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Half of the Engine Shuts Off

343 Views 19 Replies 4 Participants Last post by  RobV
Got an intermittent problem, I first thought it was the passager's side aftermarket catalytic converter that clogged the exhaust but it was not. I suspect an electrical problem (coil pack or else) but could it be a fuel issue?

The right side the the V10 seems to work on 1 or 2 cylinders or even shuts off entirely. Under load, when I floor the gas pedal it starts to run again. Can't pinpoint anything related to heat or humidity, it's random.

Any idea to where to look first?
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Any codes set? A cat would plug from running too rich, then begin to overheat. I would suspect the injectors are firing, but the ignition side is problematic. Any difference in the plug condition?
You would get misfire codes. Rich codes too if fuel entering.

Remember that it is a wasted spark system.
yes, 2 codes

PO152
PO137

but these can be for anything related to O2 sensors, cats, etc...

so far, I'm thinking the coil pack(s) could be the cause but I'm not sure
I also changed the spark plugs, problem still there.
If you are convinced that there are cylinders not firing, you can pull plug wires one at a time to see if it makes the engine run worse or not. You can also check the spark on that wire while you have it off to see if the coil is in fact firing or not.
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apparently, the problem is the upstream oxygen sensor. Already ordered, will try that
changed the upstream oxygen sensor, problem still there. Codes reappears after a little while, but no misfire reading.

I also noticed that my dashboard and radio lights are flickering, so maybe it's all related to an electrical problem. I don't know where to start looking though
O2 sensors will not shut down the cylinders. You replaced it for no reason.

From the voa i think you have a paxton and are in montreal.
The #1 cause of nearly every electrical gremlin on these cars is nothing more than a weak battery. If you haven't replaced it in the last 36 months I strongly recommend you do that before going any further.
O2 sensors will not shut down the cylinders. You replaced it for no reason.

From the voa i think you have a paxton and are in montreal.
Yeah I followed the local mechanic advice (who doesnt know anything about Viper) and since my ''Viper mechanic) is about 70 miles from where the car is at the moment, I'm hesitant to drive it there on 5 cylinders

edit: N/A and close to Montreal yes
The #1 cause of nearly every electrical gremlin on these cars is nothing more than a weak battery. If you haven't replaced it in the last 36 months I strongly recommend you do that before going any further.
The battery is new actually, but it may worth a try, maybe it's faulty
while at it, maybe it's the alternator that is faulty...
measure the voltage of the battery with car off (~12V) and then with car running (~13-14V).
Yeah I followed the local mechanic advice (who doesnt know anything about Viper) and since my ''Viper mechanic) is about 70 miles from where the car is at the moment, I'm hesitant to drive it there on 5 cylinders

edit: N/A and close to Montreal yes
he also doesn't know about cars in general then.
measure the voltage of the battery with car off (~12V) and then with car running (~13-14V).
12.46 volts
14.02 volts (stable)

also changed all the spark plugs (OEM Champion), wires are new

flickering in the dashboard lights is just a bad connection in the steering console, I don't think it could be related at all

I cleared all the codes again (PO137 PO152) and I'll see how it goes, but so far I noticed the car seems A1 on cold start but as soon as it get just a little warm the problem begins
it's very annoying, can't pinpoint where the problem could be. I'm not even sure it's the ignition, maybe it's the fuel system, or maybe it's the tune? some kind of corrupted SCT file if that is even possible? But it was running fine for several days...
he also doesn't know about cars in general then.
The way he explained it, the computer was trying to compensate based on the sensor's info

was a bit surprised that the computer could shut off cylinders entirely, but eh I'm not mechanic myself and the sensor was 70 bucks
The way he explained it, the computer was trying to compensate based on the sensor's info

was a bit surprised that the computer could shut off cylinders entirely, but eh I'm not mechanic myself and the sensor was 70 bucks
Just be warned that it is recommended by other Viper owners and service guys that you should use OEM/Mopar O2 sensors not aftermarket.

I can not speak personally on that but search the forums, etc. I don't see the difference in a good O2 sensor vs OEM but that is me.
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