I have a 02 Concorde with a 2.7

The check engine light is on. took it to auto zone to pull the code with the scanner tool. No code was found.

I had a code last week for a misfire in cylinder 1. Replaced the coil pack, that code was cleared.

Any input on what might be making the check engine light stay on would be great

Thanks

 

if the light is on there is a code go to different place see if they can get there cheap scanner to hook up to it

 

I'm experiencing the same problem now with a Concorde 2002. Check engine light on (O2 sensor codes) after changing O2 sensors and coils, experienced misfire cylinder 1. But keep losing power when accelerating out of low rpm and steady throttle (2/3 gear), only when engine is warm already. What did you do to fix the problem?

Thanks in advance!

 

What brand O2 sensors were used? Mopars like NTK, Denso, and OEM. Bosch sensors are a hit/miss proposition and should be avoided. It is

What codes are you seeing? Actual p-codes please.

How many miles on the plugs and were NGK or Champions used? The OEM plugs are good for 100k miles so really no need to use any other brand/type.

Try moving the coil pack to another plug to see if the misfire follows the coil or stays with the plug. Move the plug to another cylinder to determine if the misfire follows the plug.

 

Concorde 2002 3,5L V6 (58,000 miles). Vacuum leaks and coil (cylinder 1) have been fixed. After that still experienced misfire cylinder 1 (p.0300 and p301). Spark plugs and oxygen sensor (asked my mechanic what brand) were replaced. Check engine light keeps coming back on.

Now => O2 sensor codes -- p0030, p0036, p0050, p0056.

When engine is cold, there is no problem (although this morning it kind of choked). When engine hot, after restarting, I lose power when accelerating out of low rpm and steady throttle (2/3 gear). As if he's choking. After I have pulled it through the "choking" part (giving it extra fuel), it seems to recover and give no problem. Until I restart the engine.

Any ideas?