The throttle position sensor is designed to monitor the position of the throttle butterfly valve in relation to the throttle pedal position. If the engine runs rough when it is plugged in and runs fine when it is unplugged, then...
You're halfway there. The headless bolts you see are indeed a security feature. The heads are designed to twist off when the bolts are tightened. Obviously if they just unbolted, it would be far too easy for a car thief...
Hi there: Once the vehicle starts, the job of the battery is pretty much done; which means if you're having issues with the vehicle shutting off, it's most likely caused by ignition system components; such as a the distributor or...
Considering that this car is one of a kind, I can imagine that the maintenance costs of this vehicle would be very high. I would likely cost hundreds of dollars just to get an oil change. It would likely cost...
You will need to have the skid control ECU scanned for proper input from parking brake to see if the fault is in the parking brake, ECU or instrument cluster. A mechanic like one from YourMechanic can come and test...
Yes they do. I have a lot of customers that have had them go bad, and usually it was before 100,000 miles. Don't buy the Hummer. They have all kinds of problems. That's one of the reasons they stopped making...
Hello. It is difficult to get much better fuel economy then what you are currently getting. The only way is by driving the car easy and maintaining it. Using synthetic oil, a high flow air filter, making sure that the...
It sounds like you may have a lock solenoid failure. A lock solenoid is a magnetic device that pulls the lock mechanism to lock and unlock the door. If you can hear the solenoid clicking in the door, you may...
The three trouble codes do not constitute a diagnosis, at all. All the three codes do is point to vehicle systems, each of which in turn contain many individual parts, wiring and so forth, any of which could be the...
Your throttle position sensor says it is on the throttle body assembly. Look at the gas pedal position sensor, above the gas pedal, to see if this is the sensor the parts store gave you. This sensor is called the...
Hi there, thanks for writing in. I'd be happy to provide my insight. This is a common issue in the Chevy Cobalt. The electrical system on modern cars is very sensitive and everything needs to be working nearly perfect in...
Hi there, from the symptoms you have described, it sounds more like a fuel issue. Either the fuel pump is failing and not pumping enough fuel into the engine, or some component such as a coolant temp sensor or fuel...
The most common cause is the cooling fan is not coming on or there is a restriction in the airflow across the radiator. You should have this checked first then see if the radiator is flowing coolant through all the...
Hello. If you are using the base engine then you should be just fine. The intake and exhaust as well as the sensors will work different so all of that will need to be switched over.
Hi there. The following steps are to check for top dead center on your engine. Remove the left valve cover on the engine rotate the crankshaft until the key way is facing up Check the camshaft on the left...
The speedometer is controlled by the PCM (Powertrain Control Module). The PCM receives data from the ABS module then sends it to the instrument cluster. In all, there are three modules, and a VSS (Vehicle Speed Sensor) involved with the...
This change oil soon light is telling you it is time to get the oil and filter changed. Whoever changes the oil and filter for you will need to reset the light for you so you can start fresh until...
If you can hear the chain whining while you drive, it's time to quit driving the car. If the timing chain breaks while you are going down the road, the damage that will occur will probably mean replacing the engine....
There are two most likely possibilities, one is the linkage from the inner door handle to the door latch has become detached or that the door latch assembly is faulty. To determine if the linkage or latch is the issue...
You should not use tap water since it has added chlorine, calcium, and other additives that de-ionized water will not. You can purchase coolant already pre-mixed 50/50 or mix it yourself with de-ionized water and coolant mixed 50/50. You can...
Hello. This problem is common to Hummer H3s. It is an involved fix, and most of the incidences are related to the front drain tubes, as the vehicle sits at a slight rake to the front. Access to these is...
Check for problem codes - you mention that the Check Engine Light is on. This could be the torque convertor clutch not releasing as you slow down, or not locking up smoothly when you reach 40-50 mph accelerating. And yes,...
