Drillslinger Posted February 1, 2005 Report Share Posted February 1, 2005 There's a lot of folks who've had their MAF sensors go bad.... but does anyone know what the symptoms of a faulty MAP sensor would be?? Correct me if I'm wrong, but the 1.8T should have the MAF at the airbox, and then the MAP on the IC, right?? Thx Link to comment Share on other sites More sharing options...
Tobes49 Posted February 2, 2005 Report Share Posted February 2, 2005 MAF sort of take the places of a MAP, Both just read air flow into the engine, You normally dont have both together.(there are some that do). The part your thinking of is just a boost pressure reader. For it to be a MAP(manifold aboslute pressure) it got to read from the manifold after the butterfly. When plumbed in there you get postive and negative reading(force induction) and just negative(N/A cars). MAP sensors are rated in bar pressure rating. so a 1 bar sensor cant read super/turbocharger cars because atmospheric pressure is about 1 bar it can only read below that (ideal for N/A cars that only suck) You need a 2 bar MAP sensor to read force induction cars, a 2 BAR map sensor can read about 1 BAR below and 1BAR above, Upto 15psi if you running more boost you would need a higher rating one! But them reading do depend on the atmospheric pressure of the day! To answer your question, your car doesn't have one. (sorry if the reply a bit long but i'm stuck in a intercafe and it chucking it with rain! ) Link to comment Share on other sites More sharing options...
Drillslinger Posted February 2, 2005 Author Report Share Posted February 2, 2005 Which sensor is it then that's on the IC?? Link to comment Share on other sites More sharing options...
Tobes49 Posted February 2, 2005 Report Share Posted February 2, 2005 Just a boost pressure sensor. Some have tempurature sensors aswell. Link to comment Share on other sites More sharing options...
Mollox Posted February 14, 2005 Report Share Posted February 14, 2005 I think I know what you're talking about - on the S3 its part no 038 906 051 D Well on mine it was at least. It also has a Bosch no of 0 261 230 073 I have one sitting on my desk - my hose leak was misdiagnosed as a faulty one of these so I changed it for no reason. Cost €120 IIRC. Its been sitting here for a year so a bit dusty. If it fits, want me to send it to ya? Ooohh S3 Part! Could be good for 1/2 a horse Symptoms? Unplug it and see! Violently jerky reactions when coming on/off the throttle as I remember. Car ran disgustingly! Some bad pics: Link to comment Share on other sites More sharing options...
Drillslinger Posted February 15, 2005 Author Report Share Posted February 15, 2005 Actually, I checked ETKA and (w/out the D) it appears to be the same part Thanks for the offer, but I've other problems now This morning the TQ decided to start saving error codes APPARENTLY it keeps giving a cylinder 1 faulty coilpack code, BUT, it only does so in 5th (4th twice) gear and only once I get the revs up between 4-5k Mechanic thought the worn/cracked wiring to the coilpacks may be causing it, so he taped them up, but it still came back So tomorrow I'll be taking her back in Gonna post it up in the Tech forum in a minute Thx Link to comment Share on other sites More sharing options...
Paul Posted February 15, 2005 Report Share Posted February 15, 2005 drill swap the coils try that. see if the code moves or stays static Link to comment Share on other sites More sharing options...
Mollox Posted February 15, 2005 Report Share Posted February 15, 2005 Very good thinking. If that doesn't work, take one coil out, put your finger in its place and start the engine. Then tell us if it hurts! Link to comment Share on other sites More sharing options...
Drillslinger Posted February 16, 2005 Author Report Share Posted February 16, 2005 Ha, ha Anyway, it appears to be fixed now, but they had to change the coilpacks AND the plugs I'll post pics later but what they showed me was my 4 plugs, 1 w/insulator cracked and chipped, 2 w/insulator "seperated" just a bit from the electrode, and 1 was OK So what I'M wondering is, can a plug kill a coilpack? I know a coilpack can kill a plug and suspect that the worst plug was in cylinder #1 (Which was giving the error code) but Audi seemed to insunuate that the problem was due to me installing "Aftermarket" plugs But the plugs were Beru Ultra X Platinum plugs FFS and only had 8-9k kms on them Any ideas?? Thx Link to comment Share on other sites More sharing options...
schnorbitz Posted March 12, 2012 Report Share Posted March 12, 2012 dont listen to tobes49 he is talking total crap. MAF and MPA are not the same thing, MAF senses air density change and MPA senses air pressure in the inlet manifold caused by engine load demand .. and you get both together in diesels. **** Link to comment Share on other sites More sharing options...
Tipex Posted March 12, 2012 Report Share Posted March 12, 2012 dont listen to tobes49 he is talking total crap. MAF and MPA are not the same thing, MAF senses air density change and MPA senses air pressure in the inlet manifold caused by engine load demand .. and you get both together in diesels. **** Given the thread is 7 years old, I would imagine it's not an issue! Link to comment Share on other sites More sharing options...
megancheung Posted April 11, 2012 Report Share Posted April 11, 2012 they will miss fire with a bad map sensor on them but you first need to have the computer scanned to see what trouble codes it will give you,other wise you may start buying parts for it that it doesn't really need,if you buy a scanner you will be able to get the codes the same as any one else would be able to and the find out what they mean,that might save you from spending a lot of money on it,good luck. Link to comment Share on other sites More sharing options...
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