Humungus fuel usage

[VEdriver59]

I'm going to change the plugs on my ve because its done 135k without the plugs ever having being changed, to the best of my knowledge anyway.

As this car goes through humungas amounts of fuel I am wondering wat the problem could be if changing the plugs does not fix the problem.

One thing I've noticed for a while is that it seems to idle fairly fast, eg, I have to keep my foot on the brake as I go into the garage so as to stop it from hitting the wall. Once upon a time it would roll into the garage and only a slight touch of the brake would be enough to stop it without any jerk.

What causes it to idle too fast and would that explain the amount of fuel it slurps up?

If changing the plugs and reducing the idle speed does not stop the excessive ful use what else should I look at?

There is no smell of petrol anywhere so I cant see that there is a leak in the system but there must be something causing it.

If petrol was alcohol, my car's engine would get locked up for 2 years.

thanks

 

[Immortality]

Has the engine been serviced in that time?

Start with all the basic service items and see how it goes. Definitely do the plugs first.

 

[losh1971]

What mileage are you getting?

 

[redvxr8clubby]

What mileage are you getting?

and average speed also

 

[whats up]

May not help U much but worth a try
Start engine and let it idle for about 3 mins just on it's own.
Might just be a relearn.

 

[cruelass]

My 07 SS recently developed a problem with the temp sensor. For about 6 months it would only show 1/8 on the temp gauge. Car felt sluggish and chewed heaps of juice. I thought the thermostat may be stuck and only when it completely failed and threw up a service light did i scan it and found the coolant temp sensor had **** itself. I changed that and fuel usage improved and the car runs way better. Does your car get up to temp? maybe stuck in the warmup loop or something

 

[VTS5]

Check the air cleaner element, give your Maf sensor a good bath and with the new plugs you might be happy.... again

 

[RiCeY]

New plugs won't fix it. Possibly a vacuum leak causing it to run lean and idle high. Check for any vac leaks.

Need a scan tool to check fuel trims and O2 sensor activity.

 

[lout]

going with coolant sensor as first choice
or vac leak as already mentioned
plugs could cause it ,but would expect a misfire code