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Idle odb2 values question

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Old 29 Dec 2013, 04:52 am
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Default Idle odb2 values question

Hello fellow PT cruiser owners. I currently own a 2002 PT Cruiser and I have a few questions that I would be grateful about if anyone could answer. (I also hope that this post could be helpful to others.)

Below are a few screen shots I've taken from an ODB2 scan tool that I've used on my car. My car was idle and parked while I gathered this information:

I understand most of the information present but I want to know if the values look normal.

I'm kind of concerned about the LTFT value, it seems a little bit high and I'm concerned that there is a potential problem like a vacuum leak.
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Old 29 Dec 2013, 10:05 am
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Default Re: Idle odb2 values question

Looking at the RPMs, I would say your ok on the vac leak. Nitro should know on the other reading.

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Old 29 Dec 2013, 12:49 pm
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Default Re: Idle odb2 values question

This means it's adding 10% fuel over what computer is programed.
Is it getting poor fuel economy?

Could be your conditions, cracked exhaust manifold or bad O2.

I'm not sure a vacuum leak would effect this- Closed loop uses the O2 sesnsor, not the MAP- MAP works in open loop.
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Old 29 Dec 2013, 01:21 pm
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Default Re: Idle odb2 values question

I would say replace the HO2 and also do a compression test. You will probably find normal wear nothing to get excited about? Even with these readings you would most likely pass the emission testing in California.
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Old 29 Dec 2013, 09:18 pm
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Default Re: Idle odb2 values question

But isn't a long term fuel trim of +/- 10% within spec? (Thanks for your quick replies by the way).
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