stupid V6... help plz

[SIG-054]

well where do i start... my car is running like a pig.

-it uses way too much petrol ave. 14L/100km
-Starts really rough like idles at 2/300rpm for a second or so then jumps up and idles at 15/1800rpm and slowly makes its way bak down to 900rpm (it should be lower than that)
- she overheats too but i dont know why...

all these problems arose just overnight about 2months ago

ive changes the leads, plugs, coolant temp sensor, thermostat, fuel filter, dropped the oil, changed coolant, new battery, new gaskets around throttle body and elbow, cleaned air filter (KnN), changed the IAC with a 2nd hand one.. no difference

ive checked the throttle position sensor, fuel reg and i bought a new o2 sensor last yr so it shouldnt be that..

ohh and theres no error codes showin on the ecu

so yeah any help is greatly appreciated

 

[Morton]

Your fuel consumption seems average. and Commodores all have fairly unpredictable idles at startup. They always idle high when cold. If you want it to idle lower, I think you can adjust the throttle cable.

Not sure about the overheating. How bad is it?

 

[1991_Vn2nV]

If thats all city driving that aint so bad. The exec models used 12.5L per 100km so the Calais would be higher than that, and with the big wheels and exhaust i'd be pretty happy with 13.5L city driving especially if you have a lead foot or carry extra people around. 14L really aint that bad at all in a Calais like yours.

If it over heats then check the coolant level underneath the radiator cap, if its full of coolant in the overflow bottle but not under the radiator cap you probably have a blockage in your coolant system.

Also, did you flush the radiator when you replaced the coolant?

 

[SIG-054]

lol i used to get 9.5 L/100km

coolant is fine guys

 

[Morton]

lol i used to get 9.5 L/100km

Me too, before I totalled the mazda and got a V6. :rofl:

 

[SIG-054]

Me too, before I totalled the mazda and got a V6. :rofl:

thats ok mate, but thats how efficient my car was, i was regularly gettin over 600km to a tank (63 L)

 

[FXST01]

Have you checked the tubing and MAP sensor?

 

[SIG-054]

yep all been checked and all working fine

 

[Full Spectrum]

Have you checked the fuel lines for leaks?
I have only just found some of my clamps are getting on and have let out some petrol of late.

But your fuel consumption looks good to a guy that was getting 27l/100 Now 14.5l/100.

 

[STEALTHY™]

dropped the oil, changed coolant

might wanna put some oil back in there maybe......



fuel is way about avergave, my 5L get 10L/100K