First time on here and looking for some help. I converted my automatic 1990 automatic twin turbo 300zx to manual. Upgraded intercooler 850cc injectors and a set of hybrid turbos. All back together but just does not want to rev. No codes. Ticks over no problem. It hasn't been remapped - could this be the problem ? Any help appreciated.

Sounds like the air flow meter under the nose pane giving you issues. Make sure it's plugged in and the terminals are nice and clean and not gunged up, if not might be new MAF time.

Clean the terminals

the male and female connection on the a f m tried another airflow meter made no difference

First time on here and looking for some help. I converted my automatic 1990 automatic twin turbo 300zx to manual. Upgraded intercooler 850cc injectors and a set of hybrid turbos. All back together but just does not want to rev. No codes. Ticks over no problem. It hasn't been remapped - could this be the problem ? Any help appreciated.

 

So you've just completed an auto manual conversion, along with upgraded intercoolers and larger injectors? If so and you have not had the ECU mapped for the bigger injectors then there is your problem. It will be fuelling all wrong.

I was going to suggest a wet/damp MAF too

Larger injectors and no chip or remap to support the mods, im surprised its running at all lol

Thanks for your replies.

Just didn't wanna take it to be remap incase it was something Else.

Under normal circumstances, it would be the maf at fault as it will not rev over 2.5k revs if dead, but it it does seem that with the injectors uprated the fueling is way out.

 

Noz out tuning guru will no doubt be able to offer some advice :thumbup1:

It shouldn't really be running at all, it will be dumping 2.3 times the expected/required amount of fuel. If there are no codes, then the inability to rev won't be due to the MAF.

 

Isn't there a massive plume of black smoke out the exhaust?