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Otten33

Cadillac Deville crank but no start

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So i think I should pull fuel pump back out and check connections in pump and connector.  I will install old pump and see if I have pressure.  Eliminate if it's the pump or not.  I wasn't aware that relay had to be plugged in any certain way.  Which orientation should it be in?  Fuse jumper?

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2 hours ago, Otten33 said:

So i think I should pull fuel pump back out and check connections in pump and connector.  I will install old pump and see if I have pressure.  Eliminate if it's the pump or not.  I wasn't aware that relay had to be plugged in any certain way.  Which orientation should it be in?  Fuse jumper?

That could be why you got ZERO psi with the new pump, you have the relay in wrong.  

I don't know what you mean by 'fuse jumper'


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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How do you use a fuse jumper.  I will turn relay around and see if I get pressure back.  Let you know in a bit.

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Flipping the relay around did nothing.  Still no pressure.  Cam sensor came in and was looking around for it but can't seem to find it.  I'll double check your picture bodybyfisher.

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On 4/20/2018 at 12:01 PM, Otten33 said:

Is this picture from the bottom side of passenger side of engine?

Must be at the back of the engine between the engine and firewall.

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A fused jumper is just a jumper wire with a fuse in it. So we are not burning up new problems...

 

I would leave the pump in the tank......remove the fuel pump relay.....install a fused jumper across the relay......see if you now get voltage at the fuel pump harness plug out in the trunk. 

If you now have voltage at the pump connector.....plug in the connector.....pump should run. 

 

Unrelated....I also attached pic of the cam sensor. Rear cylinder bank....near passenger side. And one of the fuse block.....fuel pump relay (#39) and 20a fuel pump fuse (#1) hopefully showing the correct orientation of relay (not verified) with "OMRON' on the outside corner of fuse block. 

 

fusedjumper.jpg

 

camsensor2.JPG

devillefuseblock2.jpg

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The CAM sensor is in the same place as my prior picture.  Outboard on the rear head passenger side.  There is not a lot of room 


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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That's where I was looking but didn't see anything.. I'll go back out and be more thorough I guess.  Thanks for the orientation picture Logan.

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Curious.....does the serpentine belt look fairly new? 

I've had a couple of serpentine belts fail in a new way....so much so there is one brand I won't use. They let go one of the outer 'strings' on the belt......the long broken belt string whips around knocking out sensors and wiring along the way. This can go on for a thousands of miles before being noticed.

Maybe the cam sensor fell victim to this?  Maybe why he cannot see the sensor? It got wiped out by a bad belt? 

Belt picture is from Google....not mine. The ones I've seen have only been one of the outer strings failed. 

Northstar pic shows the cam sensor would be directly in-line for damage from a failing belt stringer. It also shows the cam sensor moved closer to the intake on the latter engines. 

 

shredded gatorback.jpg

 

northstar-engine-information-800x800.jpg

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@Otten33. What is the status anything new?


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I haven't had hardly anytime to work on this.  I did find the Cam sensor.  It was completely covered in oil.  Only found it after dousing area in brake clean.  I haven't replaced it yet.  It looks like a hell of a fit.  I should be able to squeeze a wrench in there and take off the sensor.  Hopefully once off I can pull towards me to disconnect the connector.  I tried finding a fuse jumper locally but NAPA doesn't seem to have one.  I will check autozone or oreilleys tonight.  If not I will order one from Amazon.    

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Ok guys brief update.  New cam sensor installed.  Pretty easy once the expansion coolant tank is moved out of the way.  Found fuse jumper.  Have yet to try it though.  Little unsure what to do with it though.   From picture it looks like I'm plugging in at pin 87a and 30.  What size fuse should I use?  20 amp?  Sorry about the delay.  Do lawn care on the side and have been crazy busy lately.  Thanks for all the advice.

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For a jumper I usually use nothing higher than a 10 amp


GM FAN FOREVER

Nice, clean, luxury= fine automobile

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This is helpful it is 30

 

 


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Ok tried fuse jumper.. car started a few times but died quickly, within seconds.  Checked fuel pressure.  It was at zero.  Put test light on connectors at fuel pump.  I had power going to both connectors.  I reinstalled old fuel pump at pressure shot up to 38 PSI just like before.  Still wouldn't start.  Just cranked.  Sprayed ether in the intake and still it would start.  Last time I had checked spark I was getting blue spark but I only checked on the front bank.  Back bank looked like a pain in the but to get too.  The new fuel pump was brand new AC Delco.  Seems to be defective.  Also wasn't sure on orientation of fuel pump relay so I plugged in to the left side one time and then into right side of relay ports.  Right side blew fuse immediately.  Whatever that means.

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