Question about 2008 Pontiac G6 Sedan

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Pontiac g6wont start

I put on a used low mileage computer now my car won't even turn over help

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The computer for your car has a specific program for that car. You need to have the second computer flashed with your program, mileage and VIN number. It is extremely rare that a computer from another car, even the exact car, will work without the program being flashed.

Posted on Mar 22, 2014

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Will not start

Hey Sidney. On G6 it has a pass lock anti theft- in which your key is programmed into the computer. If the key is not programmed into the computer or ECM, then nothing at all, heres the steps, and where it says a new cut key on 1, ignore that, just use your key, and also you will need to take your g6 into the dealership and have them reflash the ECM, and program the VIN number into your new ECM, if not it might throw the check engine light.

1. Insert a new cut key in ignition and turn key to the ON position for
10 minutes and 30 seconds.

2. Within 45 seconds turn the key to OFF and then back to the ON position for
10 minutes and 30 seconds. 3. Within 45 seconds turn the key to OFF and then back to the ON position for
10 minutes and 30 seconds.

4. Turn key OFF then back ON. The key is now programmed.
Start vehicle to test key.

Mar 22, 2014 | 2008 Pontiac G6 Sedan

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Put on good used low milage computer now wont start

check if have the same numbers en the tag because sometimes it's different code if is the same the computer is not good

Mar 22, 2014 | 2008 Pontiac G6 Sedan

1 Answer

Oil type for my 2002 firebird

You can use 5w30 - 5w20 - or 10w30 depending on the air temp and your mileage.
Low mileage engines can use the lower weight. Hot weather or high mileage engines can use the higher weight.

Aug 27, 2013 | 2002 Pontiac Firebird

1 Answer

So I changed the oil in my friend car and she has really high mileage on it so I put 10W-30 in it for high mileage an now it won't start can you help me out please

I would suggest a full synthetic oil, next time & stay with 5W-30
That will be better on start up

I have no idea why it won't start after only changing the oil

I think that was just a coincidence

I just installed a new throttle body ,because the motor has
acted up for 7 months & unknown the battery was failing
as I was diagnosing some odd behaveour

I was using professional scan tool software & when that
went weird I saw the computer module & battery voltages
going down,key on,engine off. So strange things happen
with todays electronics. When your think your on your game
things go to the twylight zone

May 23, 2012 | 1997 Chevrolet Lumina

1 Answer

I have Jaguar 2000 S type V6 engine 3 litre. I need to know valve clearances and how to adjust. This is the last avenue to take in relation to a sputtering engine miss at idle. I have replaced the...

Low mileage on the Jag to be having this problem. Usually the misfire on these engines is a weak coil, and they won't set a code. The 3.0 is derived from a Ford design and it uses direct-acting mechanical bucket tappets (DAMB) for the engine they put in the S type from 2000-05.
The adjustments are done with shims. I don't have access to the mfrs. specs on this computer..It is at my shop... If the tappets are not overly noisy you should not need an adjustment, or an adjustment that would keep the valves from sealing and opening.
I suggest running a compression test and a cylinder bleed down test on the wet cylinder. This information will be helpful in further troubleshooting and would eliminate a couple of possibilites.

I hope this helps & good luck with the Jag.

Aug 30, 2011 | Jaguar S-Type Cars & Trucks

2 Answers


the fuel pump will not cause bad gas mileage.the spark plugs may need changing,fuel filter,air filter,plug wires(basically a tune-up),or the thermostat probably needs changing as this can cause poor gas mileage as it won`t allow the motor to get to proper operating temperature(computer monitors temp)and commands fuel injectors on longer(spray more fuel).driving habits change over time look at this also.cold whether driving also will use more fuel.pcv valve i can`t help you,maybe a parts store will show were it is if it has one.the only time you change the fuel pump is when it gets noisy or it quits altogether,or the pressure is good but the fuel volume is not to specs.

Apr 10, 2011 | 2003 Kia Sorento

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Gas mileage is terrible,check engine light on,put on computer by friend said o2 sensor -i wasnt sure my friend new what he was doing so took to auto zone now they say the computer wont read

auto zone reader will sometimes not read codes. take it to your local garage and ask them to plug into it with an updated reader. i dont charge to read a code and i would hope they dont either. the o2 sensor could cause bad gas mileage. whens the last tune up done? check air filter. plugs? also check air in tires. low tires can cost fuel mileage as well. hope this helps

Mar 26, 2011 | 2005 Chevrolet Silverado 2500HD 2WD

1 Answer

Lost gas milage

There are literally dozens of potential causes for a decrease in fuel economy - many of them will also cause other symptoms with the way the vehicle operates, which can be helpful in diagnosing the problem. Some of the more common ones are:

* Fuel/Intake System Restrictions - Dirty air filters, fuel filters, and fuel injectors make your engine work harder to generate the same amount of power at the wheels, thus wasting more of its own energy and reducing mileage. This is probably the most common cause of gradual fuel economy loss because, unless the problem is severe, computer controls can usually compensate such that the average driver doesn't notice any issues. This is why it's important to stick to maintenance schedules, even if it seems unnecessary at the time.

* Engine Management Problems - Modern vehicles rely heavily on computer controls to "fine-tune" the engine in real time for maximum efficiency; an assortment of sensors monitor various engine parameters and feed data to the computer that allow it to make adjustments as conditions warrant. Most of these sensors are subjected to some "hostility" during operation (high temperatures, corrosive gases, contaminants, mechanical wear, etc) and do occasionally fail, preventing the computer from correctly doing its job and consequently reducing efficiency. Similarly, the computer in turn uses some electronic and electromechanical devices to actually control the engine, which can suffer the same fate. Problems of this type will almost always turn the Check Engine light on and cause additional driveability issues (rough idle, poor acceleration, stalling, etc).

* Wheel-End Problems - Low tire pressure is another common cause of low fuel mileage. Low pressure allows a greater portion of the tire tread to contact the road, increasing friction and sapping power (it also causes accelerated and abnormal tire wear). Wheel alignment problems cause similar issues by forcing tires to "drag" across the pavement to some degree, rather than roll smoothly. Less commonly, malfunctioning braking or all-wheel drive systems can cause additional drag at one or more wheels, wasting power.

* Environmental Issues - The environment and manner in which a vehicle is operated can have a big impact on its fuel economy that you might not consider unless you stop to think about it. Your mileage may decrease in snow, for example, because you spend more time in stop-and go conditions and in low gear, or in the summer months if you drive more aggressively. Changes in overall driving habits (going from mostly highway to lots of city driving) can also play a big role.

* "Parasitic" Problems - The engine is ultimately the source of all power used by every system in the vehicle, and as such, any part of the vehicle operating in an inefficient manner has the potential to reduce fuel economy. Clutch/transmission slippage, for example, can cause a dramatic loss in fuel economy, as can regenerative braking malfunctions in hybrid vehicles. Engine accessory problems (water pumps, alternators, etc) can put fuel-wasting drag on the engine, as can internal mechanical problems of the engine itself (these types of problems usually make themselves apparent in other ways - a bad alternator will cause electrical problems or make noise, for example). Even body damage or modifications can increase wind drag, decreasing fuel economy.

One last thing to keep in mind: it is entirely possible for several causes to simultaneously contribute slight effects which all add together to cause a more pronounced problem; hence, it isn't always possible to pinpoint a single "silver bullet" that will cure poor fuel economy, especially in higher-mileage vehicles.

Feb 20, 2011 | 1993 Geo Storm

1 Answer

Have load noise on lift side of engine, changed out top and lower idler and even tensioner, still nothing.. any advice??

its more than likely the alternator. Try if you trust putting a used one in there from another low mileage caliber. Best of luck

Mar 04, 2010 | 2007 Dodge Caliber SXT Sport Hatchback

1 Answer

Fitted engine with 25k on it but the clock shows the mileage from the old engine how do i reset

you cant, all you can do is save copy of receipt with the mileage, this mileage isnt only for the engine but for the whole car,suspension,trany,drivetrain,ect, the mileage is programed into the computers memory.even if you some how replaced it the ture mileage can be retreived,lets say you got a used one that cluster needs to be reprogramed to your car,with the vin and mileage,as stated by computer, hope this helps.

Mar 03, 2010 | 2004 Audi A4

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