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 95 riviera no injector pulse

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woggy
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Name : Paul
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Location : Altoona, Florida (Somewhere in the ocala national forest)
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PostSubject: 95 riviera no injector pulse   Tue Apr 28, 2009 3:18 pm

Thanks for this wonderful site, very good reads. and alot of them!

I have no injector pulse on my 95 riviera 3.8 sc, The injector fuse is good and has power. I do have 12v at injectors when key is on. And injectors all read 14.2 ohms across injector terminals. Noid lights do nothing when cranking. Car has 35psi fuel pressure at the rail. Good spark (5.69 -5.73 ohms across each coil pack) and good compression also.
Any help troubleshooting this problem would be appreciated.
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deekster_caddy
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PostSubject: Re: 95 riviera no injector pulse   Tue Apr 28, 2009 5:20 pm

I would suspect a crank or cam sensor, but you can also try a used PCM first. I have heard of OBD-I computer failures... Not sure if the '95 Series 1 has both crank and cam sensors, I know the Series 2 engines do.
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Karma
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PostSubject: Re: 95 riviera no injector pulse   Wed Apr 29, 2009 12:07 am

dunno if its related at all or not, but your fuel pressure seems a bit low, the series one should have key on, ignition off, 40-48 psi. idle should be 41 psi min.. and around 42-44 psi when you pull the vacuum line off the fuel pressure regulator at idle.

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deekster_caddy
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Name : Derek
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PostSubject: Re: 95 riviera no injector pulse   Wed Apr 29, 2009 2:18 pm

35 PSI is more than enough to make the car run, though, but he's not able to measure with the engine running yet...
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BillBoost37
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PostSubject: Re: 95 riviera no injector pulse   Thu Apr 30, 2009 9:05 am

Series 1 motors did have both cam and crank sensors.

94/95 pcms were known to have a high failure rate when compared to other years.
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