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Discussion Starter · #1 ·
<br><A HREF="http://forums.swedespeed.com/zerothread?id=58033" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=58033</A> <p>I wrote a topic about interrupted and gaspingly driving.After this the dealer changed the airflow sensor and adviced me to use not 100 octane and turned to 95 octan.<p>This weekend the problem again occured.<p>While crusing the engine is stumbling for a second;it is like something clogging.I do nothing and turn to normal after 1 second.It continues 5-6 times for 2-3 hours driving.<p>If I drive on highway at high speeds,it makes much more.Not too many in crowded city traffic.<p>ALSO:The engine symbol warning again started to seen on dash with this problem.<p>I am getting crazy,is the air flow sensor or something with 95 octane?<p>Did you have any experience about this?How will I solve this?<p>
 

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Re: HELP needed!Despite the airflow sensor changed,problem again occu ... (xenophobic)

Do you have a CAI?
 

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Discussion Starter · #3 ·
Re: HELP needed!Despite the airflow sensor changed,problem again occu ... (JRL)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JRL</b> »</i></TD></TR><TR><TD CLASS="quote">Do you have a CAI?</TD></TR></TABLE><p>No I don't have.I only have closed BMC filter.
 

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Re: HELP needed!Despite the airflow sensor changed,problem again occu ... (xenophobic)

try your stock filter ----- see if the CEL goes out or does NOT come back after reset. My car hates the BMC or JR filters for some reason and I know I'm nit the only one
 

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Re: HELP needed!Despite the airflow sensor changed,problem again occu ... (xenophobic)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>xenophobic</b> »</i></TD></TR><TR><TD CLASS="quote"><A HREF="http://forums.swedespeed.com/zerothread?id=58033" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=58033</A> <p>I wrote a topic about interrupted and gaspingly driving.After this the dealer changed the airflow sensor and adviced me to use not 100 octane and turned to 95 octan.<p>This weekend the problem again occured.<p>While crusing the engine is stumbling for a second;it is like something clogging.I do nothing and turn to normal after 1 second.It continues 5-6 times for 2-3 hours driving.<p>If I drive on highway at high speeds,it makes much more.Not too many in crowded city traffic.<p>ALSO:The engine symbol warning again started to seen on dash with this problem.<p>I am getting crazy,is the air flow sensor or something with 95 octane?<p>Did you have any experience about this?How will I solve this?</TD></TR></TABLE><p>if you can get ahold of and OBDII scanner see if the engine is throwing codes.... sounds a little like when my MAP (not MAF) sensor died....
 

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possible intermittent fuel pump? with the check engine light thrown, there should be stored codes for diagnosis.
 

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Discussion Starter · #8 ·
Re: (needsdecaf)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>needsdecaf</b> »</i></TD></TR><TR><TD CLASS="quote">Check his original post, his car is not showing codes.<p></TD></TR></TABLE><p>That is the point.The computer shows no error!No code or anything else.<p>Tha delaer is stuck at this point. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/mad.gif" BORDER="0">
 

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Re: HELP needed!Despite the airflow sensor changed,problem again occu ... (xenophobic)

From some of the issues I've seen on this site that are very similar to yours I would say it could be either<p>1) faulty fuel rail pressure sensor<br>2) boost solenoid valve<p><A HREF="http://forums.swedespeed.com/zerothread?id=51179" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=51179</A><br><A HREF="http://forums.swedespeed.com/zerothread?id=54778" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=54778</A><br><A HREF="http://forums.swedespeed.com/zerothread?id=53614&postid=494955#494955" TARGET="_blank">http://forums.swedespeed.com/z...94955</A>
 

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Re: (xenophobic)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>xenophobic</b> »</i></TD></TR><TR><TD CLASS="quote">That is the point.The computer shows no error!No code or anything else.<p>Tha delaer is stuck at this point. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/mad.gif" BORDER="0"> </TD></TR></TABLE><p>It's very unlikely that there will be no codes with the CEL on unless the ECM was reset. Looks like the next best bet is the fuel rail sensor as what IwantaS60R suggested. TCV failures tend to be more obvious especially when under acceleration where surging can be felt.<p>Did you consider trying a 3rd dealer?
 

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Discussion Starter · #11 ·
Re: (blot)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>blot</b> »</i></TD></TR><TR><TD CLASS="quote"><p>Did you consider trying a 3rd dealer?</TD></TR></TABLE><p>Yes I tried all the big dealers but the commo thing they say is"Very strange ,no codes!<br>At least we will try all the suspicious parts and see which one of them is faulty!"<p>Tomorrow they will change the fuel pressure sensor.
 

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Re: (xenophobic)

Try putting your catalytic converter back on?<p>You were the one who removed it, correct? Could be the 02 sensor(s) or lack of them messing with your fuel trims.
 

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Discussion Starter · #13 ·
Re: (StaggRLee)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>StaggRLee</b> »</i></TD></TR><TR><TD CLASS="quote">Try putting your catalytic converter back on?<p>You were the one who removed it, correct? Could be the 02 sensor(s) or lack of them messing with your fuel trims.</TD></TR></TABLE><p>Yes I removed it but the dealer checked the possible problems because of it and they said that it doesn't make a problem like this.At least I know that the converter is not the deal.
 

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Re: HELP needed!Despite the airflow sensor changed,problem again occu ... (IwantaS60R)

Xenophobic, I had a similar issue with my caR. Changing the "Fuel Rail Pressure Sensor" corrected it! If it had not been this sensor, my dealer was going to replace the "Boost Solenoid" next. So yes, I second what "IwantaS60R" said.
 

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Discussion Starter · #16 ·
At last today the car showed an error code:<br>"Fuel Pressure Sensor:High Signal"<p>I already went to dealer to try changing the fuel pressure sensor.I am lucky that while I was driving the car again lit the engine symbol.I reached the dealer and they connected to computer and the given warning was written.<p>They don't have the sensor and they ordered it and will wait for 1 week.I hope it will solve my problem.
 
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