WOT, Check Engine Light, error codes?

nyclad · 11-07-2009, 11:44 AM

Hey all,

When I hit WOT at about 30 mph I lose power, ruff idle, CEL with the following codes: p0300, p0303, p0305. A few hours later, and after clearing the codes, the car will drive like nothing ever happened. I drove the car for a week without any problem as long as I didn't hit WOT. Yesterday morning I Hit WOT just to see if the problem was still there, and just as I thought, the problem came back, same symptoms and same codes. Fortunately, I was still able to drive to work and park the car. Eight hours later car started fine no problem at all.

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nyclad · 11-19-2009, 03:47 PM

Any ideas?

Benz-O-Rama · 11-19-2009, 04:14 PM

You're having an engine misfire at WOT. Specifically, cylinders 3 and 5. I'd start by confirming a secure connection of plug wires. Also, how many miles on your car? You might need to change plugs and/or coil packs.

http://www.obd-codes.com/p0300

http://www.obd-codes.com/p0303

http://www.obd-codes.com/p0305

nyclad · 11-19-2009, 10:23 PM

Hey Benz-O-Rama,

Thanks for responding. I have 98,200 miles on my car, changed all the spark plugs July of this year. I'll check the wires tomorrow, hit WOT and see what happens.

Thanks!

Pekkle · Yesterday, 12:44 PM

Sorry!

What is WOT?

nyclad · Yesterday, 01:40 PM

Wide Open Throttle

11-19-2009, 04:14 PM	#3
Benz-O-Rama MBWorld Fanatic! Join Date: Apr 2006 Location: Maryland Posts: 4,306 Drives: 2001 C240, Eurocharged Stage (1) 2004 E500, Eurocharged Stage (1) 2005 SL600, 2006 R500	You're having an engine misfire at WOT. Specifically, cylinders 3 and 5. I'd start by confirming a secure connection of plug wires. Also, how many miles on your car? You might need to change plugs and/or coil packs. http://www.obd-codes.com/p0300 http://www.obd-codes.com/p0303 http://www.obd-codes.com/p0305 __________________ 2004 Eurocharged E500 - Eurocharged ECU, VRP headers and E55 exhaust. #1 record holder on dragtimes (13.49@102.5 w/2.0 60') 2005 Eurocharged SL600 - Stock with only Eurocharged ECU. #4 record holder on dragtimes (11.55@120.20 w/ 1.79 60' on All-Season's. MY WHEELS ARE FOR SALE! CLICK ME! Sig by Shake Last edited by Benz-O-Rama; 11-19-2009 at 04:24 PM.

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11-19-2009, 03:47 PM	#2
nyclad Junior Member Join Date: Dec 2004 Location: Bronx NY Posts: 24 Drives: 2003 E320	Any ideas?

11-19-2009, 10:23 PM	#4
nyclad Junior Member Join Date: Dec 2004 Location: Bronx NY Posts: 24 Drives: 2003 E320	Hey Benz-O-Rama, Thanks for responding. I have 98,200 miles on my car, changed all the spark plugs July of this year. I'll check the wires tomorrow, hit WOT and see what happens. Thanks!

Yesterday, 12:44 PM	#5
Pekkle Member Join Date: Jun 2008 Location: Los Angeles, CA Posts: 101 Drives: 2007 E550 Sports	Sorry! What is WOT?

Yesterday, 01:40 PM	#6
nyclad Junior Member Join Date: Dec 2004 Location: Bronx NY Posts: 24 Drives: 2003 E320	Wide Open Throttle

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