Longun 1 Posted August 21, 2008 Ok I’ve tried a search but not found anything. My issue is when lifting off the throttle there is a delay before it starts to gear brake. The best way of explaining it is, when I lift the car acts like the throttle is still slightly open, its not accelerating its just not slowing down, then a few seconds later you feel it close and start to slow down. This is most noticeable when going down hills and wanting to gear brake. It could also explain why I'm getting terrible MPG (just under 20mpg). So far I've replaced the Engine temp sensor, AFM, whole throttle body (new one has no play and springs closed instantly when released), Throttle position switch (click can be heard when throttle is opened/closed). I've checked for air leaks everywhere and can't find any. Car idles fine however if revved it sometimes takes a bit longer than normal for it to drop back down to 800/900 MI is running its original managment. I'm not sure what to change next, help please? Thanks Share this post Link to post Share on other sites
nick 3 Posted August 21, 2008 It sounds like it's running rich at tickover, try adjusting the idle mixture (screw on AFM) Nick Share this post Link to post Share on other sites
Longun 1 Posted August 21, 2008 (edited) It sounds like it's running rich at tickover, try adjusting the idle mixture (screw on AFM) Nick Stupid question number 1, do I go in or out? Thanks Nick Edited August 21, 2008 by Longun Share this post Link to post Share on other sites
KRISKARRERA 2 1 Cars Posted August 21, 2008 Out i.e anti clockwise. Share this post Link to post Share on other sites
Longun 1 Posted August 21, 2008 Thanks Kris. I'll give this a try later an report back Share this post Link to post Share on other sites
KRISKARRERA 2 1 Cars Posted August 21, 2008 Might try it on mine too. I'd screwed mine in a bit years ago because I'd found that when the engine gets hot it idles so rough when lean. Share this post Link to post Share on other sites
Ethos 0 Posted August 22, 2008 Hmm, sure it's OUT to make it leaner? I just had a play with mine, screwed it out 2 times left for a minute.. not difference then 1 more time... not difference! Tried screwing it in too. Back to normal now, ended up with a bit of unburnt fuel down the exhaust. Good thing I don't have a cat Share this post Link to post Share on other sites
Ethos 0 Posted August 24, 2008 Had a bit more of a play with this today, "in" 4 times stops it running so rough (exhaust nearly completely stops popping). This was when the car was v.warm ie fan was cutting in. How will this effect cold idle? Share this post Link to post Share on other sites
KRISKARRERA 2 1 Cars Posted August 24, 2008 Oh yeah you have to wind it in/out loads, of course it's a bit of a bodge really because it sahould be done with an exhaust gas analyser. Share this post Link to post Share on other sites
