CEL light blinking when accelerating at higher speeds.
So this is a bit long, but I'll start with the current symptoms. Basically when I hit the highway at accelerate above 60, the CEL light starts flashing. The vehicle is also misfiring at lower speeds.
The long story is - My catalytic converter was clogged so I removed it out of desperation to get the vehicle running. It worked. A few weeks later, because of the noise from the exhaust, I reattached the pipes to the muffler, but I had only the downstream O2 sensor connected since the upstream O2 sensor was disconnected. 2 days later, the vehicle starts misfiring and running rough. I disconnected the pipes from the muffler again, and removed the muffler. The vehicle still ran rough. I eventually had everything, including a new muffler welded on. I did not install a catalytic converter because of cost. I had both sensors installed and everything welded up nicely. The vehicle runs a little better but still misfires at low speed and flashes the CEL when running at higher speeds. Could this problem be exhaust related? Like if I install a new cat will the vehicle run better? Is it possible when I reattached the pipes to the muffler that this damaged my spark plugs? Thanks. Hope I make sense. |
Flashing CEL is telling you the PCM knows the engine is misfiring. Clogged cat tends to foul spark plugs, especially on 6 and 8. How old are yours? Cap? Rotor? Wires??
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Originally Posted by HeyYou
(Post 3574517)
Flashing CEL is telling you the PCM knows the engine is misfiring. Clogged cat tends to foul spark plugs, especially on 6 and 8. How old are yours? Cap? Rotor? Wires??
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The only time I had a flash CEL is when I totally lost #4 injector
also a clogged cat will do it too |
Originally Posted by Dodge_USA_Dude
(Post 3574608)
plugs, cap, rotor and wires are about 30-40k miles old. Right now, I’m gonna pull my plugs and see if they are fouled and check the wires too. If they seem fouled I’m going to add a new catalytic converter and replace the plugs and whatever else needs replacing.
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