Rb25neo starts but stalls immediately

[Con333]

Rb starts then stalls unless I have my foot on the accelerator holding revs anyone else had this issue car was running fine a few hours before?

[Ben C34]

More info please.

[Con333]

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]

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.

[Ben C34]

Ahh the old nothing changed but some things did change.......

 

Does it run nicely when you have your foot on the throttle?

[Con333]

runs fine no misfiring just stalls as soon as I take it off

[trel]

Check vac hoses.

 

[Ben C34]

so just to be clear, did anything else change?

 

you did the coil harness without removing any other component at all? Didn't accidentally unplug other plugs?

 

 

[Con333]

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?

 

Edited March 18, 2021 by Con333

[Danowner]

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?

 

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.