Question about Cars & Trucks
Here's a thought that I haven't heard mentioned yet. It's quite possibly the oil presure sensor near the oil filter. It's a safety feature I believe. So that if your in an accident and the motor stops That sensor tells the ECM to stop pumping fuel
Posted on Mar 02, 2015
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Posted on Jan 02, 2017
The cylinder 7 misfire is likely a symptom of the problem, not the problem itself.
Typically, the catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream 02 sensor reading should be fairly steady. Typically the P0420 code triggers the check engine light if the readings of the two sensors are similar. This is indicative of (among other things - such as faulty sensors in the "emissions loop") a converter that is not working as efficiently as it should be.
I do not believe that it is a problem with a valve/head gasket or cam.
Posted on Jan 13, 2009
It sounds as if you have a small vacuum leak some where in the intake system. Also since you cleaned the throttle body also clean the MAS. It is located between the air filter housing and the throttle body. Hope this helps, rate me highly.
Posted on Feb 07, 2009
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