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post #1 of 15 Old 09-04-2013, 12:56 PM Thread Starter
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86 GLH No Power To Injectors

1986 Dodge Omni GLH:
Problem no power to injectors
pressure 50-55
changed both power/logic Modules
anything else to check? i got few people helpin me out trying knock off possibilities 1 by 1.
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post #2 of 15 Old 09-04-2013, 01:23 PM
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Re: 86 GLH No Power To Injectors

Any fault codes?
Did you do any repairs immediately before this happened?
Are all your connectors pushed tightly together and grounds in place?

Check the connections under the battery, the main fuel wiring harness connector over the fuel rail, the fuel rail to firewall braided ground strap, ground strap over the passenger engine mount, the ground (brown and yellow I believe) wire that attaches to the top of the transmission that is next to the two wires for the reverse light switch.
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post #3 of 15 Old 09-04-2013, 01:45 PM Thread Starter
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Re: 86 GLH No Power To Injectors

its @ a shop getting fixed, for longest time was a voltage problem here was a wire goin to alternator now this.

Quote:
Originally Posted by ILIKESHELBYS View Post
Any fault codes?
Did you do any repairs immediately before this happened?
Are all your connectors pushed tightly together and grounds in place?

Check the connections under the battery, the main fuel wiring harness connector over the fuel rail, the fuel rail to firewall braided ground strap, ground strap over the passenger engine mount, the ground (brown and yellow I believe) wire that attaches to the top of the transmission that is next to the two wires for the reverse light switch.
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post #4 of 15 Old 09-04-2013, 06:51 PM
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Re: 86 GLH No Power To Injectors

Power to the injectors is from the ASD relay which on an 86 is integral to the PM.
The ASD also powers the + coil and fuel pump.
The ASD will not be actuated cranking until the controller see's a crank signal from the HEP.

If you are missing power to ALL components you need to manually actuate the ASD and see if power is present.
If it is you have a HEP CIRCUIT problem.
If the ASD will not manually actuate you need to check ALL power feeds and grounds into the PM, LM and from PM to LM.
If you are only missing power to the injectors then you need to check continuity to locate the open from the PM to injector connector, check continuity on both sides of the connector.
The ASD output is from Cavity #6 of the PM 10 pin connector,DG/BK wire.

MANUALLY ACTUATE THE ASD
1)Locate the underhood diagnostics connector
2)With the key on/engine off ground the DB/YL wire in the diagnostic connector.










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post #5 of 15 Old 09-04-2013, 08:09 PM
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Re: 86 GLH No Power To Injectors

i was going to say check the ground to the intake manifold but NAJ trumps all
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post #6 of 15 Old 09-06-2013, 10:18 AM Thread Starter
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Re: 86 GLH No Power To Injectors

update:
power goin in cpu none come back out ideas?

Quote:
Originally Posted by NAJ View Post
Power to the injectors is from the ASD relay which on an 86 is integral to the PM.
The ASD also powers the + coil and fuel pump.
The ASD will not be actuated cranking until the controller see's a crank signal from the HEP.

If you are missing power to ALL components you need to manually actuate the ASD and see if power is present.
If it is you have a HEP CIRCUIT problem.
If the ASD will not manually actuate you need to check ALL power feeds and grounds into the PM, LM and from PM to LM.
If you are only missing power to the injectors then you need to check continuity to locate the open from the PM to injector connector, check continuity on both sides of the connector.
The ASD output is from Cavity #6 of the PM 10 pin connector,DG/BK wire.

MANUALLY ACTUATE THE ASD
1)Locate the underhood diagnostics connector
2)With the key on/engine off ground the DB/YL wire in the diagnostic connector.









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post #7 of 15 Old 09-06-2013, 07:01 PM
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Re: 86 GLH No Power To Injectors

I am assuming you manually actuated the ASD relay and there was no power present on the PM 10 Pin Connector Cavity #6.
(I assumed you backprobed the connector and verified your backprobe pin was making good contact with the terminal.)
If this is correct...continue

Yes or No...
All of the Power Feeds were verified to have power present at the controller connector.
1)PM 10 Pin Connector
Cavity #'s 2, 3, 4
2)LM Blue Connector
Cavity # 2
3)LM Red Connector
Cavity #'s 7, 8

All controller Grounds were verified to have continuity to ground?
1)PM 10 Pin Connector
Cavity #'s 9, 10
2)LM Blue Connector
Cavity #'s 7, 8

If all of that was verified OK...
Were all terminals checked fordamage/corrosion/spread terminal/terminal push out?

If all terminals checked OK.

Verify continuity on the ASD relay ground control wire, PM 12 Pin Cavity #5 to LM Red Cavity #17.
If the circuit has continuity(less than 5 ohms) backprobe the LM Red Cavity #17(DB/YL wire) and connect to a good ground then turn the key on.
The ASD should be actuated.
Is power now present at the ASD output at PM 10 Cavity #6?
If YES check the terminal at the LM Cavity #17 for damage/corrosion/spread/push out.
If the terminal is ok replace the LM.
If power was not present on the ASD output replace the PM.

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post #8 of 15 Old 09-06-2013, 07:59 PM
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Re: 86 GLH No Power To Injectors

BTW, Just an after thought.
I assume you did not have power to the + coil or fuel pump as well as the injectors which was what you originally posted...???
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post #9 of 15 Old 05-19-2019, 05:32 PM
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Re: 86 GLH No Power To Injectors

Did you ever find the issue?
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post #10 of 15 Old 05-21-2019, 09:39 AM
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Re: 86 GLH No Power To Injectors

6 year old thread, the last time the OP was on the site was 1 1/2 years ago.
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post #11 of 15 Old 05-22-2019, 08:59 PM
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Re: 86 GLH No Power To Injectors

Thanks, seems I'm having the same issue, went through everything you posted. Wish people would reply more when they find a solution.
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post #12 of 15 Old 05-23-2019, 07:39 AM
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Re: 86 GLH No Power To Injectors

What are we working on?

How did you verify there was no power to the injectors?

Is there power to the fuel pump and + coil with the engine cranking?
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post #13 of 15 Old 05-25-2019, 02:47 PM
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Re: 86 GLH No Power To Injectors

Its an 85 GLH , did a motor swap back to a 2.2. Everything was ready to go blew a fusible link to the ignition, changed that went over all the wiring including the grounds. Have a meter and test light there is power going to all including the injectors, but they are not firing, thinking the power module isn't good, I spoke to Mike at forward motion, he was thinking the same, found one its coming next week if that isn't it might just change everything to a newer system.
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post #14 of 15 Old 05-26-2019, 07:46 AM
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Re: 86 GLH No Power To Injectors

I assume you checked for stored fault codes.

FYI...
If the TPS is reading over 2.50 volts with the key on/engine cranking the engine controller assumes the engine is flooded, goes into "clear flood mode" and it will not pulse the injectors.
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post #15 of 15 Old 05-26-2019, 08:03 AM
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Re: 86 GLH No Power To Injectors

Also forgot to mention that the LM does the actual pulsing of the injectors.
The circuit runs from LM - PM - Injectors, so any open/shorted wire(s) anywhere in the circuit will create your issue.
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