Car hard too start n dont wuna idle - 1994 BMW 318

check that the glo-plugs are working and have the injector tips checked /replaced.

Idle valve is not working

The first thing you need done is a scan of the TCM for fault codes

I dont whats so hard if you are asking the right people? try any GM dealer. I dont have access right now, but I dont think a Trailblazer HAS a IAC valve.

take out idle air motor stuff a plastic bag in the hole deep and pack it in there hard hold it in there,2 people, start motor dont take your hand off of key engine may run away with rpm and need to be turned off if you didnt seal that hole well if it idles really low and doesnt race then bye air idle motor ifit still races the same then check for vaccumn leaks if you cant under stand then dont try this

possibly vacumn leak at the brake booster,brakes will be hard and will not idle very well

Hello,
The car may be hard to start because it may need a normal tune-up. If the spark plugs are pretty used, they will slowly stop burning as much fuel because the spark slowly gets lesser and lesser. On a cold day the fuel is harder to ignite with a small amount of spark.
Normal idle when its cold means that your cars idle is probably too high. If you lower the idle, the choke on a cold day will keep the idle a little higher until the motor warms and then it will kick back off. If the idle is too high, it will run very rich, smothering itself with fuel, and causing the idle to stay low. When the car warms, its creating better spark when its warm, and with the idle being too high its running at a fast idle.
The car wont start sometimes can be the cause of a few things. If the ground is bad on the fuel pump, it wont make a good connection sometimes for when you turn the key on, the fuel pump dont pump the fuel to the engine. Another one can be that your accessory switch can be loose going to the fuel pump. I think its your ground though. Good luck! Hope this helps.
Have a nice day. -Steve

it could be the throttle positioning sensor.

you might have a bad fuel pump just fought this problem on a frends car car start ok cold and hard starting after driving after a complete tune up the problem still exsisted replace the pump no more problems car cept setting an o2 senser code

the flat spot and hard starting is caused from a faulty accelrator pump or a blocked discharge jet in the pump circuit i would be putting a kit in the carby to improve mpg

the only adjustments on the carby is idle speed and idle mixture which dont affect cars mpg