Holden Problems

A build-up of dirt on the sensors can affect the operation, but it would need to be a heavy build-up. I wouldn’t think dust would be enough to do it. Have them checked at the next service.

I believe Orbital supplies the HSV system and I can't think of any reason that you couldn't fit an Orbital system to your car. It would have to be tuned differently, of course, because your engine is different to the HSV one. There are other liquid-injection systems available, as well as some very well developed vapour-injection systems. One you could check out is the Impco system. The beauty of injection systems is that you can tune them to produce the same performance on LPG and on petrol. Without being exact you could expect to recover the cost of installing a system in around 18 months.

The hard covers are made by outside vendors and supplied to the carmakers, like many hundreds, even thousands of parts that go into the cars we drive. They are supplied to the specifications of the carmaker and the carmakers check them to ensure they meet the specifications. They assess the likely impact of each part on the car's crash performance and decide what they will submit to ANCAP for testing.

What you bought is an old car, and old cars are often worn out, so what you’ve replaced is not to be unexpected. You’re so far into it that it’s best to keep going rather than pull out and lose what you’ve put into it, particularly because it’s an SL/E, which will be worth more than a regular old Commodore when you’ve finished it. The ultimate decision on how much to invest in the car should be based on the condition of the body and interior. If all of that’s in good condition it would be worth spending the money you’re spending, but if it’s rusty or needs repairs to the panel work I would suggest you think about getting out of it.

It’s impossible to say, but I would err towards the GPS. It’s most unusual for a speedo to read higher than the real speed, it’s usually the other way around. I would crosscheck the GPS on another car.

It’s going lean for some reason and not getting the enrichment it needs to accelerate. Check the throttle body.

No, it won’t be, as long as they do the service as per the Holden service schedule.

The hard covers are made by outside vendors and supplied to the carmakers, like many hundreds, even thousands of parts that go into the cars we drive. They are supplied to the specifications of the carmaker and the carmakers check them to ensure they meet the specifications. They assess the likely impact of each part on the car's crash performance and decide what they will submit to ANCAP for testing.

I would have the wheels and tyres balanced, then start looking at rear suspension bushes and drive shafts.

We haven't had any other reports of an issue with the seat bracket. One possible way of getting around the problem would be to slide then seat back before getting out, and sliding back into position when you get back into the car. That way you can possible avoid sitting on the bracket while getting in or out of the car.