How do i bridge or bypass my 1999 nissan hardbody v6 alarm/immobiliser, lost the remote

You will need to go to either Nissan directly or to an engine electronics specialist retailer for this part. The ECU will also need to be programmed specifically to your vehicle. So this is likely to be an expensive repair.

Question edited for clarity.

Clean the Throttle Body and MAF with carburetor cleaner. The Throttle body is soiled with carbon and isn't closing properly.

Contact napa

your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your car dealer to get a new one,they are programmed for each car only,you cannot bypass it.,,,,,,2

you can't!!!!

2000 year,. ??????????? try one more time the year.
and country.
bypassing them is not hard.
some are easy others are you must replace whole ECU or get it reprogrammed by hackers.
join the Nissan real forum and ash there. they never come here.

the newer the immobilizer the more impossible it becomes to fool.
my 08 is impossible. as 1 example
back in 1996 , easy
see?
how to hack immo's is a very complex subject (can be)
on my car the fob , transponder sends a rolling encrypted pass code.
I will never break that code. ever.

ever use google ever try this.
https://www.google.com/webhp#q=nissan+forums

this works for all cars, do that and post to the exact car forum
and get fast accurate and anwers.
an on IMMO questions, and hacking , times 10000. better.

If you are no thief, then you would shell out for a new key with a working immobilizes button. I am sure your insurance company will love you for immobilizing your immobilizes...not.

if the alarm/immobiliser could be bypassed the thieves would have it away in no time....you will have to buy a new remote and have it coded to the car.....

sometimes it depends on the type of allarm, if it is factory fitted they are a nightmare to do as most of the wireing for the allarm is intergrated into the loom, where as if it is an after marked alarm ( one fitted later on ) it shouldnt be to bad but still a long and complicated job to find all the wires and reconnect the originals bypassing the immobiliser/alarm if you are a complete novice this should not be attempted as you could immobilise the car completely, best thing for you to do is get an auto electrician to have a look at it for you, sorry its not much help

first try replacing the battery in the remote. if that does not work you will probally have to bring to dealer to have alarm either bypassed or replaced.