Romunski Member 45 Member For: 10y 7m 23d Gender: Male Location: Melbourne Posted 24/05/18 12:22 PM Share Posted 24/05/18 12:22 PM Hey guys tried searching on the forum but no luck.. I'm not sure if it's a common problem but my wife has a standard fg xr6 2011 with about 205xxx on it.. Zf6. No mods whatsoever Now for some reason when it's in park or neutral it idles at around 800-850rpm but in drive it idles between 500-550rpm and also I've realised More so when the engine sits overnight and if it's a really cold night.. When we start the car the engine will fire no problem but the revs will fluctuate for 2 or 4 seconds between say 600ish to 1000rpm.. Doesn't happen all the time, maybe once every week and a half The box hasn't been serviced but is on the books and I'm planning on cleaning out the throttle body out this weekend when I have some time. Spark plugs were changed and battery has been changed recently too, Is there anything else that could possibly be causing this issue Thanks in advance Link to comment Share on other sites More sharing options...
FiftyOne Bronze Donating Members 1,145 Member For: 11y 5m 12d Gender: Male Posted 24/05/18 12:32 PM Share Posted 24/05/18 12:32 PM Just after the car has been started it fluctuates? Link to comment Share on other sites More sharing options...
Romunski Member 45 Member For: 10y 7m 23d Gender: Male Location: Melbourne Posted 24/05/18 12:38 PM Author Share Posted 24/05/18 12:38 PM Yeah pretty much as soon as I start it.. After it Fluctuates for a few seconds and then it'll rev a little higher as all cars do when they're cold and once it's warms up a little it'll drop to 550rpm Link to comment Share on other sites More sharing options...
Rab WOT? Moderating Team 10,981 Member For: 11y 9m 18d Gender: Male Location: Frankston, 3199 Posted 24/05/18 01:15 PM Share Posted 24/05/18 01:15 PM Is it stalling or feel like stalling? How long since a service? Clean out the intake plastic and check for leaks? (that's about the limit of my skills) Link to comment Share on other sites More sharing options...
Romunski Member 45 Member For: 10y 7m 23d Gender: Male Location: Melbourne Posted 24/05/18 01:21 PM Author Share Posted 24/05/18 01:21 PM No it's not stalling or atleast it doesn't feel like it's stalling as it doesn't drop that low when the cars at operating temp and just idling in gear. 500rpm is usually the lowest Service Intervals are every 10k and I have about 3k or 4k to go but this issue has been ongoing for a while and I just couldn't find an answer on google for my exact problem Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,033 Member For: 16y 8m 3d Gender: Male Location: Melbourne Posted 24/05/18 01:25 PM Share Posted 24/05/18 01:25 PM clean the throttle body and intake tract. Check the spark plugs and coils for signs of corrosion. Otherwise it seems almost normal. 1 Link to comment Share on other sites More sharing options...
Romunski Member 45 Member For: 10y 7m 23d Gender: Male Location: Melbourne Posted 25/05/18 02:56 AM Author Share Posted 25/05/18 02:56 AM Any Products you would recommend or just use a rag and get in there? Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,033 Member For: 16y 8m 3d Gender: Male Location: Melbourne Posted 25/05/18 03:19 AM Share Posted 25/05/18 03:19 AM just carby cleaner does a good job on the intake tract, plus a clean wipe of the surfaces afterwards with either a rag or paper towel. Link to comment Share on other sites More sharing options...
masda74 To Loud Gold Donating Members 4,112 Member For: 13y 13d Gender: Male Location: WA, Perth Posted 28/05/18 01:52 AM Share Posted 28/05/18 01:52 AM What about the battery. how old is it? Link to comment Share on other sites More sharing options...
Romunski Member 45 Member For: 10y 7m 23d Gender: Male Location: Melbourne Posted 28/05/18 02:48 AM Author Share Posted 28/05/18 02:48 AM The battery I just changed like 2 weeks ago cos it was finished. Changed it to a delkor hi performance or something along the lines of that and it's a 680cca Also can anybody confirm if I can change the thermostat without having to flush the cooling system or burping the air out? As I need to change that too.. Cos you know.. Wife's car and she never maintains sh*t 1 Link to comment Share on other sites More sharing options...
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