baf6 Member 139 Member For: 15y 8m 30d Posted 07/05/11 02:26 AM Share Posted 07/05/11 02:26 AM (edited) Hi guys, im having a problem that happens on occasions, when im givin the F6 a bit of stick and back off the engine runs rough and loses power, usually just back of for a bit and it comes good, mostly happens in 4th or 5th gear.whats the most likely cause of this, valve springs, coil packs? any other ideas?I've done a bit of searching and thinking valve springs, if it is the case, what are the best value valve springs, noticed theres quite a range. Brad. Edited 07/05/11 02:27 AM by baf6 Link to comment Share on other sites More sharing options...
Mr_4.0 Member 1,096 Member For: 13y 11m 29d Posted 07/05/11 02:47 AM Share Posted 07/05/11 02:47 AM How long is it rough for? If u try and slowly accel while it's rough, what happens? Link to comment Share on other sites More sharing options...
Panda Eyes flame magnet Gold Donating Members 5,674 Member For: 16y 8m 1d Gender: Male Location: adelaide hills- 'race air' central Posted 07/05/11 05:43 AM Share Posted 07/05/11 05:43 AM valve springs will do that on hi revs. a sedan with no surge tank will do that if fuel level is under 1/2 tank. old plugs will do that under load. Link to comment Share on other sites More sharing options...
baf6 Member 139 Member For: 15y 8m 30d Posted 07/05/11 07:45 AM Author Share Posted 07/05/11 07:45 AM its rough untill I back right off and slow down, if I accell slowly it runs rough like it's not running on all cylinders.Its a ute but I do get fuel surge under 1/4 tank, plugs were replaced recently by tuner Link to comment Share on other sites More sharing options...
Kroozin Menace Donating Members 1,990 Member For: 13y 8m 27d Gender: Male Location: Sydney Posted 09/05/11 12:04 PM Share Posted 09/05/11 12:04 PM mine does the same.. I'm led to believe it is the valve springs and they need to be replaced with aftermarket springs I think some guys are using crow cams springs,etc..$$$ . What is the worst case scenario if encountering valve float here and there after a big rev like baf6 has said? Link to comment Share on other sites More sharing options...
baf6 Member 139 Member For: 15y 8m 30d Posted 10/05/11 08:45 AM Author Share Posted 10/05/11 08:45 AM (edited) rapid have springs for $279, think I'll get them and see how I goretune too, might see the power I should be, with a lil luck Edited 10/05/11 08:58 AM by baf6 Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 7m 21d Gender: Male Location: @ my laptop Posted 10/05/11 09:25 AM Share Posted 10/05/11 09:25 AM . What is the worst case scenario if encountering valve float here and there after a big rev like baf6 has said?dropping a valve into the cylinder and smashing the piston, block and cylinder head Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now