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5
votes
2answers
46 views

The top speed in the my owner's manual seems to be too low. Is this normal?

How the quoted figures for top speed determined for a car (from 2003)? To be specific, my 2003 Opel Agila 1.2i has a quoted top speed of 96mph, but I have exceeded this on several occasions on flat ...
6
votes
1answer
432 views

Does driving at top speed damage a car or stress the engine?

Lots of manufactures like Vauxhall/Opel and Ford seem to test their new models of cars by driving it at top speed for hours on end. What is the point of this? Does it stress an engine?
3
votes
1answer
50 views

How do I test fuses with a circuit tester?

Lights all flicker. When I an in the cabin the head lights flicker. I want to test my fuses with a circuit tester. Should the engine be running or will I be blown away? Please help, I'm a newbie ...
4
votes
1answer
93 views

How Many Times to Crank During a Compression Test

I've read a number of different recommendations on how many times to cranks the engine during a compression test. I've read those that say to crank until you reach a stable reading. In the book, ...
5
votes
2answers
101 views

How is barometric pressure related to emissions testing?

In the VW emissions cheating scandal, news reports say the following: According to the EPA, "the position of the steering wheel, vehicle speed, the duration of the engine's operation, and barometric ...
2
votes
1answer
70 views

Checking a fuel pressure regulator that is out of the car

I happen to have a fuel pressure regulator of a petrol car lying around left by the previous owner and suspect that it might be still good, since the previous owner was just changing parts randomly ...
5
votes
1answer
485 views

Is cylinder leak down test needed if compression test results are fine?

If I compression test my engine and the results are fine, could there ever be any need to leak-down test it as well? IOW, can a leak down test ever fail if the compression test is fine. RELATED: ...
2
votes
1answer
176 views

Cylinder Leak-down vs Compression Test

I understand that both cylinder leak down and compression tests are used to test for cylinder head, cracks, warps, and gasket leaks. I understand the difference between how each works: compression ...
3
votes
1answer
20 views

How does cylinder leakage tester kit work?

I was browsing Amazon in search for a combustion leak detector (AKA "block tester") and I stumbled upon a cylinder leakage tester kit, which is supposed to do similar things? But I am not quite sure ...
3
votes
0answers
69 views

Is there a way to test ignition coils with built-in ICM?

My car's service manual shows this for the ignition coils: What is the ICM? Related to http://mechanics.stackexchange.com/a/2850/31, is there a way to check the coils to see if they are working ...
4
votes
1answer
211 views

Block Test: Can't suck any more air, is this normal? (1999 Suburban)

I performed a block test recently to diagnose a problem I'm having. The liquid stayed blue, but I want to clarify I have done this right. The purpose of the test was to see if I could prove a head ...
0
votes
0answers
20 views

Car Radiator Fan may have a Fault, I'm an electrical noob [duplicate]

I took the fan out from my engine compartment and am now ready to test it. It consists of two fans, one larger than the other connected I believe in series with two large wires, one red, one brown ...
4
votes
2answers
3k views

How do I know when to replace shock absorbers?

In my last trip to the shop, the mechanics told me that I should replace my shock absorbers. When I inquired as to why, I don't feel that they were very clear with their answer, like they normally ...
7
votes
2answers
7k views

Test Gasoline for Water Content

I live in a small town, and the Gas station there has a bad reputation for gas quality. With rumors like peoples gas tanks freezing solid and such. Is there a quick, safe, cheap way to test for ...
1
vote
1answer
55 views

Strokes during compression test?

Just wondering what the general consensus out there for the amount of times the vehicle turns over during a compression test? I have heard anywhere from 5-8, and personally crank 7. What is the ...
6
votes
4answers
2k views

Finding a possible vacuum leak

One of our cars has a bit of a rough idle which disappears at about 1,000 RPM. After eliminating everything else I concluded that this is due to a minor vacuum leak. This was confirmed by the use of a ...