greetings everyone, seeking advice (car not running right)
Thread Starter
Junior Member
Joined: Mar 2004
Posts: 20
Likes: 1
greetings everyone, seeking advice (car not running right)
hello all, firstly thank you ive gotten alot of great information here from you guys
thank you weistec and thank you rebellion, all the parts ive gotten from both of you are among the best aftermarket parts ive seen, especially after owning an evo x for 5 years
my cla45 hasnt been running right for sometime now and im trying to figure out whats wrong, me and a Mercedes mechanic are both pretty stumped
the car has the following mods
weistec tune/downpipe/anti surge valve
rebellion cat back exhaust/intake/tcu flash
ive definitely elimated the weistec and rebellion parts as the cause
what im getting is an issue under moderate throttle, after 3k rpm under half throttle up to 3800rpm(ish) or so i get a pulsating sound/light feeling
around 3800-4000rpm again under moderate throttle the car loses power and then it comes back, while its doing this for a half second or so you can actually hear it running different sometimes you REALLY feel it, it seems to be better in hot dry air
i threw the following codes 1 time each
p0299 turbocharger/supercharger "a" underboost condition
(i was beating on the car pretty bad when i got this code, the car went into a bit of a limp mode until i restarted it)
the other code i got one time was under normal driving, it was a torque performance code i forget the exact code
car went into limp mode before a restart then ran fine
the anti surge valve isnt on the car right now, its not a vacuum leak, its not the flash, becuase NO one else is having problems with the flash and i sent it back to weistec to verify the flash is fine (thank you weistec for dealing with me)
anyone have any ideas?
thank you weistec and thank you rebellion, all the parts ive gotten from both of you are among the best aftermarket parts ive seen, especially after owning an evo x for 5 years
my cla45 hasnt been running right for sometime now and im trying to figure out whats wrong, me and a Mercedes mechanic are both pretty stumped
the car has the following mods
weistec tune/downpipe/anti surge valve
rebellion cat back exhaust/intake/tcu flash
ive definitely elimated the weistec and rebellion parts as the cause
what im getting is an issue under moderate throttle, after 3k rpm under half throttle up to 3800rpm(ish) or so i get a pulsating sound/light feeling
around 3800-4000rpm again under moderate throttle the car loses power and then it comes back, while its doing this for a half second or so you can actually hear it running different sometimes you REALLY feel it, it seems to be better in hot dry air
i threw the following codes 1 time each
p0299 turbocharger/supercharger "a" underboost condition
(i was beating on the car pretty bad when i got this code, the car went into a bit of a limp mode until i restarted it)
the other code i got one time was under normal driving, it was a torque performance code i forget the exact code
car went into limp mode before a restart then ran fine
the anti surge valve isnt on the car right now, its not a vacuum leak, its not the flash, becuase NO one else is having problems with the flash and i sent it back to weistec to verify the flash is fine (thank you weistec for dealing with me)
anyone have any ideas?
Super Member
Joined: Sep 2012
Posts: 533
Likes: 5
C63 Coupe
hello all, firstly thank you ive gotten alot of great information here from you guys
thank you weistec and thank you rebellion, all the parts ive gotten from both of you are among the best aftermarket parts ive seen, especially after owning an evo x for 5 years
my cla45 hasnt been running right for sometime now and im trying to figure out whats wrong, me and a Mercedes mechanic are both pretty stumped
the car has the following mods
weistec tune/downpipe/anti surge valve
rebellion cat back exhaust/intake/tcu flash
ive definitely elimated the weistec and rebellion parts as the cause
what im getting is an issue under moderate throttle, after 3k rpm under half throttle up to 3800rpm(ish) or so i get a pulsating sound/light feeling
around 3800-4000rpm again under moderate throttle the car loses power and then it comes back, while its doing this for a half second or so you can actually hear it running different sometimes you REALLY feel it, it seems to be better in hot dry air
i threw the following codes 1 time each
p0299 turbocharger/supercharger "a" underboost condition
(i was beating on the car pretty bad when i got this code, the car went into a bit of a limp mode until i restarted it)
the other code i got one time was under normal driving, it was a torque performance code i forget the exact code
car went into limp mode before a restart then ran fine
the anti surge valve isnt on the car right now, its not a vacuum leak, its not the flash, becuase NO one else is having problems with the flash and i sent it back to weistec to verify the flash is fine (thank you weistec for dealing with me)
anyone have any ideas?
thank you weistec and thank you rebellion, all the parts ive gotten from both of you are among the best aftermarket parts ive seen, especially after owning an evo x for 5 years
my cla45 hasnt been running right for sometime now and im trying to figure out whats wrong, me and a Mercedes mechanic are both pretty stumped
the car has the following mods
weistec tune/downpipe/anti surge valve
rebellion cat back exhaust/intake/tcu flash
ive definitely elimated the weistec and rebellion parts as the cause
what im getting is an issue under moderate throttle, after 3k rpm under half throttle up to 3800rpm(ish) or so i get a pulsating sound/light feeling
around 3800-4000rpm again under moderate throttle the car loses power and then it comes back, while its doing this for a half second or so you can actually hear it running different sometimes you REALLY feel it, it seems to be better in hot dry air
i threw the following codes 1 time each
p0299 turbocharger/supercharger "a" underboost condition
(i was beating on the car pretty bad when i got this code, the car went into a bit of a limp mode until i restarted it)
the other code i got one time was under normal driving, it was a torque performance code i forget the exact code
car went into limp mode before a restart then ran fine
the anti surge valve isnt on the car right now, its not a vacuum leak, its not the flash, becuase NO one else is having problems with the flash and i sent it back to weistec to verify the flash is fine (thank you weistec for dealing with me)
anyone have any ideas?
I have not thrown any codes yet but the car has been sitting in the shop as we try to figure out what it can be I even switched to a less aggressive 91 octane flash that did not help. Doing research on the symptoms I came across other platforms that describe the same issues we are experiencing and they are attributing it to compressor surge. This is not the surge that is stopped from the blow off valve on throttle lift this is acceleration compressor surge. It happens to me mostly when in a high gear 4th gear or higher (high load) starting off boost at low rpm and as the boost comes on down low it starts oscillating in sound and power.
