I was driving and all of a sudden lost power... like im driving a 4 cyl. Sounds like a honda bouncing off the rev limiter under throttle. Although it sounds just fine while idling. My friend put it on a snapon scanner showed that it has a misfire in number 1 and 3 cylinders. Under LS1 edit we found out bank one O2 sensor was bad. Replaced them, the plugs, wires, and reset the codes. I left her sit overnight without the battery connected. Started it up today and still the same problem but no error codes anymore. Any Idea what the hell I did?

-Conor

 

i'm assuming it still misses.hook up your scanner and look at your misfires.if it is still on cylinders 1-3.check compression,etc.and work your way from there.

 

Are you saying that if you put your car in gear and press on the gas pedal that the car won't move but the rpm's increase?

Do you have an automatic transmission?

If so, it's time for a rebuild

 

No, the car still drives fine. In fact I drove it home from when it initially started to misfire. We haven't put it back on the scanner so I don't know if the same cylinders are misfiring.

 

Ok, If it's still misfiring on the same cylinders then you probably need to look at the valve springs.

 

Ok Ill check it out again tomarrow. Thanks

 

Some guidelines to go by from the manual when checking for cutouts/misses.


General Prelim.
· Check the PCM grounds for being clean, tight and in their proper locations. Refer to PCM wiring diagrams .

· Remove the air filter element and check for dirt or for being restricted. Replace as necessary.


Fuel System
· Perform the injector balance test.

· Check for a low fuel pressure condition.

· Check for a restricted fuel filter.

· Check for a contaminated fuel condition.

· Check items which can cause an engine to run rich (long term fuel trim near -13%). For a rich condition, refer to DTC P0132 HO2S Circuit High Voltage Bank 1 Sensor 1 and DTC P0152 HO2S Circuit High Voltage Bank 2 Sensor 1 .

· Check items that can cause an engine to run lean (long term fuel trim near 23%). For a Lean condition, refer to DTC P0131 HO2S Circuit Low Voltage Bank 1 Sensor 1 and DTC P0151 HO2S Circuit Low Voltage Bank 2 Sensor 1 .

Sensor System
· Use a scan tool in order to monitor the KS system for excessive spark retard activity.

Ignition System
· Wet down the secondary ignition system with water from a spray bottle. Wetting down the secondary ignition system may help locate damaged or deteriorated components. Look/listen for arcing or misfiring as you apply water.

· Check for proper ignition voltage output with spark tester J 26792 .

· Remove the spark plugs and check for the following: o Correct heat range.
o Wet plugs
o Cracks
o Wear
o Improper gap
o Burned electrodes
o Heavy deposits

· An improper spark plug gap will cause a driveability problem. Do the spark plug gapping using a wire gauge gap tool. Determine the cause of the fouling before replacing the spark plugs if the spark plugs are gas or oil fouled. Refer to DTC P0172 Fuel Trim System Rich Bank 1 and DTC P0175 Fuel Trim System Rich Bank 2 for diagnosis of the rich condition or Engine/Engine Mechanical for diagnosis of the oil fouling condition.

· Visually/Physically inspect the Secondary ignition for the following:
o Ignition wires for cross firing
o Ignition wires arcing to ground
o Ignition wires for proper routing
o Ignition coils for cracks or carbon tracking

Engine - Mechanical
· Check engine mechanical for the following:
o Check compression
o Sticking or leaking valves
o Worn camshaft lobes
o Valve timing
o Bent push rods
o Worn rocker arms
o Broken valve springs
o Excessive oil in combustion chamber-Leaking valve seals
o Low cylinder compression

· For incorrect basic engine parts. Inspect the following:
o Camshaft
o Cylinder heads
o Pistons, etc.

Exhaust System
· Check exhaust system for possible restrictions. Check for the following:
o Inspect the exhaust system for damaged or collapsed pipes.
o Inspect the exhaust manifold for a collapsed inner wall.
o Inspect the mufflers for heat distress or possible internal failure.