Questions tagged [testing]
The testing tag has no usage guidance.
58 questions
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Is it acceptable for new catalytic converter to have a pin hole leak at a weld?
Is it acceptable or normal for new catalytic converter to have a pin hole leak at a weld? I found the pin hole by turning out the lights, and shining a spotlight into the end of the unit, and then ...
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Is propane test for vacuum leaks a fire hazard?
I have a vacuum leak somewhere along my air intake. I researched it and the best way to find it seems to be the propane test where you attach a couple of feet of hose to the nozzle of a propane torch ...
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Testing Entune 3.0 of a dealer-owned 2018 Sienna LE
I'm in the process of test driving a used 2018 Sienna LE from Hertz Car Sales. Between my mechanic and I, we have tested everything I wanted tested, except the Entune 3.0 system.
When trying to ...
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Can you use a piece of paper to test the seal of a bore?
I was watching a YouTube video the other day and in it you see a middle aged man and a younger man next to him. They're working on an engine, the younger man cranking the shaft, and the older man is ...
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How can I test a transmission I just got from the junkyard without putting it in my truck
I have two transmissions that I got for free from the junkyard how can I test them to see if they work they go in a 99 f150
I would rather not put both in to find out they both don't work
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Testing valve grind job that previously leaked
I had a leaky intake valve so I took that cylinder head off to grind it. Before grinding, I tested that it was indeed leaking and that the other two cylinders in the head did not by setting it on ...
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Testing piston ring
One of my cylinders is leaking and I have determined so far that at least one or both of the intake valves are leaking. However, now that I have that cylinder head off, I would also like to test the ...
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Cylinder leakdown threshold
I did a cylinder leakdown test on my 6 cylinders and they range at 75-80% retention, meaning 20-25% leaking. What is an acceptable rate of cylinder leaking?
If the leak in a certain cylinder is higher ...
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How to test a battery the alternative way?
Aside from buying a battery tester, is there any other way to check it? I presume under full load with the engine, lights, etc.
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How do I test the Door lock relay on a Dodge TIPM?
I have a 2011 Dodge Ram.
The drivers door lock switch does not lock the doors.
The passenger door lock switch will lock all doors, including the drivers.
I replaced the drivers door switch with a new ...
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Upstream O2 sensor stays at 0.4V
To test the upstream O2 sensor on a 2011 Toyota Corolla, I backprobed it with a multimeter.
After I idled the engine for a few minutes to warm it up, the multimeter shows a steady voltage of 0.4V.
But ...
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Will regular slamming of car doors cause damage during the lifetime of the vehicle?
How long would door slamming take to affect the regular functioning of the vehicle in any way, and are there any ways to find how many door slams a door for a particular individual make/model can take ...
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Will a carbureted engine have different fuel consumption rates based on external load, with the same RPM?
I have a small Briggs and Stratton Model 19 engine, net power of 10.0 HP. If I ran the engine at full throttle without any external load connected to the output shaft, would it consume the same amount ...
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Emissions - High CO Reading
My 2004 Volkswagon Polo has just failed its emissions test. It has failed on the CO only, everything else is okay. The results are as follows:
Engine/Oil Temperature: 92℃
(720 RPM) Low Idle
CO 0.32 ...
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testing auto 4L60E transmission while not in vehicle
is it possible to test while not installed in vehicle my auto 4L60E transmission
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My 2008 Mazda 3 TS D passed it's MOT, but with seemingly low service/parking brake efficiency. Should I be worried?
I have a 2008 Mazda 3 TS D. It's my first car, so I'm still unsure as to what is normal and what is not. I'm in the UK (Northern Ireland).
It recently (Saturday) passed it's MOT, but the parking/...
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Can knocking noises caused by anti roll drop links be intermittent or just not detectable until they get worse?
So I was getting a knocking noise from under car and mechanic 1(who just had axle stands i.e. no ramp) said its either the anti roll bar or ball joint and there was no way of knowing which you just ...
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Are mineral oil smoke test machines sensor safe?
So there's heaps of DIY smoke test machines demonstrated around the web.
I learned to built one of these, was kinda fun. It worked, even found a crack on my air intake that was messing with the ...
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Determining Expected Battery Voltage With Vehicle Running
To my understanding, a simple first-step for testing the alternator and related components on a vehicle is to monitor the voltage (using a multi-meter) at the battery while the vehicle is running. ...
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Electrical Diagnostic Procedural Lists [closed]
Post your general/specific Testing/Diagnostics Procedural Lists for Automotive Electrical Systems.
These procedures are intended to target vehicles with modern 12V systems.
The format of the site ...
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Dealership's service dept drove my car 19 km
I left my car at the dealership for a few hours today to get my suspension looked at and to find out what was causing the creaking noises coming from the back. The service advisor told me that the ...
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Fuel Pressure Relief Procedures - Evaluating Different Approaches
Relieving fuel system pressure is obviously an important prerequisite to many repairs and maintenance tasks. However, it seems as if there are a variety of recommendations to relieve the fuel pressure....
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Hyundai tester software
Is there any PC software to see the sensors value and change there parameters, or how I can do that for my Hyundai.
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How to figure the best state of tune for custom four-stroke single?
Hullo all,
I will try and keep this short and straightforward. I have a 160cc 4 stroke single cylinder motorcycle. I have installed a big bore kit, a high-lift camshaft, a performance CDI, free-...
user30065
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How to Tell No MOT Advisory Notes?
In the UK, the MOT test may contain advisory notes but as far as I understand these are optional. One can also check the MOT history of a vehicle through Gov.UK web site. However I don't understand by ...
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Should I do combustion gas test in radiator or reservoir neck?
I bought this cooling system combustion leak tester. I have a few questions regarding its usage:
While the instructions say take off the radiator cap and insert tester, it appears that at least some ...
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What is surface charge and how does it affect battery testing?
I've read in numerous places that "surface charge" can give false positives when testing a battery, and you need to remove the said surface charge to get an accurate result. I've also read various ...
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Results surprising said lab reporter of emission testing on Toyota Qualis Diesel 4 wheeler on AVL DiTest MDS 205
I got emissions of Toyota Qualis Diesel car tested with the AVL DiTest MDS 205, the result sheet had following columns rpm, temp, secs, CO(%vol.), CO corrected, CO2(% vol.), HC(ppm),HC corrected(ppm),...
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Emissions - High CO reading only
My 1999 Honda CRV has just failed it's UK MOT test on emissions.
Results are below:
1st test:
CO 0.73 (FAIL - max is 0.30)
HC 78 (PASS - max is 200)
Lambda 1.008 (PASS - between 0.970 & ...
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What do professional battery testers actually measure?
When a garage hooks up their battery tester what does it actually measure and how does this differ from tests you might perform yourself with a volt-meter?
For example, recently a garage measured my ...
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When will a new emission driving cycle be implemented?
For emssion tests, they have used the NEDC driving cyle here in Europe for quite a while now. I'm not sure about America and Asia, but i believe they use similar driving cycles. After the emission ...
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How Long to Power the Injectors for a Fuel Pump Volume Test?
I want to do a fuel pump volume test on my 98 Mazda 62 2L GF, but the WSM doesn't say how long to energize the injectors:
I'll probably activate the injector by back probing the injector ground wire ...
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Is 12 volts safe for testing injectors?
I'd like to do a volume test on my injectors, and was thinking that I would activate each one by jumpering it to the battery ( about 15 seconds per injector. ) The thing is that if I understand ...
- 15.7k
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Tie-rod final test
After replacing the tie-rod and bellows boot, the steering wheel was rotated left + right: wheels moved as expected. Is there any other simple test that could / should be done?
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Have my tyres been tampered with?
I took my car to the garage and arranged with them to replace all 4 tyres. I'd order the tyres to the garage and they'd fit them. I also asked the mechanics to check the tyres manufacturing date and ...
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Is the diagnosis from a battery/starter/alternator tester meaningful?
At many auto parts stores they will test - often for free - a vehicle's electrical system by attaching a device to the positive and negative terminals of the battery. That's all they do. Then you ...
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Are resistance/capacitance based brake fluid testers reliable?
I would like to test my brake fluid to see whether it needs replacing rather than spend the time and money on it unnecessarily. I've seen inexpensive brake fluid testers on the market which work on ...
- 17.7k
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Do no-name tires go through thorough testing?
Tire (tyre) brands come in three categories:
Major brands that advertise extensively
Relatively unknown brands that are actually made by the major brands
Relatively unknown brands that are ...
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Hand-testing Shock Absorbers
Does manually hand-testing shock absorbers have any validity for checking if a shock is good or bad? Does hand-priming shock absorbers help?
I usually hand-prime shock absorbers that I feel are ...
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The Testing Procedure for the Mazda 626 Alternator in the WSM is Unclear
I have some questions regarding the alternator testing procedure outlined in the 98 US work shop manual ( this is related to my battery warning light question ), my car has the FS engine:
When it ...
- 15.7k
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How to test the function of a water pump?
Is it possible to test a water pump for proper function (ability to move a certain volume of coolant) without disconnecting it from the engine? If so, how would one do that?
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What Is The Output Voltage For The Mazda 626 GF 2L 98-2002 Coil Pack?
I've seen aftermarket "high voltage" coils that output 40kV, but what is the output voltage for the standard OEM coil pack?
I want to use a spark tester with an adjustable gap to check the strength ...
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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 ...
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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?
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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 ...
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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, ...
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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 ...
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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 ...
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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: ...
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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 ...
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