Help, car still down on power...
07-18-2015, 12:23 AM
#16
Nordschleife Master
Yes, it's been to P3 and I have no complaints or doubts that there's no longer a boost leak, but it's still down on power by about 1.5 sec in the quarter mile, and rpms still fluctuate +/- 300 until the engine is warm. I feel bad that I've brought it in 3 times for this issue and don't want to be that PITA customer. If you just drove the car you'd never know, but I keep such good records with my timeslips that I can definitely tell when it's not running 100%. The reason I mention taking it to Wright Motorsport is because they installed the tune and I've been talking with the folks at GIAC and am wondering if it was a software thing. My durametric arrives today, hopefully with the pentalobe socket so I can see if the MAF is the cause. If not, I give up.
07-19-2015, 12:56 PM
#19
Is there an easy way to check this? I have durametric data and it appears like boost is definitely down, although I admit I'm not exactly sure what all the numbers are/should be telling me. Reading posts furiously trying to get spun up.
07-19-2015, 03:53 PM
#20
CEL functionality is not disabled, although I do have the cel from the rear O2 censors disabled.
I haven't had a compression test done and hope it's not anything related to that. I really think it's a sensor/programming issue because the car will make tons of full power, just not consistently, especially during launch. From 1/8 to 1/4 mile, it's pulling the same as always gaining approx. 26 mph, but that first 1/8th is slow, on launch, at 60', 1000', etc.
I haven't had a compression test done and hope it's not anything related to that. I really think it's a sensor/programming issue because the car will make tons of full power, just not consistently, especially during launch. From 1/8 to 1/4 mile, it's pulling the same as always gaining approx. 26 mph, but that first 1/8th is slow, on launch, at 60', 1000', etc.
07-20-2015, 07:59 AM
#22
Rennlist Member
Help, car still down on power...
Thanks for sharing the document, I'm sure helpful to many
07-20-2015, 09:17 AM
#23
Drifting
OP, that sucks and is weird, keep us in the loop if you find out what it is. Since you basically checked everything I'm a bit at a loss here. Good luck.
07-20-2015, 11:14 AM
#25
Thanks for posting, this sounds exactly like what my car is doing, and my VIN falls within the range of this issue. I'll keep this thread updated on what I find. Cheers!
07-21-2015, 02:24 AM
#28
Remember to check the y-pipe connection near the throttle body also.
I recently had an aftermarket "worm clamp" clamping the Y pipe to the intake come loose during my last track event. Boxsters were flying past me while I was at 100% throttle. My car was also running rough at idle. I can only say that the car ran rough at idle while the engine was hot, I found the issue within 10 mins. reclamped the pipe and, idle was perfect.
Do you have any logs since you have durametric?
I recently had an aftermarket "worm clamp" clamping the Y pipe to the intake come loose during my last track event. Boxsters were flying past me while I was at 100% throttle. My car was also running rough at idle. I can only say that the car ran rough at idle while the engine was hot, I found the issue within 10 mins. reclamped the pipe and, idle was perfect.
Do you have any logs since you have durametric?
07-21-2015, 04:12 AM
#29
Burning Brakes
Help, car still down on power...
Originally Posted by elite1
Do you have any logs since you have durametric?
