i did an sr20det in my s13 240 and had no problems, it started up fine and ran great but we just did a red top in my friends 92 fb and its running awful. the idle jumps and it back fires alot and bogs out. got any ideas wuts wrong (iacv, tps)?

 

I don't have a lot of turbo experience but I've worked on quite a few Nissans... two old maximas, my dad's two sentras, my friends maxima and my s14 and I would say idle issues are pretty common for nissans. Most often is does seems to be linked to IACV, TPS, EGR. I would run seafoam through your IACV and EGR and test all three with a multimeter to see if any of them are bad. Also make sure your ignition system stuff is all working properly (distributor, wires, plugs)

 

^ yeah you so could of given some help with out naming all the cars youve worked on.

BTW its not a common on nissans, its common on engine types.

 

ive heard alot of people saying that they bought a new iacv thinking that it was the problem but it wasnt, does anyone know how it would run if it were the iacv

 

if its the iacv it would have erratic idle.

The the tps continuity as well as the maf, and timing make sure it right or the car will not want to run correctly.

 

CTS is related to wonkey idle, fixed me up.