Damo Donating Members 403 Member For: 21y 5d Gender: Male Location: Sydney Posted 15/11/06 02:04 AM Share Posted 15/11/06 02:04 AM (edited) Hey guys,I've been having some problems lately with my N/A's idle. It's a BA MkI, 5-speed manual and often when I pull up at the lights the idle will sit at about 800-950rpm then the car will shudder a little and the idle will drop down to somwhere between 500-700rpm, and sometimes even as low as 250rpm (at which point I'm surprised it doesn't stall).This was very bad last week when I pulled into a car park and was turning from one section to another, clutch out and it stalled - right in the middle of my turn and I lost power steering which wasn't good.The only thing that I've done to the car is CAI + K&N panel but this problem was occuring (not quite on the same level) before that. I spoke with my mechanic who said it'd be best to take it to Ford so they can plug it into their CADCAM machine (or something like that) to find out what was going on. He also said that sometimes if the battery has been disconnected for an extended period of time, it can stuff up the idle.So before I take it anywhere I thought I'd post up here and see if anyone had any ideas?EDIT: When dropping to 250rpm the tacho goes nuts, swinging from 250rpm - 900rpm several times before it levels out.Cheers,Damo. Edited 15/11/06 02:06 AM by Damo Link to comment Share on other sites More sharing options...
Paradoxx Colossal Member Member 5,049 Member For: 20y 2m 30d Gender: Male Location: Perth, WA Posted 15/11/06 02:07 AM Share Posted 15/11/06 02:07 AM 1. - Clean your K&N thoroughly2. - Might need to clean your TB... this is a common cause of poor idle3. - Get ford to check your PCM, might be a throttle position sensor fault. Link to comment Share on other sites More sharing options...
Damo Donating Members 403 Member For: 21y 5d Gender: Male Location: Sydney Posted 15/11/06 02:11 AM Author Share Posted 15/11/06 02:11 AM (edited) Hmmm, yeah I've still been looking around after posting and it looks like a dirty TB can cause it. I'll rib 'er off and have a look. Thanks. K&N is very new but I'll check that out too while I'm at it. Edited 15/11/06 02:16 AM by Damo Link to comment Share on other sites More sharing options...
Paradoxx Colossal Member Member 5,049 Member For: 20y 2m 30d Gender: Male Location: Perth, WA Posted 15/11/06 02:22 AM Share Posted 15/11/06 02:22 AM Sometimes if you dont let the K&N oil soak into the filter for a while it can separate and get caught in the TB, causing it to get a bit sticky. Link to comment Share on other sites More sharing options...
Guest Guests Posted 15/11/06 02:35 AM Share Posted 15/11/06 02:35 AM Hard to explain but here I go,Your local Ford dealer can't help you with this I tried over and over and then gave up.the idle is set to tight from the factory. The top and bottom of the range are to tight, there for when your in N and the motor is ment to return to idle it some times will dip a bit (don't know why) it then hits or passes its set limit and at that point the computer sh*ts its self big time.Then the computer will then say 01110001100110001 (which mean, "F'n'H in BlackOak, lift the idle speed asap') that's when it pushes the idle speed to hard and guess what, it hits the top limit then 01110001100110001. that's when you know your doing the BA Mk1 XR6 N/A idle dance. To fix it the edit's the way to go. Talk to a tuner and get them to open your idle peramitors (spelt wrong I'll bet).My car was bloody lord of the FN dance, till I dropped it into Nizpro. Link to comment Share on other sites More sharing options...
Paradoxx Colossal Member Member 5,049 Member For: 20y 2m 30d Gender: Male Location: Perth, WA Posted 15/11/06 02:38 AM Share Posted 15/11/06 02:38 AM Mine surges at idle irrespective of which tune I am using. It is fixed with a good TB clean. Link to comment Share on other sites More sharing options...
Guest Guests Posted 15/11/06 02:44 AM Share Posted 15/11/06 02:44 AM (edited) TB cleanWhen you go to ford that's all they do on the issue, its a good fix if that's the problem, but if its clean, BA quick step.Nothing worse than the BAstard stalling at the lights and the cars behind you are reading the CV Performance sticker and thinking "that fool can't even drive the thing". Edited 15/11/06 02:44 AM by NOS XR Link to comment Share on other sites More sharing options...
Damo Donating Members 403 Member For: 21y 5d Gender: Male Location: Sydney Posted 15/11/06 04:19 AM Author Share Posted 15/11/06 04:19 AM Hahaha. Thanks for the replies, guys. I'll have a look & let you know how I go. Link to comment Share on other sites More sharing options...
Damo Donating Members 403 Member For: 21y 5d Gender: Male Location: Sydney Posted 16/11/06 02:15 AM Author Share Posted 16/11/06 02:15 AM One more thing guys - I've seen a few debates on what to clean the TB with. Carby cleaner, or... ? Link to comment Share on other sites More sharing options...
ZAP No boost, no bottle, just my foot on the throttle! Lifetime Members 7,935 Member For: 20y 9m 10d Gender: Male Location: Sydney Posted 16/11/06 04:36 AM Share Posted 16/11/06 04:36 AM Nulon carby cleaner (or any brand) is the best Link to comment Share on other sites More sharing options...
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