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Fuel injector not working?

Tiny
MATTNCATH SORIMA NORPEL
  • MEMBER
  • 1993 CHEVROLET ASTRO
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 47 MILES
Deployed in Asia, got this van.
4.3 CPI to drive here. Chevrolet parts are hard to find here then if you find one you get the normal foreigner sure charges. Asians buy Asian products it seems, not American. Van had no fuel so changed pump and still no fuel at rail. Jumped relay and got fuel to rail but now only intermittent injection of fuel from CPI. Van had previously a new fuel pressure regulator and all seemed fine under plenum. To further complicate, the elderly German man I bought van from finally tells me van has had intermittent fuel issues for years. No codes, only normal twelve code. Does ECM or text ignition module tell the injection to pulse?
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Monday, November 20th, 2017 AT 6:50 PM

10 Replies

Tiny
RENEE L
  • ADMIN
  • 1,257 POSTS
Hi MATTNCATH SORIMA NORPEL,

All of us at 2CarPros want to thank you for your service. Please know that we truly appreciate you and all of our military. Happy Thanksgiving! I have sent your question to an expert who will be here shortly to answer your question.
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Thursday, November 23rd, 2017 AT 12:46 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,798 POSTS
Hello,

Yes, these engine have a "spider" injector that goes bad all the time which sounds like what you need.

Here is the part:

https://www.amazon.com/ACDelco-217-1431-Original-Equipment-Multi-Port/dp/B000C9KKT0/ref=sr_1_16?ie=UTF8&qid=1511470862&sr=8-16&keywords=1993+CHEVROLET+ASTRO+injector

They make cheaper one, but I do not recommend them.

You will need to remove the upper intake plenum to replace the injector.

Below is how you change the part out.

Please let us know what happens. Thank you for your service. :)

Cheers, Ken
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+1
Thursday, November 23rd, 2017 AT 1:05 PM
Tiny
WHOLELOTTA
  • MEMBER
  • 1 POST
  • 1995 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
Engine Mechanical problem
1995 Chevy Astro 6 cyl Two Wheel Drive Automatic 175000 miles

would you please explain what it entails to change (replace) the spider in the fuel injection system. I haven't even gotten a repair manual on this vehicle yet. I'm capable of doing basic repairs. Where is it located and what is the procedure to replace? Approximate cost of part? App. Time it will take to do repair? Degree of difficulty?
Should this part be replaced at a certain mileage for preventive maintenance?
Thanks a whole lot!
G
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Friday, November 24th, 2017 AT 5:13 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,723 POSTS
Hi wholelotta. Welcome to the forum. What you're referring to is a series of tubes leading to the ports in the intake manifold from the injector. I don't think they were used on the V-6 engines. The last Astro I worked on had a pair of injectors inside the throttle body, but that WAS an older model.

Caradiodoc
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Friday, November 24th, 2017 AT 5:13 PM (Merged)
Tiny
BUBBACATS
  • MEMBER
  • 1 POST
  • 1991 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
Engine Mechanical problem
1991 Chevy Astro 6 cyl Two Wheel Drive Automatic 175000 miles

will run untill brakes are pressed then dies will not start back up for about 2-3 hrs. No fuel comes out of injectors. Gets fuel to pressure regulator but nothing is comming out of injectors. Have replaced map sensor. Pressure regulator, idle sensor e.G.R. This has a hydrolic brake system.
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Friday, November 24th, 2017 AT 5:13 PM (Merged)
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
I hate to say this but the fuel injectors are energized by the computer. But first have them noid light tested to be sure they are getting power. Also, check your brake fluid to see if you are losing fluid and get back to me
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Friday, November 24th, 2017 AT 5:13 PM (Merged)
Tiny
VORTEC2
  • MEMBER
  • 1 POST
  • 1998 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Engine Performance problem
1998 Chevy Astro 6 cyl Two Wheel Drive Automatic 100000 miles

took off upper intake manifold and removed spider injection system. Noticed a shining nipple on the side of the fuel regulator that was not attached to anything in my vehicle. The manual states it goes to a vacuum hose. Where is this hose located and what does it come off and why do I need it?

I am replacing #4 injector and poppet assembly tube. Want to put back together and don't know what to do with this.

Thank you, Dennis
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Friday, November 24th, 2017 AT 5:13 PM (Merged)
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
If it is inside of the sealed intake, there is vacuum inside that chamber. There would be no need for a hose to connect to it. I would assume it is the fuel pressure regulator, and it would get its vacuum signal from that chamber.
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Friday, November 24th, 2017 AT 5:13 PM (Merged)
Tiny
RAYBUSS
  • MEMBER
  • 1 POST
  • 1989 CHEVROLET ASTRO
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 174,000 MILES
TBI has no fuel spray. Has ground + voltage. Has afull tune up, new fuel pump, filter, screen filter. Tred New PCM had no change. Rebuilt The TBI. No fuel blockage and pressure is good. What I would like to know is, What Is the PRIMARY trigger for the injectors. What tell the CPM to fire the injectors? The dealer was not much $300 later, it's this old OBD1 no one can diagnose.
Thank for any help you can provide. Ray Buss
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Friday, November 24th, 2017 AT 5:13 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes first cross A&B with a paper clip turn key on and count flashes of engine light. Have ignition module checked if not working right no injection. Also can be a prom issue inside computer which are no longer available. Codes listed under how to repair on our site for OBD1. Make sure connections are good on tbi unit
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Friday, November 24th, 2017 AT 5:13 PM (Merged)

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