TonyP Posted November 5, 2009 Share Posted November 5, 2009 I've got an n/a automatic. It's been running perfectly for ages but since the cold/damp mornings have come along has developed an odd problem. It starts up first time idling at about 1300 which is normal (when warmed up this drops to about 700). The problem occurs when I try to pull away. I'll move a few yards and then the revs suddenly drop to way below 1000. I let off the accelerator revs go back up. Try to gently accelerate again and the same thing happens. After that, the car pulls away absolutely fine and I don't have any problem for the rest of the day. Any idea what might be causing this. Thanks Tony Quote Link to comment Share on other sites More sharing options...
stevie_b Posted November 5, 2009 Share Posted November 5, 2009 1300 cold idle in an NA sounds a bit low. I'd expect around 2000rpm. It might not be linked to your problem, but just a thought... Quote Link to comment Share on other sites More sharing options...
TonyP Posted November 5, 2009 Author Share Posted November 5, 2009 1300 cold idle in an NA sounds a bit low. I'd expect around 2000rpm. It might not be linked to your problem, but just a thought... Maybe. It could be a bit higher than 1300 but it's never been 2000 and I've had it nearly three years now. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 5, 2009 Share Posted November 5, 2009 N/A's usualy idle around the 1700 mark. Well all the 1s ive been in have done anyway Quote Link to comment Share on other sites More sharing options...
TonyP Posted November 5, 2009 Author Share Posted November 5, 2009 N/A's usualy idle around the 1700 mark. Well all the 1s ive been in have done anyway Maybe I've got that wrong. I'll check later. Quote Link to comment Share on other sites More sharing options...
martini Posted November 5, 2009 Share Posted November 5, 2009 MY NA idles at 800 when it's warm and has done for years according to MOTs etc. When it's cold it's up at 1500+ and nearer 2000 when i turn the lights and heaters on at first. Quote Link to comment Share on other sites More sharing options...
jim Posted November 5, 2009 Share Posted November 5, 2009 Idle speed will be different depending on whether it's in park or drive (with the brake on) too, and as Martin says if you've got the blower on it'll be different again. Sorry Tony, don't know the answer to your question...maybe a sticking throttle cable? Quote Link to comment Share on other sites More sharing options...
marc_p Posted November 5, 2009 Share Posted November 5, 2009 Could be your battery on it's way out, do all the lights dim down when the rev's drop? Quote Link to comment Share on other sites More sharing options...
TonyP Posted November 6, 2009 Author Share Posted November 6, 2009 Ok. Checked and cold idle is around 1500. After the problem yesterday morning the car stood outside all day until 8pm, started and drove off no problem. This morning it did it again. Quote Link to comment Share on other sites More sharing options...
Guest jdwals Posted November 6, 2009 Share Posted November 6, 2009 My N/A manual, in the three weeks I have had her anyway, idles at 2,000rpm when switched on first in the cold mornings - drops down to around 700rpm or so when warmed up. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted November 6, 2009 Share Posted November 6, 2009 Tony, have you had it serviced recently? Is the air filter in good condition? Quote Link to comment Share on other sites More sharing options...
TonyP Posted November 6, 2009 Author Share Posted November 6, 2009 Tony, have you had it serviced recently? Is the air filter in good condition? No I haven't. Probably a good idea with the cold weather on the way. Quote Link to comment Share on other sites More sharing options...
edge Posted November 6, 2009 Share Posted November 6, 2009 Tony, have you had it serviced recently? Is the air filter in good condition? Check ht leads, rotor arm and cap, plugs, air filter etc and reset ecu. Maybe do a search on n/a cold start valves or whatever they use. Quote Link to comment Share on other sites More sharing options...
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