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Author Topic: have spark, no fuel. FPR? 12v VR6 content  (Read 800 times)

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yokust

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #25 on: October 01, 2009, 07:23:31 PM »

I would put money on a bad engine speed sensor.

If no engine rpm, ecu turns off injectors and spark.

Fuel pump will still run, and coil is powered by fuel pump relay
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brandonb85

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #26 on: October 01, 2009, 07:35:06 PM »

I am reading that it is possibly an ignition switch ... we are messing with the immob. stuff now
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scurvy_bandit

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #27 on: October 01, 2009, 08:06:05 PM »

I would put money on a bad engine speed sensor.

If no engine rpm, ecu turns off injectors and spark.

Fuel pump will still run, and coil is powered by fuel pump relay
Since he is getting fuel, and the coil is hot... it may have something to do with the engine speed switch. If that is bad, when you try to crank wont the RPM not show up? I am not very vagcom knowing... Also Mike, do you have a lot of keys on your ign key? I heard a lot of weight from that will make the ign switch go bad.
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yokust

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #28 on: October 01, 2009, 08:42:30 PM »

Immobo system will make a vehicle start and then die, each time if its kicking in.

If it never fires its NOT immobo

If he is getting fuel pump, and coil power most likely not an ignition switch. Both of those are fired from ecu, after the key signal is given
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brandonb85

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #29 on: October 01, 2009, 10:07:40 PM »

Maybe a bad ECU ground?
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mikeminnillo

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #30 on: October 01, 2009, 11:11:12 PM »

heres the latest.  ran the vag com, and only relevant code i got was

17978 - Engine Start Blocked by Immobilizer
P1570 - 35-10 - - - Intermittent

tried a couple immobilizer clearing techniques found on the vortex; ie. unplug the battery for 10 min, or leave key in on position for 15 min. but still nothing.  i have checked power at the spark plugs themselves, and there is nothing.

im at a loss.  anyone?


as far as the engine speed sensor;  where is this located on a 12v?  i poked around a bit with a flashlight, but didnt see anything that resembled such a sensor.  im pretty sure i found the cam sensor though.
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yokust

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #31 on: October 02, 2009, 11:14:30 AM »

While you had vag-com there did you check for engine speed/rpm signal inside the block values?


The crank/engine speed sensor is on the bottom of the engine right behind and right of the oil filter canister. It will lead up to a light grey connector
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brandonb85

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #32 on: October 02, 2009, 11:20:14 AM »

I wonder if the front clip has to dropped on the vr..... 

It's almost impossible to see the canister...tha t's where I'm getting oil supply for the charger
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yokust

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Re: have spark, no fuel. FPR? 12v VR6 content
« Reply #33 on: October 02, 2009, 03:07:41 PM »

Nope you can get to them no problem
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