An easy quiz
 

This one’s much easier than bigwhitecobra’s quizes. Enjoy.


1. An EFI system is unable to change the pulse widths of the injectors, which of these could cause the problem?

a. A defective fuel pressure regulator.
b. A bad oxygen sensor.
c. A weak fuel pump.
d. A defective ECM.


2. An EFI engine has an irregular idle speed when cold:

Tech A says that the problem could be caused by a bad oxygen sensor.
Tech B says that the problem may be a faulty Idle Air Control (IAC) system.
Who is right?

a. Tech A only.
b. Tech B only.
c. Both A and B.
d. Neither A nor B.


3. A car equipped with a smog pump system backfires during deceleration, which of these could be the cause of the problem?

a. Defective diverter valve.
b. Defective air pump.
c. Leaking air manifold.
d. Defective air pump check valve.


4. A vehicle hesitates when the throttle is opened quickly, which of these is a possible cause of the problem?

a. Retarded ignition timing.
b. Low fuel pump pressure.
c. Cracked distributor cap.
d. Engine is overheating.


5. While inspecting a set of spark plugs, you find one plug that has a badly burned electrode, what is the most likely cause of the problem?

a. An open spark plug wire.
b. Worn piston rings.
c. Ignition cross firing.
d. Worn camshaft.


6. Which of these will NOT cause a tapping noise while the engine is running?

a. A loose exhaust manifold.
b. Valves that are out of adjustment.
c. Poor lubrication.
d. A burnt exhaust valve.


7. When replacing piston rings:

a. Use a ball hone to remove deep scratches from the bore.
b. Use a finish hone to remove deep scratches from the bore.
c. use a ball hone to deglaze the bore.
d. use a coarse hone to deglaze the bore.


8. All of these will cause low compression readings, EXCEPT:

a. Valve problems.
b. Piston ring problems.
c. A slightly slipped timing belt.
d. Worn cylinder walls.


9. Which of these is a true statement about oil pressure?

a. The pressure will be high if the oil clearances are greater than normal.
b. The pressure will be high if the pressure regulator is defective.
c. The pressure will be low if there are blockages in the oil passages.
d. The pressure will be low if high viscosity oil is used in the engine.


10. All of these could be the cause for one power door lock not working, EXCEPT:

a. Binding lock linkage.
b. A defective circuit breaker.
c. A defective door switch.
d. A defective motor or solenoid.

Take care,
-Chris

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Retired Moderator
MustangNet

My site: Peckerwoods Pit Stop

http://homepage.mac.com/pkrwud/.Pict...sc./MyMac.jpeg

My teams site: Jim Porter Racing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN.

i know im up late & should be asleep, hell i think i am anyway but im mainly guessing , here goes 1-b, 2-c 3 -b?,4-C? ,5-D? 6-a 7-c 8- c 9-b? 10 -b, well lets see for somebody who's been awake for 12 hour's see ya. marty

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2000gt black,broke a$$ steet racing

Well I'm dyin' to know how bad I did Chris! I dont want you to give away all the answers, but maybe you could tell me how many I got right.
andy

Andy, you missed 3 and Marty missed 6.

Take care,
-Chris

------------------
Retired Moderator
MustangNet

My site: Peckerwoods Pit Stop

http://homepage.mac.com/pkrwud/.Pict...sc./MyMac.jpeg

My teams site: Jim Porter Racing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN.

dang chris im good huh?jk i figured at least that many,see ya

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2000gt black,broke a$$ steet racing

Chris, here are my answers and my rationalizations. http://www.mustangworks.com/msgboard/smile.gif

d. A Defective ECM.

I'm not really sure about what you were asking. If the O2 sensors were 100% bad, the ECM wouldn't be able to adapt by changing the pulse width, but the pulse width would still be changeable based on MAF, BAP, ECT, and ACT readings.

A weak fuel pump or defective FPR would be the cause of a pulse width change, not the limitation.



B. Tech B.

I think the "when cold" is the key here. When the engine is in cold startup, it's using open loop and therefore the O2 sensors aren't active. Even if the O2 sensors were defective and the computer adapted by richening the fuel mix, a rich mixture is good for cold startup conditions.



a. Defective diverter valve.

This is a tricky question so I'm not sure about the answer, but given the options, only the diverter valve seems to make sense. A bad check valve would allow exhaust to flow backwards into the diverter valve and air pump wich would damage the other components and maybe eventually cause a backfire, but I'm thinking you want the one defective component that would cause such a problem. A bad pump would just not pump air which would be no big deal other than the eventual clogging of the cats.



a. Low fuel pump pressure.



c. Ignition cross firing.

I'm assuming that by burnt, you mean melted. Preignition and cross-firing would cause electrodes to melt.



d. A burnt exhaust valve.

The other three options can clearly cause a tapping noise. A burnt exhaust valve may allow for low compression or backfiring because of fuel getting into the exhaust manifold, but it wouldn't really be a tapping noise.



c. use a ball hone to deglaze the bore.



c. A slightly slipped timing belt.

The other three are obvious causes and a slightly slipped timing belt wouldn't be off timing enough to allow a valve to be open on the compression stroke to reduce compression.



b. The pressure will be high if the pressure regulator is defective.

Large oil clearances will cause low pressure.
A blockage will raise pressure.
High viscosity means that it is thick oil and, therefore, will flow harder causing the pressure to go up.



b. A defective circuit breaker.

A defective circuit breaker would cause a failure in both locks.



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351W 89 Mustang GT Convertible

EXCELLENT!!!

Not only did you get them all correct, you saved me the trouble of typing out the explainations!!!

Very good, Jim, but honestly, I'm not surprised. I would be proud to work with you.

Take care,
-Chris

------------------
Retired Moderator
MustangNet

My site: Peckerwoods Pit Stop

http://homepage.mac.com/pkrwud/.Pict...sc./MyMac.jpeg

My teams site: Jim Porter Racing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN.

Thanks, Chris. Maybe we will someday. http://www.mustangworks.com/msgboard/smile.gif I know I sure as heck wouldn't mind working with you. It's not like I answered first, though. I only had to figure out which ones that Andy669 and crazy horse gt got wrong. http://www.mustangworks.com/msgboard/smile.gif

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351W 89 Mustang GT Convertible