Spluttering noise from exhaust

[Damo]

I have a spluttering noise coming from my exhaust, sounds like its blowing bubbles. Its only happening when revs are dropping back to idle though, and i am in neutral. So If i rev it up a bit over 2000rpm and let the throttle go then u can hear it. I cannot notice it while driving.

Last week I did an oil and oil filter change, fuel filter change and spark plug change. All was fine till last night when i first noticed the noise. I cant imagine this having anything to do with the problem.

Can anyone give me some help as to what it might be? Not sure if its drinking more fuel yet as i have not driven far enough to notice but it almost sounds like there is liquid in the exhaust.

BTW. There has been no rain and i have not washed the car.

Damo

[myr332]

I have a spluttering noise coming from my exhaust, sounds like its blowing bubbles.  Its only happening when revs are dropping back to idle though, and i am in neutral.  So If i rev it up a bit over 2000rpm and let the throttle go then u can hear it.  I cannot notice it while driving.

Last week I did an oil and oil filter change, fuel filter change and spark plug change.  All was fine till last night when i first noticed the noise.  I cant imagine this having anything to do with the problem.

Can anyone give me some help as to what it might be?  Not sure if its drinking more fuel yet as i have not driven far enough to notice but it almost sounds like there is liquid in the exhaust.  

BTW. There has been no rain and i have not washed the car.

Damo

I used to have this problem with an older car in the days of the good ol' Carby's.. Turned out that it was running quite rich, which created the gurgling and occasional backfiring.

have you installed a after market computer recently? what type of fuel are you using? have you made any modifications to your car recently besides the standard maintenance stuff?

[Damo]

No recent mods, the fuel is bp ultimate and ECU is stock. I might try resetting the ECU today and giving the AFM a clean.

[JAPCAB]

Cleaning AFM with carby cleaner is a really good idea, i did it yesterday and the car runs a lot better and smoother now, plus a bit of a hunting problem that my car used to get after a good thrashing has gone away so give it a go......

No recent mods, the fuel is bp ultimate and ECU is stock.  I might try resetting the ECU today and giving the AFM a clean.

[Damo]

I did the above, the car is running smoother but still gargling. going to try a ecu diagnostic check on the o2 sensor and might as well check everything else at the same time.