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mano26
New User
Jul 26, 2008, 1:39 PM
Post #1 of 9
(1725 views)
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95 voyager 3.0 code 27
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My 1995 3.0 ply voyager with 186.000 miles runs and idles rough. also has raw gas smell at exhaust. I have checked the wiring to the injectors,pulled plennum and cleaned, replaced air filter, plugs, pcv valve,cleaned throttle body. I powered the injectors to check spray all seems well there.
Any ideas what to look for?
Thanks Mano.
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dave284
Enthusiast
Jul 26, 2008, 3:07 PM
Post #2 of 9
(1721 views)
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Re: 95 voyager 3.0 code 27
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Thats cause of an over-rich fuel mixture, theres a couple of things that need to be checked, the 02 sensor and the camshaft sensor....also the ECM could be at fault, the most easiest way to determine the cause is having a diagnostic scan done on the computer, the home method is no start...key on ...key off...key on...key off...key on then count the blinks of the check engine light....and it can be aggravating.
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autojoe
User
Jul 26, 2008, 3:08 PM
Post #3 of 9
(1718 views)
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Re: 95 voyager 3.0 code 27
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the code indicates that the resistance of the injector circuit is incorrect.Should begin with idenifying the injector connectors on the computer.With ignition switch off,disconnect the injector connector on the computer.Measure the resistance through the injector from computer connector.The resistance should be greater than 4 ohms but less than 20 ohms.Chances are that if the resistance is incorrect,it will be almost zero ohms or almost infinite ohms.If resistance through the injector circuit is incorrect,then check the resistance through the injector by itself.Like the resistance check through the entire circuit,the resistance through the injector should be between 4-20 ohms.If it is not,replace the injector.If it is,check the resistance through each of the wires connected between the computer and the injector.The resistance through these wires should be virtually zero.In fact,on most ohmmeters,it will read zero ohms.
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mano26
New User
Jul 27, 2008, 1:35 PM
Post #4 of 9
(1698 views)
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Re: 95 voyager 3.0 code 27
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Joe, I have checked the wiring from computer connector-good
I checked all injectors -good
It sounds like the ECM is bad
Would you agree?
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autojoe
User
Jul 27, 2008, 8:14 PM
Post #5 of 9
(1690 views)
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Re: 95 voyager 3.0 code 27
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if all wiring is good and no shorted injectors.....could be a bad computer.You could take a chance and replace but if that is not it...it would be a expensive choice unless you got a used one which I would not recommend.I always hook a labscope on injector circuit to look at injector waveform.you have 6 terminals at computer where computer grounds each injector.If all injectors and wiring are good then computer would have to be at fault.That is if all injectors are getting a 12volt continious feed from the asd relay.If there was a problem with the voltage feed to injecotrs then it may cause this also.Without proper testing equipment it is just guessing.Unless you take to a shop that is ase certified and pay for an hours diagnostic time or take a chance on pcm.
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autojoe
User
Jul 28, 2008, 8:46 AM
Post #6 of 9
(1683 views)
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Re: 95 voyager 3.0 code 27
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disconnect injector connector and measure resistance between injector 1 wire and the asd output wire which should be the dark green/orange wire at terminal........on the connector that goes to injectors.the resistance should be 10-15 ohms.then move the ohmmeter lead one to a good ground and other still on injector 1 terminal of connector....should be above 5 ohms.do this with all 6 injectors and see if all are good.if all good and above 10 volts to all injectors and wiring from injector connector to pcm and all connectors are good then has to be a faulty pcm.
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mano26
New User
Jul 28, 2008, 3:46 PM
Post #7 of 9
(1680 views)
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Re: 95 voyager 3.0 code 27
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Joe, I checked all wiring and injectors as you said, everything checks out good. I will replace the PCM.
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mano26
New User
Jul 29, 2008, 3:21 PM
Post #8 of 9
(1670 views)
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Re: 95 voyager 3.0 code 27
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Joe , I replaced the pcm and the van is running good again. Thanks for your help, I couldn't have done it without you.
Thanks again, Mano
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autojoe
User
Jul 30, 2008, 10:19 AM
Post #9 of 9
(1661 views)
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Re: 95 voyager 3.0 code 27
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that is good.glad I could help.
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