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right i have been convinced for a while now that the ro is running a tad too rich but havent had the chance to give it a decent run. filled up and reset trip computer. straight on to the motorway for a non stop 86mile trip to alton towers. steady 70 ish plus or minus 10 or 20 ish. then once on the a roads driving like a judge cruising in 6th at the earliest opportunity (boring driving). fuel computer made 24.7mpg for the all round trip. now to me that seems a bit low considering i didnt have any fun. Have replaced lambda sensors recently thinking this maybe the issue but no difference noticed, any ideas.
Don't know if you can do it on the later monaro's but you can get it to redo the fuel. I know this atleast works on VT/VX models.
Get the car up to full operating temperature. (very important)
There is a fuse for the ECU in the engine bay.
Turn key on, so that the lights on the dash light up
Turn off airconditioning.
Pull the fuse out (think it is a 10A fuse but could be wrong)
Poke your head inside the cab
Wait until you hear a chime
Turn the key to the off position
Put the fuse back in
Start the car up and let it idle for around 5-10 minutes.
You should hear the engine changing sounds, ie running lean, then a bit better.
If the engine stops, just restart it.
Should then get everything running as it should be.
Get the car up to full operating temperature. (very important)
There is a fuse for the ECU in the engine bay.
Turn key on, so that the lights on the dash light up
Turn off airconditioning.
Pull the fuse out (think it is a 10A fuse but could be wrong)
Poke your head inside the cab
Wait until you hear a chime
Turn the key to the off position
Put the fuse back in
Start the car up and let it idle for around 5-10 minutes.
You should hear the engine changing sounds, ie running lean, then a bit better.
If the engine stops, just restart it.
Should then get everything running as it should be.
mobile01 said:
right i have been convinced for a while now that the ro is running a tad too rich but havent had the chance to give it a decent run. filled up and reset trip computer. straight on to the motorway for a non stop 86mile trip to alton towers. steady 70 ish plus or minus 10 or 20 ish. then once on the a roads driving like a judge cruising in 6th at the earliest opportunity (boring driving). fuel computer made 24.7mpg for the all round trip. now to me that seems a bit low considering i didnt have any fun. Have replaced lambda sensors recently thinking this maybe the issue but no difference noticed, any ideas.
Lamda sensors don't last forever. However, if the motor is running rich, it is because the ECM (cars computer) is telling the injectors to add fuel, possibly as a result of seeing a lean situation.The advice given before cancels out the fuel trim information which the ECM uses (amongst a load of other things) to determine the amount of fuel, obviously. This means it starts fueling the car with a clean sheet. As time goes on it will eventually account for whatever situation you have and you could end up being rich again. Being able to log events with the right equipment helps.
One example of going rich could be if you had a leak in the exhaust manifold. The O2 sensors would read this extra o2 in the exhaust as a lean mixture and compensate accordingly.
Hopefully someone else with more knowledge than me, can help out here with some other ideas.
My vxr8 averages 24.3mpg that includes my multiple foray's to the drag strips.
I do however do quite a few motorway miles, but thats an overall mix including getting to and from everywhere via inner london.
Thats with a mafless tune and some fuel taken out at WOT plus adjustments to power enrichment triggers so it doesnt dump a rich mixture in for zero reason at all, which its wont to do in the stock configuration.
I do however do quite a few motorway miles, but thats an overall mix including getting to and from everywhere via inner london.
Thats with a mafless tune and some fuel taken out at WOT plus adjustments to power enrichment triggers so it doesnt dump a rich mixture in for zero reason at all, which its wont to do in the stock configuration.
On my 12 mile each way daily commute which includes probably 20% heavy traffic and the rest clear national limit roads I get just over 20mpg.
My best was 29.7mpg on a 300 mile motorway trip. On long trips I normally get over 26 or 27mpg, I'd consider anything less to be quite poor. This all includes having some fun too.
On a hoon I might see 18/19mpg average. Hooning aside, I've not averaged < 20mpg over a whole tank since I got the car a year ago (6L VXR btw).
Edit: No FI over here sadly.
My best was 29.7mpg on a 300 mile motorway trip. On long trips I normally get over 26 or 27mpg, I'd consider anything less to be quite poor. This all includes having some fun too.
On a hoon I might see 18/19mpg average. Hooning aside, I've not averaged < 20mpg over a whole tank since I got the car a year ago (6L VXR btw).
Edit: No FI over here sadly.
Edited by kjmac on Saturday 25th October 13:34
enconomical is sooooooooooooo boringI did an extreme test - 100 miles of mainly motorway to see what i could get - drove at 56 mph all the way and just topped 30 mpg. never ever seen it since and tbh don't want to!
average is usually 22 ish with mixed driving and long motorway runs with occasional blasts.
I drove the Monkfish demo (LS2) and could easily get 26 mpg even with listening to the exhaust howling with the window open.
Apparently the equation is simple. Increase your LS number and your fuel economy follows
average is usually 22 ish with mixed driving and long motorway runs with occasional blasts.
I drove the Monkfish demo (LS2) and could easily get 26 mpg even with listening to the exhaust howling with the window open.
Apparently the equation is simple. Increase your LS number and your fuel economy follows
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