No spark, no fuel, no start after heads reinstalled

Tiny
CA7922303
  • MEMBER
  • 2001 HYUNDAI SANTA FE
  • 2.7L
  • V6
  • 2WD
  • 300,000 MILES
Was running okay. Very slow water leak. Took heads to machine shop pressure tested good and had surfaced. Installed heads with new gaskets, bolts. Compression is 160 on all cylinders. No spark, no fuel, no start. Fuel pump has fuel at injector rail. Injectors read 14 ohms, injector plug reads 24 volts. Camshaft sensor reads 10 volts. Timing marks are correct on crank and cams. Any ideas would be greatly appreciated.
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Tuesday, December 24th, 2019 AT 10:26 AM

18 Replies

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

This sounds like you could have a problem with your vehicle's Crankshaft Position Sensor. It is responsible for sending your vehicle's Power-train Control Module [PCM], or "computer", with a signal telling it where the engine is in it's 4 stroke cycle so it can synchronize and fire the fuel injectors and spark plugs. Here is a generic guide on how to replace a crankshaft sensor in a vehicle down below:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

In the diagrams down below I have included a picture and diagram of the CKP in your vehicle. Please go through this guide and get back to us with how everything turns out.

Thanks,
Alex
2CarPros
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Wednesday, December 25th, 2019 AT 1:54 AM
Tiny
CA7922303
  • MEMBER
Tested crank sensor. Shows 0.3 ohms, sensor plug shows 10.2 volts.
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Thursday, December 26th, 2019 AT 2:12 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello,

Could you take a voltage reading across your battery terminals for us Please get back to us with what you find out and we can go from there.

Thanks,
Alex
2CarPros
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Thursday, December 26th, 2019 AT 6:54 PM
Tiny
CA7922303
  • MEMBER
Battery is reading 12.38 volts.
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Thursday, December 26th, 2019 AT 8:33 PM
Tiny
CA7922303
  • MEMBER
Is 0.3 ohms a good crank sensor? Is 10.2 volts at plug correct voltage? Thanks for your help.
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Thursday, December 26th, 2019 AT 8:35 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

Okay, your vehicle's battery is good. In the diagrams down below I have included all of the electrical specs for the sensors in your vehicle as well as the diagnostic troubleshooting guide for the CKP for your vehicle. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Thursday, December 26th, 2019 AT 9:32 PM
Tiny
CA7922303
  • MEMBER
Can you tell me why a known good scanner will continue to read 'Link Error' when I hook it up to this Hyundai 2.7? Also, tachometer dies not work when cranking this vehicle? What do these two things indicate?
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Friday, December 27th, 2019 AT 5:15 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello,

There is an issue of an open or unwanted resistance in the Controller Area Network[CAN], or the wires that go to the Data Link Connector[DLC]. In the diagrams down below I have include both the Original Equipment Manufacturer[OEM] wiring diagrams and the wiring diagram for your vehicle's DLC. I have also included guides for finding opens, and unwanted resistance in an automotive electrical circuit by the way of Voltage Drop, the preferred method for finding unwanted resistance. I have also included a generic pinout diagram for your vehicle's DLC. All DLC's are universal and required by law to be exactly the same, so a pinout chart for one vehicle will be the same as any other. You will need to use a Digital Multi-meter [DMM] to go through these guides, so here is a link below explaining how to use one:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go through these guides and report back with what you find. Happy Holidays.

Thanks,
Alex
2CarPros
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Friday, December 27th, 2019 AT 9:59 PM
Tiny
CA7922303
  • MEMBER
Also, 10 amp fuse in engine bay fuse block is blown. Got a reading of 25.2 volts on the 40 amp fuse location?
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Saturday, December 28th, 2019 AT 5:50 AM
Tiny
SCGRANTURISMO
  • EXPERT
Hello,

What fuse is blown in the underhood fuse box? Is there any way you could take a picture of it and upload it here for us?

Thanks,
Alex
2CarPros
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Saturday, December 28th, 2019 AT 5:46 PM
Tiny
CA7922303
  • MEMBER
It's the only 10 amp fuse in the fuse box. I'm out of town today. Will take a picture of it tomorrow and send. Let me add that after putting a good fuse in I connected scanner and turned key to acc and once again got 'Link Error' message. Checked fuse and it had blown again. Appears that turning key to acc is blowing fuse?
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Saturday, December 28th, 2019 AT 6:51 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

Fuses blow because there is a short to ground in the circuit[s] that the fuse is protecting. This happens because of Ohm' law, the laws that govern electricity. One of Ohm's Law's states that if one of the three properties of electricity remains constant[Voltage - Voltage in a vehicle remains steady at battery voltage] and one of the other two goes down[Resistance - Resistance goes to zero as there is a direct path back to the battery negative terminal] then the final property must go up proportionally[Amperage - Amperage goes to battery amperage]. The fuses amperage rating is over taken and "POP", the fuse melts creating an open in the circuit[s], protecting the circuit[s] just as it was designed to. So, the fuse will continue to blow until the short to ground in the circuit[s] it is protecting is repaired. In the diagrams down below I have include the passenger compartment and the engine compartment fuse box diagrams with call outs. Please get back to us with the fuse that keeps blowing and we can go from there.

Thanks,
Alex
2CarPros
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Saturday, December 28th, 2019 AT 10:13 PM
Tiny
CA7922303
  • MEMBER
Of the 6 diagrams you just sent, it's the engine fuse block diagram on the far left bottom. In that diagram, it's the 10 amp fuse to the left of the 10 amp air con fuse and underneath the 20 amp ECU fuse.
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Sunday, December 29th, 2019 AT 6:26 AM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again, Okay, so there's the problem. You have a short to ground somewhere in that circuit. The circuit provides power to the ECU, or "computer" for your vehicle. This is why your scan tool cannot link with the ECU. This is going to be the ECU3 fuse. In the diagrams down below I have included the Engine Management wiring diagrams with the ECU3 wires highlighted for you and a guide on how to find a short to ground in an automotive electrical circuit. You will need to use a Digital Multi-meter [DMM] to go through these guides, so here is a link below explaining how to use one, if needed:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go through these guides and get back to us with what you find out. Happy Holidays.

Thanks,
Alex
2CarPros
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Sunday, December 29th, 2019 AT 7:56 AM
Tiny
CA7922303
  • MEMBER
Back from holidays now. I'm getting 10 volts on the center of the camshaft sensor connector and 0 on pins on left and right of center. I get the same readings on the crankshaft sensor so I assume the connector is good. ECU 3 on the engine fuse block gets a reading on only one pin and the other two 20 amp fuses for ECU get readings on both pins. I cannot not find any location photos anywhere for a 2001 2.7 for joint connector c33. I see a 2005 2.7 photo on AutoZone repair guides, but it shows it behind removed fuse block and it is not there on this 2001 I am working on. Any ideas? Really appreciate all the help.
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Wednesday, January 1st, 2020 AT 3:00 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

Yes, the problem is a short to ground in the circuit[s] the the ECU3 fuse is protecting. In the last reply that I sent I sent along the wiring diagrams of the ECU3 circuit with the wires highlighted and a guide on how to find a short to ground in an automotive electrical circuit. Please go through these guides and get back to us with what the short to ground is.

Thanks,
Alex
2CarPros
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Wednesday, January 1st, 2020 AT 5:08 PM
Tiny
CA7922303
  • MEMBER
Wanted to let you know that now have engine running. It appears that I damaged camshaft sensor plugs when removing/installing heads. Crank sensor I believe was shorted out after I plugged in damaged cam sensor because crank sensor was never disconnected because it is in block not heads. Once I replaced cam sensor I got correct voltage readings with crank sensor unplugged. Once I replaced crank sensor, engine runs. Thanks for all the help and great information. I greatly appreciate it. Great service.
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Tuesday, January 21st, 2020 AT 7:09 AM
Tiny
KEN
  • ADMIN
SCGRANTURISMO is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.
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Thursday, January 23rd, 2020 AT 10:57 AM

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