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95 Chevy Van No code or light, Vehical not responding, only ...

Sent to Car Experts February 21 09:07 AM

95 Chevy Van No code or light, Vehical not responding, only getting 8.2 volts dc to new feul pump, new ECMB module, new filter, 11.8 v to ECMB, 11.8 to feul injectors, down to 8.9 v when ignition is turning over. No feul, Is there something I'm missing, how do I check the wiring?

 

Optional Information:
1995 Chevrolet G-30

Already Tried:
New feul pump, new filter, new ECMB Module, checked and checked wiring, still can't find the problem The vehicle is not getting feul.

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Info Request
February 21 11:02 AM (1 hour and 54 minutes and 47 seconds later)
         

Hello and welcome to Just answer.com, Super mechanic here. I just have a couple of questions about your van.

Do you know what engine it has in it?

Do you have good connections at the battery terminals? (smaller wires)

Will it run fo ra second or so with a shot of ether?

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Super mechanic -- Auto Mechanic -- 98% Positive Feedback on 921 Car Accepts
ASE master, 30 years
Reply
February 21 1:47 PM (2 hours and 45 minutes and 11 seconds later)
         
It has the 5.7 liter v-8

Appears to have good connections at the battery, The smaller wires at the firewall terminals are reading 12.8 v also.

Yes it runs on ether fine.
Customer (name blocked for privacy)
Answer
February 21 1:56 PM (8 minutes and 13 seconds later)
         
ACCEPTEDCheck Mark

OK, there might be a bad fuel pump relay there. Or the connection at the oil pressure switch. You may want to try jumping the relay and or ooil pressure switch to see if that will give you the proper voltage to the fuel pump. Here is a diagram of the system.

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Super mechanic -- Auto Mechanic -- 98% Positive Feedback on 921 Car Accepts
ASE master, 30 years
Reply
February 21 3:06 PM (1 hour and 10 minutes and 50 seconds later)
         
Jumping the feul pump relay does make the pump un and plenty of feul but the throttle body injectors are'nt giving me feul now.
Customer (name blocked for privacy)
Info Request
February 21 3:12 PM (5 minutes and 12 seconds later)
         

Sounds like a security problem. Are there any security lights on?

Do the injectors have power and just not grounding?

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Super mechanic -- Auto Mechanic -- 98% Positive Feedback on 921 Car Accepts
ASE master, 30 years
Reply
February 21 3:24 PM (12 minutes and 42 seconds later)
         
Not aware of any security system, no lights. I get 12.2 v from injector to alternate ground, 11.8 v w/ both leads on injector and 8.9 with the starter engaged
Customer (name blocked for privacy)
Info Request
February 21 3:28 PM (3 minutes and 15 seconds later)
         
Do the injectors have a pulse to ground when you crank the engine?
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Super mechanic -- Auto Mechanic -- 98% Positive Feedback on 921 Car Accepts
ASE master, 30 years
Reply
February 21 3:39 PM (11 minutes and 8 seconds later)
         
My digital tester doesnt react quick enough, but the voltage does fluctuate just not measurably
Customer (name blocked for privacy)
Info Request
February 21 3:47 PM (8 minutes and 40 seconds later)
         
You can normally use a 12v test light to see if it will blink. Or a noide light if you happen to have one. If the fuel pressure is good now and there is power to the injectors, when they are grounded they should spray fuel. Like a on off switch.
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Super mechanic -- Auto Mechanic -- 98% Positive Feedback on 921 Car Accepts
ASE master, 30 years
Reply
February 21 4:07 PM (19 minutes and 37 seconds later)
         
All this started just after a heavy freeze,If I find that I do have a pulse at the the injectors could they just be plugged?
Customer (name blocked for privacy)
Info Request
February 21 4:15 PM (8 minutes and 23 seconds later)
         

It's possible. They have a fine micro screen in them. If there were any ice it would clog real easy.

If you turn the key on and temporarily ground the bark blue or green wire you should see the injector spray fuel.

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Super mechanic -- Auto Mechanic -- 98% Positive Feedback on 921 Car Accepts
ASE master, 30 years
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