wont start when cold

2008 Mercury Mountaineer with One way Astro-Start. Will not stay running when its cold outside. When its warm it has no trouble. When cold it runs for 20 seconds or so and shuts off. The brain has been replaced a few times with no luck. Could this be due to the secuirty bypass relays freezing? The only thing I could think of was relays. I have yet to figure out what was used for the install but thought Id see if anyone had any insight.

Need to find out what bypass module was used.

Im digging into it more tomorrow. Ill get the RS model number and bypass module.

t&t tech wrote: My  bets are on it being a tach issue! Anyone else with me?

I agree. Try re-programming the tach at a higher RPM.

Not familiar with Astro-Start units. How is the tach programmed?

christopherrice wrote: Not familiar with Astro-Start units. How is the tach programmed?

This statement tells me you did not do the install! Correct?

I would take it back to the shop that did the work.

Do you have an install guide for this unit?

There are several install guides available on the 12volt.

dip 1 5,6,7, up. Start the car, hit the foot brake... the unit will click and flash the LED on the brain. when it's done, put the dips down

and hit the brake. shut the car off and attempt a remote start!

Thank you. I did not do the install. Some crap shop did and gave up on fixing it after replacing the brain a few times. They wont cover it under warranty anymore and try to charge even when they dont do anyhing to fix it. Im actually no RS genious lol. Ive installed a Compustar once and am currently about to install 2 Viper systems. Im in need of serious help on those and havent got much for answers. So any help I get on this stuff is greatly appreciated. IdataLink instructions have got me all sorts of messed up, otherwise Im fine.

could be tach issue( these vehicles can just be tachless) or what type of bypass did they use for the secur-lok key? if they placed a key in a universal box i have seen issues with ford keys not liking to freeze!either try to insulate the key in the box module, or upgrade to a keyless interface (ala i-datalink)or if you can get a ford bypass(made by codesystems for ford dealers) it has the chip encased in a gel to protect from freezing , i have used these many times and never had a cold no start issue but i have had that when a key was placed in a universal bypass

I have seen alot of problems with using the tach-less feature in cold climates...I would suggest seeing if there is even a tach connection...If not...Might be a good idea to hook up tach...M.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!