tug686spd

iTrader: (11)

The car is a bone stock 99 Trans Am. The problem first happend a couple weeks ago after a few strait days of rain so i figured it was moisture but now it does it on a regular basis. On cold start fires right up and runs fine. After car is up to running temperature and shut off for a short period of time and restart it, it will run fine for about 10 seconds and then have a terrible miss for about 5 seconds and then run fine until its shut down again. the code that came up are p0327, p0405, p0430. I have been searching but cant find a common cause for all 3.

chevymec

iTrader: (19)

Get a scanner and look at the O2's. They might be getting heat soaked. I had a 6.0 do that once after warm up and I had to replace both O2's on the passanger side. Ran good after that.

tug686spd

iTrader: (11)

After hooking the car up to a scannner a few times and it not acting up I went ahead and replaced all 4 02 sensors (already had them for my other car) and the miss is gone. The p0327 and p0405 are still there and a function test on the scanner says all sensors are working. Any other ideas out ther for these 2 codes.