2004 A4 1.8T Lacking power and smoking.
06-26-2010, 04:49 PM
#1
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2004 A4 1.8T Lacking power and smoking.
I've had this audi for a few months now and ever since the CEL came on it lacks power. There was a cracked crankcase breather hose and the bleeder valve was broken inside. Since replacing those parts the rough Idle went away but the poor car lacks power. It's supposed to be 170 hp but it seems to have half of the power it had before the CEL came on. There is some kind of leak that causes smoke to come out from the pass side front weel well when I come to a stop after driving for a while. Please help!
06-26-2010, 04:59 PM
#2
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Re: 2004 A4 1.8T Lacking power and smoking.
is it your turbo thats smoking? check if thats the location. Could be a nearly blown turbo sounds like the symptom of that. does it drive straight or does it go to one side more or less?
06-26-2010, 06:26 PM
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Re: 2004 A4 1.8T Lacking power and smoking.
hmmm... did you scan it and get any codes, cel would defiantly throw some codes at you and tell you exactly where to look.? smoke coming out is defiantly a bad sign. do your brakes work fine? i highly doubt it but the brakes could be rubbing and not functioning properly. Check and see if they are almost equal temperature, both front left and right rodder. Depending on how your drive it may become obvious quickly if thats the issue. that would be my second guess. Check that, it would explain low power and smoke.
Last edited by GeneKam; 06-26-2010 at 06:30 PM.
06-26-2010, 06:37 PM
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Re: 2004 A4 1.8T Lacking power and smoking.
I am just leaving house right now and it hit me, what colour is the smoke? if its whiteish its most likely from water based fluids. Blue tinted smoke is from oil based substances, if so check to see if your oil level decreased sense last time, and black should be from petrol. So that can actually help you narrow down the cause. If its brakes the rims also might be hot and have a distinct burning smell. and as a rule CEL should be checked as soon as you get it, it should throw codes at your faster then... i cant think of anything clever right now.
06-27-2010, 01:36 AM
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Re: 2004 A4 1.8T Lacking power and smoking.
Only code I could get was Knock sensor. Is this the one that is located at the front of the engine under the timing belt cover? Looking around the internet, the problem could be an engine speed sensor...any comments on these suspects ?
06-27-2010, 02:36 AM
#7
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Re: 2004 A4 1.8T Lacking power and smoking.
well assuming you did your timing belt around 120 clicks that shouldnt be the issue. also assuming you use 91 or better on the car and so did the last owner that shouldnt be an issiu. if so could he prove that timing belt and water pump were done? receipt?
/drunk post
beyond this i have no more ideas about this
/drunk post
beyond this i have no more ideas about this
07-02-2010, 01:38 AM
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Re: 2004 A4 1.8T Lacking power and smoking.
Timing belt was done, I can assure that. Is it possible the N75 valve may be faulty causing oil to spurt out and burn on the turbo or exhaust? Diverter valve?
07-02-2010, 03:36 AM
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Re: 2004 A4 1.8T Lacking power and smoking.
Neither the N75, nor the diverter valve will cause oil to spurt anywhere.
First thing to do is post the codes you're getting. What was the knock sensor code? The engine was knocking, or the sensor is faulty? Secondly, find out exactly where the smoke is coming from.
It's likely that you have leaking hoses in the PCV and/or vacuum and/or EGR systems. VAG uses all sorts of shitty hard plastics that fail after even just a couple of years. If your codes don't provide any clues, and you're unable to track the source of the smoke, I suggest pressure testing the charge-air lines, vacuum testing the vacuum system, and a thorough inspection of the PVC and EGR systems.
First thing to do is post the codes you're getting. What was the knock sensor code? The engine was knocking, or the sensor is faulty? Secondly, find out exactly where the smoke is coming from.
It's likely that you have leaking hoses in the PCV and/or vacuum and/or EGR systems. VAG uses all sorts of shitty hard plastics that fail after even just a couple of years. If your codes don't provide any clues, and you're unable to track the source of the smoke, I suggest pressure testing the charge-air lines, vacuum testing the vacuum system, and a thorough inspection of the PVC and EGR systems.
