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2005 PT Cruiser Hesistation during acceleration

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Old 01 Feb 2018, 06:31 pm
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Exclamation 2005 PT Cruiser Hesistation during acceleration

I have a 2005 PT Cruiser Touring with 151K miles on it. Over the past several weeks I have had a problem with my cruiser. This only occurs every now and then but its scary because I don't want to get stuck on the side of the road at night coming home from school.
I have done the on/off on/off on to get codes to come across my odometer, The codes are for O2 sensor, Oil Pressure sensor, and Cam sensor.
The engine light has been on since I got the vehicle because of the O2 sensor. My father and uncle are trained mechanics and said that the O2 sensor would only cause more fuel usage. I was okay with that. But here's the problem I'm having now. (Even my father who was a transmission specialist at the local Chrysler dealership is puzzled)

I'll be driving down the road and all of a sudden my cruise will completely die. It wont even light up on the dash.
Then any time I try to accelerate it feels as if the car is not getting fuel. There is a heavy hesitation and it feels like a loss of power with RPM stuck at 2500. And it kind of jerks during the hesitation. Its done it to me twice during trips I would pull over wait ten minutes and then everything was fine.
Today it did it to me 3 times in 30 minutes.
I'm thinking from what I have read its the cam sensor. My father thinks its the transmission but he is only going by what I tell him he hasn't seen it happen. I don't particularly feel like its the transmission because I haven't heard gears grinding. Being a mechanics daughter and niece I do know how to diagnose some minor things and how to fix them.

But this has us all puzzled and the mechanic at the Chrysler dealership looked at me like I had two heads.

Please any help would be really appreciated. I can't afford to be without my car as im a full time student and the sole income in my family.
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  #2 (permalink)  
Old 01 Feb 2018, 09:02 pm
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Default Re: 2005 PT Cruiser Hesistation during acceleration

I am suggesting you have more than one problem. I would start with checking the camshaft wiring and if it is okay replace the camshaft sensor.

After you get that fixed check your battery cable connections. They might be loose or not making good connections. If tthey look good take the Pt Cruiser to an Aauto Parts store and have them do a battery load test.
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Old 02 Feb 2018, 12:38 am
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Default Re: 2005 PT Cruiser Hesistation during acceleration

After you check for power issues, try a replacement computer. I had the same problem where there was a notch in the powerband at the same RPM range.
Do you have power during the acceleration if your throttle is fully pinned to the floor ? Reason being, my symptom was it had no power from 1800-2500 rpm at 99% throttle or less.

I don't advice replacing sensors and controls if there isn't just reason to do it. If there is a problem with a sensor more than likely the computer will give a specific code that can give you a clue to where to look. Not having a quality scan tool is going to make your life miserable and difficult to solve this problem. You need to get more details about those codes, including active, intermittent, and freeze frame data. Clear the codes, go drive as usual, and read them again after the drive cycle.
The cam, oil and O2 sensors are on the same wiring harness, I believe. Sensors can be tested for resistance and the voltage values the computer sends to it. If they themselves are within tolerance, move on to another cause and don't second guess yourself. You would need the alldata for your model year, and print out the troubleshooting guides for each code and follow them.

If it's not sensors or wiring, you would very likely have to get a used, remanufactured, or new computer depending on how much you are willing to spend, and have it fully programmed to your VIN code before installation. It is very common to encounter strange computer problems once these cars start to get around 10-15 years old
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Last edited by _PTGT03; 02 Feb 2018 at 12:47 am.
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Old 05 Feb 2018, 10:42 pm
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Default Re: 2005 PT Cruiser Hesistation during acceleration

Bad battery? Bad battery connection? Bad ignition switch? Sometimes it is the small, simple things. When the Boeing 767 was first introduced into service, there were a lot of alerts for various black boxes and electronic things being "bad". They would be removed and replaced, only to discover that it was a bad cable pin connector, or a short because a cable in the loom was stretched too tight.....
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