Thread: Sr20 det s14 vaccume miss

So i have a s14 with a black top sr20det in it.
My problem is it sometimes miss and spluters almost cuts out under vaccume. It boost fine. It seems to do it after it has been warmed up fully and is then turned off for a short period. On start up it will then spluter and miss unhder vaccume but as soon as it hits 1psi boost runs no problems. Might also be helpfull i had a big boost leak that i fixed but it didnt do it while i had this(also had a small vaccume leak aswell).
I have so far replaced
-spark plugs
- coils
-fuel pump
-fuel filter
-Fixed all boost leaks and vaccume leaks

will miss under vaccume but but driving at 100kmph will come right after 2-5mins. sometimes does it after cruising through town at 50km after driving at 100km

????

What ECU - Stock, Modified, AFC added?

What MAF?

Stock fuel injectors or upgraded?

What spark plug - Brand, Type & Temperature?

What is the spark plug gap?

What is the fuel pressure?

Does the fuel pressure vac line direct to Intake Maniflold or is it tee-d for anything else?

Is the BOV recirculated or is it to atmosphere?

If the MAF setup as draw through or blow through?

Pics always help...

As far as I know engine is stock other than blow off valve and front mount ic and external waste gate. The spark plugs are NGk iridium tip Bkr6eix 11 with the stock gaping. Blow off valve is to atmosphere ill post pic of maf soon as I'm unsure what you mean by draw through or blow through