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Replaced Motor.. Now There Is No Spark :(

boostdef

By boostdef,
in Engines & Forced Induction

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boostdef Enthusiast

boostdef

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Long story short, I replaced the motor (rb25det in an r33) with another stock standard one.

Now the new motor had a different coil setup which didnt match the existing loom, so I put the old coils on and it all seems to be plugged in as before.

When cranking i get no spark in the plugs.

There is only one plug which I am mistified about, and that is one coming from the power box on the drivers side of the car. It has 2 prongs in it. I cant for the life of me find the matching plug, and I cant remember if it was previously plugged in.

Spark was perfect before motor change.

Can anyone let me know any suggestions on where to look? Or what tests(with a multimeter) can I do to narrow it down?

Thanks Heaps!! Once its runnin, im driving it off a cliff for a bit of revenge.

J'z-R33 Grand Master

J'z-R33

Posted
Posted

What year is your car and what year motor went into it?

series one have an external ignitor (grey box on top of the valley cover), series two have an internal ignitor on the actual coil.

Cheers,

Johno

boostdef Enthusiast

boostdef

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  • Author
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What year is your car and what year motor went into it?

series one have an external ignitor (grey box on top of the valley cover), series two have an internal ignitor on the actual coil.

Cheers,

Johno

Hi mate thanks alot for the reply. Its a S2 motor going into a S1 r33, but I used all the S1 accessories/loom.. etc.

Anyways, i got it running it turned out i didnt have the CAS clipped in fully... BUT...

Start it, runs for about 30 seconds, starts sounding chattery, black smoke out the exhaust, revs fluctuating.......

Turn it off, pull the dipstick and its coffee white in colour, with water leaking out of the exhaust.. I cant win my last motor blew whilst my mother was driving it at about 60km/h, and now ive spent 2 days installing this one to find out it has a blown head gasket/cracked block... who knows im over it.

So now Im out of options.

How much is it for a shop to fix a head gasket? shave the head and all that??

boostdef Enthusiast

boostdef

Posted
  • Author
Posted
Headgasket, or cracked block or cracked head.

For what its worth maybe find another motor.

Yeah. Well to his credit the seller has been very co-operative and decided to give a full refund (Within half an hour of emailing him). Just means I have to take it back out again but given the situation i am a little more relieved.

I have a rebuilt bottom end which i was practically given but i didnt really want to go the rebuild stage with the gaskets and all that as I just want a reliable car again... But since I have probably halved the time of removing and replacing an rb25det motor due to experience, I may give it a go :D :D

The old head that was on the blown motor I still have, so I may get that crack tested and skimmed or whatever it needs.

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