Weird Idle problems? (and gas problems)
12-17-2008, 12:06 PM
#1
Weird Idle problems? (and gas problems) Since I've had the car in June, I've faced an identical problem, but only twice. When I start up the car it would idle extremely low, around 400-500rpm and when you press the throttle the rpms would just drop incredibly fast making the car pretty much undrivable. I would shutdown the car, start it up again and the car would operate like normal. It happened to me sometime in august or so and once again around 1-2 weeks ago.
What could be causing this erratic problem?
What I've switched since I've had the car is(anything that MAY be relevant)
1) Plugs/Wires
2) PCV valve
3) Fuel filter
4) Sea foam gas tank/oil
5) One 02 sensor(gonna switch the other one soon)
6) cleaned air filter (K&N)
In addition to this, I don't know if its relevant, but I get INCREDIBLY shitty gas mileage; I average around 150-170 a TANK, which is getting very annoying and expensive at the same time. The car is a '99 transam M6 with 45k. The car seems to run extremely well in all rpms and speeds, IMO atleast. My car has no light being thrown and the "regular" day-of-the-mill cheap scanners do not pull any codes.
I am planning on buying hptuners in the future, but would it be worth buying it sooner than later; would hptuners be able to help in diagnostic purposes?
What could be causing this erratic problem?
What I've switched since I've had the car is(anything that MAY be relevant)
1) Plugs/Wires
2) PCV valve
3) Fuel filter
4) Sea foam gas tank/oil
5) One 02 sensor(gonna switch the other one soon)
6) cleaned air filter (K&N)
In addition to this, I don't know if its relevant, but I get INCREDIBLY shitty gas mileage; I average around 150-170 a TANK, which is getting very annoying and expensive at the same time. The car is a '99 transam M6 with 45k. The car seems to run extremely well in all rpms and speeds, IMO atleast. My car has no light being thrown and the "regular" day-of-the-mill cheap scanners do not pull any codes.
I am planning on buying hptuners in the future, but would it be worth buying it sooner than later; would hptuners be able to help in diagnostic purposes?
Last edited by Aetos; 12-17-2008 at 05:54 PM.
