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I would check the fuel pressure (for being low) before doing anything else. If it is, check the fuel pressure regulator. (A clogged catalytic convertor would be a constant problem, not intermittent as you describe.) A professional mechanic, like one...

This may potentially be a poor engine running condition such as a lack of fuel delivery which could cause it to run poorly resulting in vibration. Are there any check engine lights on? If so, I would recommend having the...

Fuses and fusible links may have opened due to the short circuit. Inasmuch as the vehicle does not start, the simplest thing to do is diagnose the starting circuit first as, in the course of that, other fundamental failures (for...

There are a couple of approaches to take here - either start from the battery and work "towards" the fuel pump, fuse box, ignition switch, fuel pump relay, and wiring connections in between. Or, as you have done, start at...

There are a few things that will keep the smart key from operating properly: 1. Another smart key is near the vehicle. 2. A mobile transmitter, such as a cell phone, is too close to the smart key. 3. A...

Hello there. It does sound like your 1996 GMC C2500 has gone through an excessive amount of brake components. There are a few things that can cause premature brake component failure. Sticking calipers and wheel cylinders are the most common....

The misfire is most likely from a vacuum leak either in the PCV hose or valve or the intake manifold itself has a leak in the housing. Replace the PCV valve and check PCV hose and then if problem continues...

The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the battery passes a load test be sure it is NOT a marginal pass in which case you...

Hello, and thank you for writing in. The vehicle is programmed to honk under certain circumstances. There is no way to stop the honking unless you change your behavior when using the key fob, and even then, there are honks...

Hello. The codes listed are for problems with the electrical circuits of ignition coils A, B, and C. If the coils have been replaced it may be possible that the wiring to them is the source of the issue. You...

Hi There, It sounds like the throttle body has not been put through a "relearning" process. When the throttle body is replaced, this often times requires that the car go through a process which helps to re-calibrate the throttle body....

Check the exhaust system for any leaks before the oxygen sensors. This can contribute to having more oxygen in the exhaust stream causing the sensors to register a false reading. If there is no leaks in the exhaust, then check...

The first thing to check is whether the brake pad material has worn down to the minimum level. If it has, the noise can likely be resolved by installing new brake pads and re-surfacing (or replacing) the brake rotors. If...

Ultimately, you are the only one that can make that decision. I would suggest having a mechanic do a vehicle inspection before setting out on a long trip like this, as 3000 miles will pass some maintenance milestones. Having an...

Hi there: In general, a SAAB is one of the more expensive vehicles to maintain, just for the simple cost and availability of aftermarket part options. However, they can be very dependable vehicles if they've been properly serviced over the...

Hello, and thank you for writing in. The battery is likely going bad. There are a lot of presetting and memory that the vehicle must store when the car is off, and this pulls a small amount of electrical power....

Some of the 2007 Suburban's are included in the Takata air bag recall campaign. You can find out if your car is affected by the Takata recall by inputting your VIN number at the NHTSA website. If the air bag...

The relay is on the driver side right next to the brake booster and master cylinder. It looks like a large black block by the fender. For the compressor to not have power to it, check the low pressure switch...

Hello, This may be a problem with fuel pressure or potentially a dirty or faulty mass air flow sensor. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor....

I hate not being able to help you with this. This is a very Nissan specific issue you are having. As I was reading your question, my initial thought was the door switch, but you said other lights are being...

Hi there. When a spark plug has excessive oil on the plug, then there is excessive oil getting into the cylinder. This will foul out the spark plug and cause a misfire. The misfire is causing the engine to be...

Hello, thanks for your question. From what you describe it would appear that your vehicle has suffered some sort of transmission-related mechanical issue. Transmission grinding and popping is usually an indicator that the transmission has developed some sort of internal...

Hi. I think you have a problem with the clutch master cylinder having an intermittent problem. The clutch master cylinder is just like a brake master cylinder and the O rings in the cylinder go bad causing air to get...