1992 Astro hard to start & restarting problems

1992 Astro hard to start & restarting problems

Postby corbinky [OP] » April 12th 2012, 1:07pm

I have been having this starting problem with my 1992 Astro van for over a year. I have changed the fuel pump, dist cap, ignition module, coil and plugs. None of this has helped at all.
When it is cold(no matter the temp outside)it takes about 16 secs to start or to the count of 15-16. It runs perfect when started. I have driven it as far as 100 mi after starting. The problem is, if you shut it off, it will crank until the battery is dead and will not start or you can let it sit for an hour or so and it will start all over the same way. I have had this van for almost ten years and would like to keep it that many more, but it is trying my patience. 220,000 miles The plugs had about 25,000 when I just changed them and almost looked as good as the ones I just put in. Please help!!
Have thought maybe the fuel regulator, but I am so tired of changing parts.
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Re: 1992 Astro hard to start & restarting problems

Postby Lumpy » April 12th 2012, 10:19pm

Is your van Throttle Body Injection or octapus?


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Re: 1992 Astro hard to start & restarting problems

Postby corbinky [OP] » April 18th 2012, 2:17pm

Old type. W series. Throttle body.
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Re: 1992 Astro hard to start & restarting problems

Postby love safari » April 18th 2012, 4:26pm

you may need to check your injectors and O wrings .(i am almost sure)
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Re: 1992 Astro hard to start & restarting problems

Postby garrylording » April 19th 2012, 11:24pm

I have a 97 4.3L W engine in my GMC van. I am having similiar problem starts fine when cold Hot engine just cranks unless I floor the pedal then will start. I suggest you try the same . I got mine to set a code p0125 which is a ECT fault (engine coolant temp) closed loop. This causes a rich flooded condition when engine hot during starting and when running causes engine stumble or hesitation from idle. You have the old ob1 computer which would give a code 15. The sensor is only $25 and you can test it with a multimeter.
Might be worth looking at before getting into more expensive repairs when unsure. Garry
ps Will let you know if it cures my problem.
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Re: 1992 Astro hard to start & restarting problems

Postby Chevymankevin » April 20th 2012, 12:13am

X2 Coolant temp sensor can cause that same issue. Just make sure you replace the right sensor. Not the sensor that controls your gauge temp.
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Re: 1992 Astro hard to start & restarting problems

Postby paintdrying » April 20th 2012, 12:24am

On that system I just replace the coolant temperature sensor. It controls so many things. Did you replace the fuel filter, and did you check the presure.

Also
check the injectors spray pattern. Those injectors are inexpensive, maybe replace those as well.

I know you feel like your just throwing money at your van, but if you plan on ten more years, it is not wasted money...
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Re: 1992 Astro hard to start & restarting problems

Postby corbinky [OP] » April 20th 2012, 4:34pm

I have read before, that it might be the coolant temperature sensor. I have replaced the fuel filter and just replaced the rotor button also(it looked original but didn't help).
Would you happen to know where that temperature sensor is located?
Thanks,
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Re: 1992 Astro hard to start & restarting problems

Postby garrylording » April 20th 2012, 6:13pm

The temp sensor for engine computor control (not temp gauge) has 2 wires and is located in front of thermostat coolant housing where the large top rad hose enters on frt of engine along with heater hose. You have to lift up hoses as it's hard to see. You will need a deep socket to replace sensor. It's in a tough spot to get out. garry
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Re: 1992 Astro hard to start & restarting problems

Postby paintdrying » April 20th 2012, 9:09pm

The "general" rule is when it takes a while to crank and start, then restarts right away, your fuel system is fine. Not sure how that transfers to your problem.
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Re: 1992 Astro hard to start & restarting problems

Postby garrylording » April 22nd 2012, 6:36am

garrylording wrote:I have a 97 4.3L W engine in my GMC van. I am having similiar problem starts fine when cold Hot engine just cranks unless I floor the pedal then will start. I suggest you try the same . I got mine to set a code p0125 which is a ECT fault (engine coolant temp) closed loop. This causes a rich flooded condition when engine hot during starting and when running causes engine stumble or hesitation from idle. You have the old ob1 computer which would give a code 15. The sensor is only $25 and you can test it with a multimeter.
Might be worth looking at before getting into more expensive repairs when unsure. Garry
ps Will let you know if it cures my problem.


Good news I was right it was the ect sensor the van is running like a top .I would think that even if you don't get a code I think this sensor is overlooked reading this site I.m new too this site and have done some reading of problems. Here's my advice for what it's worth( plus some from a Gm maintenance troubleshooter)
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Re: 1992 Astro hard to start & restarting problems

Postby garrylording » April 22nd 2012, 7:14am

I got kicked out some how my pevious reply 1. alway's look for the simple fixes as man always think's the worst. 2 Pm does pay in some cases smell your transmission oil burnt smell replace 3. reading I see many problems with fuel pumps. Main cause of faillure dirty gas filter not being replaced every 30k under body( not conveniant) the pump will pump up to 150psi plus(tring to pump through dirty filter) that will cause overheating and failure. 4 I have a 4.3 l v6 good for 5-6 k easy if you look after. It is GM # 1 boat engine for mercruser which were made to be driven full throttle. These engines are much more simplified no computer no fuel injection.My van has 255k and I use sythetic oil change every 25k hwy only have problem with distributer and cap which i replace every 6 month but maybe it.s been the ECT from day 1 ? GOOD TRUCKING. Garry
Im open to disscussion about this one. I think they should start a PM topic pros and con,s as you can spend a pile of money replacing unnecessary parts and fluids etc. eg tranny flush I'm sure people have some dandy stories some good and bad.
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Re: 1992 Astro hard to start & restarting problems

Postby corbinky [OP] » April 22nd 2012, 11:39pm

From everything that has been posted(which I REALLY appreciate), I think it must be the engine coolant temp sensor. I am going to try this next. I am wondering if the ECT could be bypassed, to see if it still acts the same.
However, I have read that it could be something as simple as the EGR valve. Even though I have spent quite a bit so far, I tend to believe it has to be a simple cure. Way back when I was learning about computers, I learned many times it just took a reboot.
When I finally get to the end or cure of this situation, I am sure that it will be a somewhat simple issue. Thanks again, esp Garry.
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Re: 1992 Astro hard to start & restarting problems

Postby garrylording » April 26th 2012, 5:51am

Glad to help but be carefull EGR valve not that simple .they are all a bit different and hookup to exhaust in different ways and there not cheap. I wouldn,t jupper ect it might effect your computor but you can test circuit with muiltimeter.
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