Idle drops way down when car restarted when warm then goes to normal.

[AL92]

Car is sometimes dropping way down to like 500 on tach when started warm.It doesn't seem to do this cold.It does go to around 1000 on tach after a minute or so but sounds like it wants to stall out.
I don't have my 264/272 cams in yet and am running stock chip in my eprom ecu.It did this with my other non eprom ecu.I have new fuel injectors,fuel pump,afpr.New tps,new 02 sensor lots of other new parts like wires,plugs,coilpack,power transitor.Could it be the isc.Can I just unplug it?
The car runs aces aside from this little thing..well aces aside from phantom knock off idle but hoping my new custom chip will fix that problem..otherwise dsmlink here I come.!!
Low trim does look lean around 125,mid was 111 high was 100 but just installed new eprom yesterday.

 

[moonraker]

i am having this same exact problem, but i have the eprom chip. has anybody noticed this?

 

[cturok7]

I don't think this is the problem, but go ahead and clean the MAF sensor. I can't tell...maybe the temperature of the air, after warmed, has an affect. I'm saying the possible cause could be the MAF not measuring right. Try cleaning it (clean with MAF SENSOR cleaner). Maybe you'll see improved results.

 

[rich3389]

make sure your BISS is adjusted correctly.

 

[moonraker]

i am having the exact same problem. is there a way to test for a bad or faulty MAF?

 

[doggo]

Car is sometimes dropping way down to like 500 on tach when started warm.It doesn't seem to do this cold.It does go to around 1000 on tach after a minute or so but sounds like it wants to stall out.

Classic ISC issues. Unplugging the ISC wont really help as the ECU still thinks its installed, and unless you happen to unplug at a time when the ISC is positioned correctly for whatever RPM you are looking at.

Use DSMlink to ground out the ISC action and check BISS settings so that you are getting a consistent 750 RPM at idle. THEN enable ISC ground and see what happens, if your idle goes to shit, its probably ISC.