Subject: turbo wont kick in
Question: Sir: i have a 1986 300 zx turbo problem started after recall 10 years old. replace all fuel injectors hoses and wire harness. problem turbo dose not kick in it dose once in a great while als0 since they performed this service the engin dose not start as it once did it takes 3 to 4 seconds to turn over sent letters top japan . did not do any good.do you have any thoughts onth matter.i dont drive this car very often,twice a mmonth may be 80 000 miles
Answer: Matt,
Since I mainly just answer Mitsubishi questions, my answer to your Nissan question will just be general since I'm not as familiar with their engines. You may want to ask the Nissan Expert for further explainations.

I do know that the '86 300ZX turbo had a number of recalls; 10 Safety Recalls and 2 General recalls to be exact. Most dealt with components of the fuel injectors, so it's good you got that resolved.

Because your turbo is really only functional due to air flow, than that means either there is a vacuum/air leak somewhere in the system. Or, in your case, the new fuel injectors they installed may not be providing as much fuel as your original ones. If your car's computer see that there is less fuel, it will limit air flow. Thus, your turbo boost will be reduced. And, starting will will be more difficult is the engine is not getting fuel quick enough. The best advise I could give you is to take your car back to where you had the fuel injector replacement performed, and get them to check the new injectors they installed. It's possible they put in the wrong ones.
Good luck!