Never underestimate your Clients’ Complaint, no matter how funny it might seem!

WhiteWalker

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Never underestimate your Clients’ Complaint, no matter how funny it might seem!


This is a real story that happened between the customer of General Motors and its Customer-Care Executive. Please read on

A complaint was received by the Pontiac Division of General Motors:

This is the second time I have written you, and I don’t blame you for not answering me, because I kind of sounded crazy, but it is a fact that we have a tradition in our family of ice cream for dessert after dinner each
night. But the kind of ice cream varies so, every night, after we’ve eaten, the whole family votes on which kind of ice cream we should have and I drive down to the store to get it.

It’s also a fact that I recently purchased a new Pontiac and since then my trips to the store have created a problem. You see, every time I buy vanilla ice cream, when I start back from the store my car won’t start. If I get any other kind of ice cream, the car starts just fine.

I want you to know I’m serious about this question, no matter how silly it sounds: ‘What is there about a Pontiac that makes it not start when I get vanilla ice cream, and easy to start whe.never I get any other kind?'”

The Pontiac President was understandably skeptical about the letter, but sent an engineer to check it out anyway. The latter was surprised to be greeted by a successful, obviously well educated man in a fine neighborhood. He had arranged to meet the man just after dinner time, so the two hopped into the car and drove to the ice cream store. It was vanilla ice cream that night and, sure enough, after they came back to the car, it wouldn’t start.

The engineer returned for three more nights. The first night, the man got chocolate. The car started. The second night, he got strawberry. The car started. The third night he ordered vanilla. The car failed to start.

Now the engineer, being a logical man, refused to believe that this man’s car was allergic to vanilla ice cream. He arranged, therefore, to continue his visits for as long as it took to solve the problem. And toward this end he began to take notes: he jotted down all sorts of data, time of day, type of gas used, time to drive back and forth, etc. In a short time, he had a clue: The man took less time to buy vanilla than any other flavor. Why? The answer was in the layout of the store.

Vanilla, being the most popular flavor, was in a separate case at the front of the store for quick pickup. All the oTther flavors were kept in the back of the store at a different counter where it took considerably longer to find the flavor and get checked out. Now the question for the engineer was why the car wouldn’t start when it took less time.

Once time became the problem — not the vanilla ice cream — the engineer quickly came up with the answer: vapor lock. It was happening every night, but the extra time taken to get the other flavors allowed the engine to cool down sufficiently to start. When the man got vanilla, the engine was still too hot for the vapor lock to dissipate.

Moral of the story: Even crazy looking problems are sometimes real and all problems seem to be simple only when we find the solution, with cool thinking.
 

වල්පාල

Junior member
  • Jul 19, 2014
    422
    17
    18
    Everytime i`m getting this kind of issues from my lovely applications. We are always happy and answer all silly question by staying overnights :( :(
     

    SHEHAN_GIWANTHA

    Well-known member
  • Dec 24, 2013
    11,872
    11,626
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    Vapor lock is a problem that mostly affects gasoline-fueled internal combustion engines.

    It occurs when the liquid fuel changes state from liquid to gas while still in the fuel delivery system. This disrupts the operation of the fuel pump, causing loss of feed pressure to the carburetor or fuel injection system, resulting in transient loss of power or complete stalling. Restarting the engine from this state may be difficult.

    The fuel can vaporize due to being heated by the engine, by the local climate or due to a lower boiling point at high altitude. In regions where fuels with higher volatility are used during the winter to improve engine startup, continued use of the specialized fuels during the summer can cause vapor lock to occur more readily.
     

    SHEHAN_GIWANTHA

    Well-known member
  • Dec 24, 2013
    11,872
    11,626
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    attachment.php



    Default
    Quote:
    Originally Posted by REGMARINE26FS View Post
    I have (2) 2002 F225 and vapor lock is my issue. along with many others reporting the exact same problem.

    and i was not suggesting the fuel loop back to the tank...i was suggesting a looped relief path, as it exists on my F225's today.
    One problem is that fuel being looped around a fuel pump causes the temperature of the fuel to rise. It can get quite hot actually. When the motor is at low RPM, and not using much fuel, then the looping of the fuel can become a problem with bad stuff happening. That is why Yams use a fuel cooler and in your case the lift pump that only runs for ten seconds out of every thirty seconds. The pump stops pumping for twenty seconds so as to minimize the temperature build up of the fuel. If there was only one fuel pump in the system, and if that pump was in the fuel tank or at the fuel tank, and if surplus fuel was routed back to the tank instead of simply being looped around a pump, the fuel would be much cooler. It would also get refiltered every time it came out of the tank. Not going to happen however because of integration issues.

    Early model motors dumped VST vapors into the intake system. Too much fuel vapor in the intake manifold causes an overly rich mixture. It can be so rich that the motor won't start or run. Just like an automobile being flooded. The more volatile the fuel, and the hotter the fuel becomes due to a pump working on it or the VST being in close proximity to a hot block, causes the fuel to boil. That boiling action send fuel vapors to the intake manifold causing the problem.

    Here is a diagram of an early Yam. Note that the VST vent line runs straight to the intake manifold. Later Yams have a different design that uses a shutoff valve and a charcoal cannister vapor recovery system.
     

    Naughtykolla48

    Well-known member
  • Nov 13, 2017
    12,406
    11,131
    113
    හඳට කිට්ටුව
    Never underestimate your Clients’ Complaint, no matter how funny it might seem!


    This is a real story that happened between the customer of General Motors and its Customer-Care Executive. Please read on

    A complaint was received by the Pontiac Division of General Motors:

    This is the second time I have written you, and I don’t blame you for not answering me, because I kind of sounded crazy, but it is a fact that we have a tradition in our family of ice cream for dessert after dinner each
    night. But the kind of ice cream varies so, every night, after we’ve eaten, the whole family votes on which kind of ice cream we should have and I drive down to the store to get it.

    It’s also a fact that I recently purchased a new Pontiac and since then my trips to the store have created a problem. You see, every time I buy vanilla ice cream, when I start back from the store my car won’t start. If I get any other kind of ice cream, the car starts just fine.

    I want you to know I’m serious about this question, no matter how silly it sounds: ‘What is there about a Pontiac that makes it not start when I get vanilla ice cream, and easy to start whe.never I get any other kind?'”

    The Pontiac President was understandably skeptical about the letter, but sent an engineer to check it out anyway. The latter was surprised to be greeted by a successful, obviously well educated man in a fine neighborhood. He had arranged to meet the man just after dinner time, so the two hopped into the car and drove to the ice cream store. It was vanilla ice cream that night and, sure enough, after they came back to the car, it wouldn’t start.

    The engineer returned for three more nights. The first night, the man got chocolate. The car started. The second night, he got strawberry. The car started. The third night he ordered vanilla. The car failed to start.

    Now the engineer, being a logical man, refused to believe that this man’s car was allergic to vanilla ice cream. He arranged, therefore, to continue his visits for as long as it took to solve the problem. And toward this end he began to take notes: he jotted down all sorts of data, time of day, type of gas used, time to drive back and forth, etc. In a short time, he had a clue: The man took less time to buy vanilla than any other flavor. Why? The answer was in the layout of the store.

    Vanilla, being the most popular flavor, was in a separate case at the front of the store for quick pickup. All the oTther flavors were kept in the back of the store at a different counter where it took considerably longer to find the flavor and get checked out. Now the question for the engineer was why the car wouldn’t start when it took less time.

    Once time became the problem — not the vanilla ice cream — the engineer quickly came up with the answer: vapor lock. It was happening every night, but the extra time taken to get the other flavors allowed the engine to cool down sufficiently to start. When the man got vanilla, the engine was still too hot for the vapor lock to dissipate.

    Moral of the story: Even crazy looking problems are sometimes real and all problems seem to be simple only when we find the solution, with cool thinking.


    Patta, TFS +