does a datsun necessarily need a cold start valve?


Asked by May 23, 2013 at 08:08 PM about the 1978 Datsun 280Z

Question type: Maintenance & Repair

12 Answers


If the cold start is removed then it will have a hard time staying running with a cold engine and get worse as the outside temps drop,it may not even start at all cold. So to answer your question you need the cold start.

3 of 3 people found this helpful.
Best Answer Mark helpful

@tennisshoes they told me i can bypass it.thats why im asking the question.but thank you for you answer it helps me out as well


My '77 280z didn't need one. The CS valve is a piezo-electric injector on our cars. When my valve started to leak many years ago I took the valve off and plugged the orifice on the intake manifold. tennisshoes has a completely valid point car stays in south Texas where temps below freezing are rare and of short duration. The Bosch ignition and fuel injection system is bomb proof and fine w/o the CS valve in S. Texas winters.

1 of 1 people found this helpful.

so without it it wont be able to start in cold weathers?


It may start but you will have trouble keeping it running until the engine warms up some, it will most likely try popping back through the intake. It all depends on how cold your climate gets.

1 of 1 people found this helpful.

well i live in the antelope valley so in the winter it gets really cold and the summer really hot but i have another question on the same subject...without the cs valve would it do any damage to the car?


It won't hurt the motor while you seek a replacement and install before Fall season.

1 of 1 people found this helpful.

would it be good to buy a new one or a used one?

1 of 1 people found this helpful.

Personally I'd go new; $80 is nothing compared to a car that won't and need re-troubleshooting/fixing the issue again.

1 of 1 people found this helpful.

where can i find a cheap one?


i ripped mine out. only useful for very cold weather starts. and even without it you can still start, just might take a bit more cranking.

1 of 1 people found this helpful.

I read your motor will run rich if the cold start valve is not working properly after warm-up.

Your Answer


Looking for a Used 280Z in your area?

CarGurus has 11 nationwide 280Z listings and the tools to find you a great deal.


Datsun 280Z Experts

  • #1
  • #2
  • #3
    Andrew Olsen
View All

Related Models For Sale

Used Datsun 280ZX
24 listings
Used Chevrolet Corvette
278 Great Deals out of 20,708 listings starting at $2,990
Used Ford Mustang
692 Great Deals out of 38,314 listings starting at $895
Used Chevrolet Camaro
404 Great Deals out of 30,571 listings starting at $3,550
Used Toyota Supra
63 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.