Couple codes...first timer
#1
Couple codes...first timer
So, my car has been running very well lately. Once the temp warmed up...occasionally the idle would hunt at first crank ever so slightly (Only I would notice)
I left my car sitting since Friday morning, started it up last night, idle seemed significantly worse, drove to the store (about 1.5 miles way) Got back in the car, fired right up, then idle went really choppy. CEL light came on, slowly drove home.
Pulled out the durametric
P1518
Porsche fault code 404 - DVE control range
P0638
Porsche fault code 402 - DVE fault: position deviation
P1504
Porsche fault code 410 - DVE fault: necessary intake air position
recorded codes, cleared them, then car wont start...just turns over (like a car that ran out of gas would) Disconnect the battery and the car will fire up, but just once.
Side notes: Put the car on a dyno two weeks ago with race tune. I flashed back to street tune on last Friday morning. Really only drove it to work and back since. Tried unplugging MAF to see if it made a difference...not really.
Ideas? Thanks guys!
I left my car sitting since Friday morning, started it up last night, idle seemed significantly worse, drove to the store (about 1.5 miles way) Got back in the car, fired right up, then idle went really choppy. CEL light came on, slowly drove home.
Pulled out the durametric
P1518
Porsche fault code 404 - DVE control range
P0638
Porsche fault code 402 - DVE fault: position deviation
P1504
Porsche fault code 410 - DVE fault: necessary intake air position
recorded codes, cleared them, then car wont start...just turns over (like a car that ran out of gas would) Disconnect the battery and the car will fire up, but just once.
Side notes: Put the car on a dyno two weeks ago with race tune. I flashed back to street tune on last Friday morning. Really only drove it to work and back since. Tried unplugging MAF to see if it made a difference...not really.
Ideas? Thanks guys!
#6
I'm with what's the last thing you did and then also in a connected way how good an idea is it to switch files back and forth on a 10 + year old ecu or does that not ever matter?
Its something to consider..maybe
Nasty sounding codes. Good luck w it....
Its something to consider..maybe
Nasty sounding codes. Good luck w it....
#7
e gas adaptation made it run again...easy enough. p1518 came back, although intermittent...hunting idle. Sort of like light throttle stabs.
I'm leaning towards TB based on diagnosis procedures and watching live data from durametric.
I'm leaning towards TB based on diagnosis procedures and watching live data from durametric.
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#9
I'm going to do a pressure test first...I need to go buy a new hose for my compressor.
That way I can rule it out...it does seem like a vac leak, but watching how through the durametric...you can see where all the sudden the throttle will stab, and show higher voltage. When its running smoothly, the value shows much closer to zero.
I thought MAF too, but the 1518 code according to Porsche diagnosis, points to throttle actuation. And I unplugged the MAF and tried that...no real change when I unplugged it. Assuming it was bad and caused the problem, I would at least think I'd get a higher smooth idle.
Oh and fuel trims are fine too, along with MAF voltage.
Ya, I'll fix it...its funny, this is the first "issue" I've had with the car really. Its been one of the better cars I've owned.
That way I can rule it out...it does seem like a vac leak, but watching how through the durametric...you can see where all the sudden the throttle will stab, and show higher voltage. When its running smoothly, the value shows much closer to zero.
I thought MAF too, but the 1518 code according to Porsche diagnosis, points to throttle actuation. And I unplugged the MAF and tried that...no real change when I unplugged it. Assuming it was bad and caused the problem, I would at least think I'd get a higher smooth idle.
Oh and fuel trims are fine too, along with MAF voltage.
Ya, I'll fix it...its funny, this is the first "issue" I've had with the car really. Its been one of the better cars I've owned.
#12
please go put in a new maf and "if" it solves the issues?, then you don't have to say.. though admittedly those are more ominous codes than a faulty maf might suggest. But If it works? Unplugging it to determine if its working, as it should, is not enough.
You'd be amazed, ( as I am continually ) as to how important the integrity of the few "sensors" this car has are to its overall health and smooth running efficiency..particularly if tuned etc
You'd be amazed, ( as I am continually ) as to how important the integrity of the few "sensors" this car has are to its overall health and smooth running efficiency..particularly if tuned etc
#14
A little update...the 1518 came back but with a 1515 this time (after driving a couple days) The idle felt a lot better though.
I decided the steps I'd take were clean the TB (the 1515 was saying the throttle body wasn't closing fast enough)
Then if that didn't work...replace the TB. Last night I pulled the y pipe and attempted to clean it.
I ended up pulling it off and compared it to the other TB I had...
LOL
I decided the steps I'd take were clean the TB (the 1515 was saying the throttle body wasn't closing fast enough)
Then if that didn't work...replace the TB. Last night I pulled the y pipe and attempted to clean it.
I ended up pulling it off and compared it to the other TB I had...
LOL
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