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Would a bad primary O2 sensor cause rough starts?

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Old Jan 10, 2004 | 10:56 AM
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Default Would a bad primary O2 sensor cause rough starts?

In the morning I find it hard to get my car to idle till it warms up a little. I am running Hondata S200.
I think it is possible that my wiring or the Primary O2 sensor is faulty but I want to be sure before buying or acquiring another one.
I had to extend the wiring for the O2 sensor to reach the Primary bung on my comptech race header.
I do throw a CEL, but it only comes on after I have been driving for and hour or so.
Any Ideas??? I will check my codes and find out what it really is.
Thanks.
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Old Jan 10, 2004 | 12:07 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (MISFIT)

could be sub 0 temp . at least in pa
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Old Jan 10, 2004 | 12:30 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (seek167)

Think I heard or read somewhere that Hondata doesn't make use of the intake air temp sensor, which I though might have been part of the problem.
Noticed it when starting up my turbo in the cold, and I was also running the S200.
I'm sure the 850 cc injectors didn't help any either but it started and idled fine when it was warmer.
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Old Jan 10, 2004 | 12:31 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (zygspeed)

that is my problem exactly. Only RC 310's here though did you throw the CEL though?
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Old Jan 10, 2004 | 12:35 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (MISFIT)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MISFIT &raquo;</TD></TR><TR><TD CLASS="quote">Only RC 310's here though did you throw the CEL though?</TD></TR></TABLE>

Nope.
ABS light was on though.
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Old Jan 10, 2004 | 02:12 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (MISFIT)

02 sensor is not functional on start up, cranking and stating fuel is all done by ECU no signal from )2 is given until it reaches min temp.
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Old Jan 10, 2004 | 02:36 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (seek167)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by seek167 &raquo;</TD></TR><TR><TD CLASS="quote">could be sub 0 temp . at least in pa </TD></TR></TABLE>
yeah definitely. if it won't start on the first turn. wait about 20 sec, and go again.. it'll start just fine.
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Old Jan 10, 2004 | 03:34 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (MISFIT)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MISFIT &raquo;</TD></TR><TR><TD CLASS="quote">In the morning I find it hard to get my car to idle till it warms up a little. </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tekkynikality &raquo;</TD></TR><TR><TD CLASS="quote">... if it won't start on the first turn. wait about 20 sec, and go again.. it'll start just fine.</TD></TR></TABLE>

Who said anything about NOT STARTING?
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Old Jan 10, 2004 | 04:56 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (zygspeed)

It always starts.... Its just like there is a lot of sputtering and low lumpy idle till it warms up for about 1 minute. then about an hour later the CEL comes on. I have no idea.
It is too God Damn cold to go out right now and check the CEL. I will do that when it turns Warmer
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Old Jan 11, 2004 | 12:07 AM
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Default Re: Would a bad primary O2 sensor cause rough starts? (zygspeed)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zygspeed &raquo;</TD></TR><TR><TD CLASS="quote">Think I heard or read somewhere that Hondata doesn't make use of the intake air temp sensor, which I though might have been part of the problem.
Noticed it when starting up my turbo in the cold, and I was also running the S200.
I'm sure the 850 cc injectors didn't help any either but it started and idled fine when it was warmer.</TD></TR></TABLE>

I heard the same thing, Hondata starts hard in the cold (&lt;20 deg?). I did not know it was the lack of using the intake air temp sensor tho.
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Old Jan 11, 2004 | 08:29 AM
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Default Re: Would a bad primary O2 sensor cause rough starts? (Ill)


yea i got thats same problem with my hondata s100 but no CELs. when i first start it up, its feels like its going to shut off until about 20 secs. im guessing its the cold *** weather.
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Old Jan 11, 2004 | 08:35 AM
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Default Re: Would a bad primary O2 sensor cause rough starts? (MISFIT)

we should check the resistance of the wiring and perhaps resolder

I was having a hard time getting the solder to stick when I did it...and then it got dark

pull that CEL with the paperclip like we chatted about
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Old Jan 11, 2004 | 09:49 AM
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Default Re: Would a bad primary O2 sensor cause rough starts? (zygspeed)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zygspeed &raquo;</TD></TR><TR><TD CLASS="quote">Think I heard or read somewhere that Hondata doesn't make use of the intake air temp sensor, which I though might have been part of the problem.</TD></TR></TABLE>

Ummm, the ecu cant provide proper fueling without using the IAT.
Where did you get that from?
Try to confirm information before posting.
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Old Jan 11, 2004 | 11:53 AM
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Default Re: Would a bad primary O2 sensor cause rough starts? (sgT)

If I run into any probs steve i will call you right up. Still too cold to check the damn CELs today. Its been this way for a month now. I guess I will wait some more.
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Old Jan 11, 2004 | 11:03 PM
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Default Re: Would a bad primary O2 sensor cause rough starts? (rtype11)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rtype11 &raquo;</TD></TR><TR><TD CLASS="quote">02 sensor is not functional on start up, cranking and stating fuel is all done by ECU no signal from )2 is given until it reaches min temp. </TD></TR></TABLE>

This is correct.

Misfit: if we can look at thecar while its cold, I might be able to do something about it.
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Old Jan 12, 2004 | 01:26 AM
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Default Re: Would a bad primary O2 sensor cause rough starts? (sgT)

nice. I willl give you a call this week. or IM you.
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