Re: [DMCForum] Re: Hotstart (New accumulator and pump
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Re: [DMCForum] Re: Hotstart (New accumulator and pump



I am using Walt's rig that you mailed back. It does not appear to be
running lean. I have not checked the spark when it is cranking though.
Guess I'll be having Hervey send along the o-rings.

Samuel

cruznmd wrote:

>Samuel,
>
>Are you not using a fuel pressure test rig with a 3-way "T"?
>
>I tried that and couldn't figure out what I was measuring either. Try
>to get a "T" or the right test rig. You have done the right things so
>far, but John is right. The primary pressure regulator also has a
>check valve to maintain rest pressure. If it's leaking, you'll lose
>it.
>
>2 more things;
>
>1. It is unlikely but possible that your vacuum leaks are creating a
>lean condition while starting that prevent a hot-start. Better plug
>them up to eliminate the possibility.
>
>2. Also unlikely, but worth checking is your ballast resistor and
>relay. Are you getting the full spark when you crank? If not, you may
>have trouble igniting the leaner mixture when the engine is warm.
>
>I mailed Walt's test rig back to him and I show that it was delivered
>so borrow it from him and check rest pressure again. If you have good
>rest pressure, plug those leaks, check that spark and enrich yourself
>a hair as John suggests.
>
>Hope this helps,
>
>Rich
>
>--- In DMCForum@xxxxxxxxxxxxxxx, Samuel <samuel_yahoo@xxxx> wrote:

>
>>The new accumulator came with the car. I think the owner got it
>>   
>>
>from

>
>>houston. The engine already runs fast (~1500 rpm) and has some
>>   
>>
>vacuum

>
>>lines disconnected under the intake. I need to get that fixed also.
>>
>>Samuel
>>
>>John Hervey wrote:
>>
>>   
>>
>>>Samuel,
>>>If you got the accumulator from me there should be a what I call
>>>     
>>>
>Hot Start 2

>
>>>kit with it. It's the O ring s that go in the fuel distributor
>>>     
>>>
>primary

>
>>>pressure regulator where it can leak down also. If that has been
>>>     
>>>
>replaced

>
>>>and it still won't start hot, then I would enrich the 02 setting
>>>     
>>>
>just a

>
>>>hair.
>>>John
>>>
>>>
>>> -----Original Message-----
>>> From: Samuel [mailto:samuel_yahoo@xxxx]
>>> Sent: Sunday, March 07, 2004 2:24 PM
>>> To: dmcforum@xxxxxxxxxxxxxxx
>>> Subject: [DMCForum] Hotstart (New accumulator and pump
>>>
>>>
>>> I was having a hot start problem, the accumulator was known to
>>>     
>>>
>be bad so

>
>>> it was replaced. The hotstart persisted so the check valve on
>>>     
>>>
>the pump

>
>>> was also replaced. I still have a hot start issue and dont want
>>>     
>>>
>to

>
>>> guess. No matter how long I crank, it wont start, it has to cool
>>>     
>>>
>for

>
>>> about 2 hours. Doing a plug swap does not allow it to start, and
>>>     
>>>
>did not

>
>>> allow it to start since I've had the problem. It should be
>>>     
>>>
>noted, the

>
>>> hot start came with the car, it didnt show up recently.
>>>
>>> I put a pressure tester on the system, as the tech manual shows
>>>     
>>>
>on page

>
>>> 62. After running the engine and letting it warm up (about 30
>>>     
>>>
>minutes of

>
>>> running), the valve was closed to the line from the pressure
>>>     
>>>
>regulator

>
>>> (so the guage shows pressure at the top of the distributor) and
>>>     
>>>
>the

>
>>> engine turned off. The pressure dropped down to ~3.5 bar, then
>>>     
>>>
>after

>
>>> about 10 minutes settled around 2.9 bar. I have managed to
>>>     
>>>
>confuse

>
>>> myself as to what I am measuring. I am unsure if i'm measuring
>>>     
>>>
>the

>
>>> control pressure, or the primary pressure.
>>>
>>> If I am measuring the primary pressure, then that would mean the
>>> accumulator and check valve in the pump are good, so my hotstart
>>>     
>>>
>is from

>
>>> something else (note, my distributor has been messed with in the
>>>     
>>>
>past).

>
>>> If I am measuring the control pressure, then how do I measure the
>>> primary pressure (turn guage around? Thought that would measure
>>>     
>>>
>pressure

>
>>> back to the tank).
>>>
>>> Samuel
>>>
>>>
>>>
>>>-------------------------------------------------------------------
>>>     
>>>
>---------

>
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>>>     
>>>
>of Service.

>
>>>
>>>[Non-text portions of this message have been removed]
>>>
>>>
>>>
>>>
>>>Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>     
>>>
>
>
>
>
>Yahoo! Groups Links
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>

>



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