 if F.P is sub par at higher RPM's

10-05-09, 11:10 AM	#2
xpragmaticx chipedge Join Date: Nov 2005 Location: Niles, Michigan Posts: 43	Fuel pump maybe? If at high rpm you are stalling? Could be fuel pump.

10-13-09, 10:24 AM	#4
heyfunny Junior Member Join Date: Dec 2008 Location: IA Posts: 8	I am getting a CEL code P0420 And it is stalling all the time now,... Yesterday I couldn't get it started again while driving it to a shop __________________ http://fc77.deviantart.com/fs39/f/20...y_heyfunny.jpg My 1998 Honda Accord EX Coupe V4 AT ^_^

10-14-09, 11:24 AM	#6
flyromeo3 Join Date: Jan 2004 Location: Queens NY Posts: 6,621	0420 is rear 02 sensor. backfire could be due to car running tooooooo lean at higher speeds. Have you checked the fuel pressure? Also, you may want to replace the fuel pump filter is its never been done before. supposedly honda states you dont ever need to replace it. I replaced mine at 130k miles and lets just say it was dirty dirty dirty. but yeah,,sounds like your fuel pump might not be working at its fullest. higher RPMS' = more fuel needed. __________________ 2006 Acura TL 2000 Audi S4

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10-11-09, 02:58 AM	#3
speedy888 Junior Member Join Date: Sep 2009 Location: Paradise Posts: 18	Is your CEL on? Check your EGR Passage it maybe clogged. If the EGR passage is clogged it will cause engine hesitation.

10-13-09, 10:46 PM	#5
strykernyc Senior Member Join Date: Apr 2003 Location: new york city Posts: 3,160	o2 sensors? it's definitely emission related why not take it to the dealer?

10-16-09, 03:02 AM	#7
speedy888 Junior Member Join Date: Sep 2009 Location: Paradise Posts: 18	P0420 is a code that means the catalyst system efficiency below is threshold. The catalytic converter has deteriorated and needs to be replaced.