Problems with Astro van 1991 wont keep running

Problems with Astro van 1991 wont keep running

Postby Astro1991noob [OP] » April 14th 2020, 7:20pm

Hello i have a problem with my 1991 Astro Van it cranks and starts but wont keep running unless i constantly pump the throttle. If i squirt starting fluid into the manifold it keeps running. I can see fuel being distributed from the TBI injectors. I dont get any check engine ligth or anything but if i pull off the vacuum hose leading from the back of the intake manifold to the MAP sensor it keeps running but poorly and i get the check engine ligth in the dash. The Van was running fine but has been sitting for a couple of years and now the problems started any ideas what could be the problem?
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Astro1991noob
Fueling (Empty tank)
Fueling (Empty tank)
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Gender: Male
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Van Model Year: 1991
Van Make/Model: Chevrolet Astro
Extra Info: 4.3L V6 RWD

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Re: Problems with Astro van 1991 wont keep running

Postby akforceten » April 14th 2020, 7:54pm

Bad gas? plugged fuel filter? maybe need a tune up
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Re: Problems with Astro van 1991 wont keep running

Postby augidog » April 14th 2020, 8:44pm

akforceten wrote:Bad gas? plugged fuel filter? maybe need a tune up
Mine sat for a year with a 3rd tank of gas. I topped it off with ethanol-free 92 octane, added Heet and Lucas Injector Cleaner, and it started running like I'd lit its tail on fire.
Scanned original Chevrolet-GMC Dealer "Product Information Guides."
Detailed Options w/RPO's. Learn all about your Astro/Safari's first build.
https://www.astrosafari.com/viewtopic.php?f=27&t=142268
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Van Model Year: 1995
Van Make/Model: Chevrolet Astro
Extra Info: AWD High-Top


 
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