After restarting the car when warm, idle is crap.

[90 GSX]

The car feels like it wants to die right after you start it after it has fully warmed up, almost like it's not getting enough air or something but it is. It idles low and makes lower vacuum than usual (15 compared to around 19) like it loaded somehow. Right when you start moving or rev it a few times it starts getting smoother. What is this all about? Could it be because I eliminated that fuel solenoid thing vacuum line?? I have a boost leak at the TB shaft, I don't know if it would cause that but I do in fact have an idle misfire in closed loop. All my problems are in closed loop actually... any ideas? Any questions?

 

[herovueboi]

Hey, I am not 100% sure but my DSM had the same problem with the warm temps. It turned out to be my main relay that needed replacing. I narrowed it down by changing my fuel pump, using fuel injector cleaner and intercooler cleaner. Though, when I cleaned my intercooler, it was smoother overall. You should think about trying one of those methods.

 

[90 GSX]

What main relay? I cleaned my intercooler, it's spick and span with no leakage. I also have a filter on the crank breather (inline filter, it's still hooked up to vacuum).

 

[siceclipse]

Fuel pressure silenoid (sp)
there was an artical that said when this starts going it kills your engine durring "hot starts"

I think there is a VFAQ on it or its in the 1001 questions site.


do a search on "hot start"