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Rb25neo starts but stalls immediately

Con333
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Con333 Newbie

Con333

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The car will start up but stall immediately it will not hold an idle unless I put my foot down on the accelerator and hold revs, unsure why this has happened the car has been sitting there for a few months and the only thing that has been changed is the coil pack harness, I have tried to put the old one back in but still the same problem?

GTSBoy Grand Master

GTSBoy

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1 hour ago, Con333 said:

car was running fine a few hours before?

 

44 minutes ago, Ben C34 said:

More info please.

 

10 minutes ago, Con333 said:

the only thing that has been changed is the coil pack harness, I have tried to put the old one back in but still the same problem?

Oh.

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Danowner Contributor

Danowner

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On 18/03/2021 at 3:46 PM, Con333 said:

Just checked the vac hoses they are all good there are a few wires that have been hacked up by the previous owner if you know what any of them are maybe I pulled one out without taking notice?

 

skyline.jpg

That could easily be your TPS (Throttle position sensor) wiring. 

You've got the exact same symptoms as my 34, however I had changed the fuel pump a week or so before, and so when I was troubleshooting, the fuel pump didn't even cross my mind. Ended up being the main hose connected to the top of the fuel pump literally had a hole in it, so all the pressure was gone, as I had done a dodgey DIY job with a hose clamp, had to pull it back out, re- clamp the hose so it was a solid connection, been in for over a year now and hasn't skipped a beat.

If you've done anything fuel related, look at that shit hey. 

(Also, that plug at the bottom of that pic looks to be the main harness plug I'm guessing, looks same as mine. Maybe check the polarity of your TPS, and even check the polarity of each cable there in that pic, make sure connection is solid all way through each end of those cables. 

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