69chvl468

4L60E, GMP Hot cam, bbk intake and TB and the ecm was tuned for the cam. Its weird, it idled fine when it first fired. but now it doesnt fire unless I have the throttle open part way, and when I let off it dies... the MAL light isnt on, no trouble code either.

turbov6bryan

Does it have a loose vacuum line? Any holes between the MAF and TB?

69chvl468

No loose vacuum line. Only vacuum line is the brake booster, the rest are plugged. It might be the connection between the tb and maf. I have a bolt on style maf, sets in place with set screws. maybe thats the problem...

ssduane

iTrader: (3)

sounds like you need to do a idle relearn. Also try pulling the IAC out and making sure it is clean.

CalEditor

iTrader: (1)

What year setup is this and are you running a Cable or ETC?

69chvl468

It's a 98 f body ls1 and ECM with a standalone harness and 4l60e. Running a bbk tb with a cable. It idled fine at initial start up, then disconnected the bat to do some work. Now it won't idle at all. And it only starts holding the throttle open while cranking. I'm still
green to the ls motors, so bear with me...

ls1nova71

iTrader: (4)

Take it out and drive it some. My car will do that when the battery goes dead when it sits over the winter, I have to keep it running. But after i drive it for awhile it goes back to normal.

69chvl468

Ill try to get out and drive it, a little tough when it keeps dying at every stop sign!!!??

lamdenali

iTrader: (5)

The ECM need relearn, call your ecm guy to show you how to relearn the ECM, whenever you disconnect the BAT. it'll need to relearn

69chvl468

Ok well I was able to take it out for a drive, drove it for awhile. It seems to be on and off like when ever it wants to stop idling. Sometimes it stalls, sometimes it doesn't. Waitformeperformance did my ecm. Ill try to give him a call..