Fuel pressure is lower on a fuel injection car than with carburetor I read once. With my 93 Sonoma, past problems were most often with sensors in the fuel injection and smog system. I have in the past replaced the fuel pump in the tank (did so by raising truck bed to gain access), but first better to invest in a code checker, auto suppliers have them for around $25. Sensors regulate fuel, it could be throttle position sensor, or temperature sensor (when cold it tells computer to use more fuel for same rpm). Under the dash is a socket, you plug in the checker, it begins flashing a code with a light in the instrument area. There are 6 to 8 sensors. Look up in a repair manual of that car, and it will tell you how it is done and show the code meanings for you to localize what the problem is before spending too much.

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On 3/1/2024 12:00 pm, helper wrote:
> Fuel pressure is lower on a fuel injection car than with carburetor I

This first sentence is total bullshit so ...

<snip the rest>

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

When engine quits and won't start, try putting a little gas in throttle body and put air filter back on (to avoid fire), then try starting to see if it runs for a few seconds. That might be good test to know it isn't getting fuel during those situations. Sometimes hard to know if fuel or electrical is problem.
I think my 93 sonoma was acting up, cutting out at times a few years ago, recalling as you mentioned fuel pressure. Someone told me that fuel pumps go out gradually, used to be easy to replace too. The in-tank variety can be hard to get to. A van might have a cover on the van floor to access the top of the tank, and even allow you to remove the pump assembly from the top of tank--a ring that turns unlocks some tabs and then pump assembly lifts out, that part fairly easy. New pump fixed my cutting out, cost about $70 online.
When stumped, I go to a repair shop and get estimate how much to diagnose problem. They used to do that for around $100. Then fix it yourself from their advice. They have better equipment and are used to solving mysteries.

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On 1/3/2024 6:59 PM, Xeno wrote:
> On 3/1/2024 12:00 pm, helper wrote:
>> Fuel pressure is lower on a fuel injection car than with carburetor I
>
> This first sentence is total bullshit so ...
>
> <snip the rest>
>

Another point - I think '95 was the last year for OBDC1 ... And you
read the codes by shorting 2 pins in the plug then counting how many
times the check engine light flashes .
--
Snag
"They may take our lives but
they'll never take our freedom."
William Wallace

helper wrote:
> When engine quits and won't start, try putting a little gas in throttle
> body and put air filter back on (to avoid fire), then try starting to
> see if it runs for a few seconds.  That might be good test to know it
> isn't getting fuel during those situations.  Sometimes hard to know if
> fuel or electrical is problem.
>   I think my 93 sonoma was acting up, cutting out at times a few years
> ago, recalling as you mentioned fuel pressure. Someone told me that fuel
> pumps go out gradually, used to be easy to replace too.  The in-tank
> variety can be hard to get to.  A van might have a cover on the van
> floor to access the top of the tank, and even allow you to remove the
> pump assembly from the top of tank--a ring that turns unlocks some tabs
> and then pump assembly lifts out, that part fairly easy.  New pump fixed
> my cutting out, cost about $70 online.     When stumped, I go to a
> repair shop and get estimate how much to diagnose problem.  They used to
> do that for around $100.  Then fix it yourself from their advice.  They
> have better equipment and are used to solving mysteries.

The original post is 19 years old. It's unlikely that the OP is still
driving his 30 year old Astro. Metal fatigue would have broken it in
half about 10 years ago.

On 4/19/2024 12:08 PM, Paul in Houston TX wrote:
> helper wrote:
>> When engine quits and won't start, try putting a little
>> gas in throttle body and put air filter back on (to avoid
>> fire), then try starting to see if it runs for a few
>> seconds.  That might be good test to know it isn't getting
>> fuel during those situations.  Sometimes hard to know if
>> fuel or electrical is problem.
>>    I think my 93 sonoma was acting up, cutting out at
>> times a few years ago, recalling as you mentioned fuel
>> pressure. Someone told me that fuel pumps go out
>> gradually, used to be easy to replace too.  The in-tank
>> variety can be hard to get to.  A van might have a cover
>> on the van floor to access the top of the tank, and even
>> allow you to remove the pump assembly from the top of
>> tank--a ring that turns unlocks some tabs and then pump
>> assembly lifts out, that part fairly easy.  New pump fixed
>> my cutting out, cost about $70 online.     When stumped, I
>> go to a repair shop and get estimate how much to diagnose
>> problem.  They used to do that for around $100.  Then fix
>> it yourself from their advice.  They have better equipment
>> and are used to solving mysteries.
>
> The original post is 19 years old.  It's unlikely that the
> OP is still driving his 30 year old Astro.  Metal fatigue
> would have broken it in half about 10 years ago.

Yep and prices reflect that degradation
https://buysellsearch.com/vehicles/cars/mk-chevrolet/ml-astro/bd-van/yr-1995
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971

That's the same as what code checker does with odb 1 system, yr 93 or older. Don't think fuel pressure was 65 lbs. On my 93 Sonoma similar problem was throttle position sensor. That tells computer how much gas goes to injectors. it was sporadic as I recall. And code checking doesn't work perfect but pretty good.

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