starting and idling
Record Breaker
Joined: Dec 2008
Posts: 1,200
Likes: 1
From: Claremont NC
I'm seeming to have a similar problem with my 4.7L. When it sits for more than maybe ten minutes, then it takes about 10 seconds of cranking to start. Sometimes it sets the SES and sometimes it doesn't. I took it to Advance and Autozone and they said it had a miss on cylinder #2. When I first bought it and changed the plugs, cylinders #2 and #3 had never been changed before because of the coolant lines going over the COP's. I replaced the coil on cyl. #2. I don't want to go replacing injectors but I don't know what else to do. Does anybody have a better idea, (i.e. TPS, IAC,). I hope I'm not stuck buying a set of injectors.
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
on the miss, if you think it is a bad injector, swap its location with the one next to it, see if the miss follows the suspect injector, if so then replace it, if not then your injector is fine, trying the key cycle trick will help to determine if you have a weak fuel pump, OR possibly just a bad anti-drain back valve in the fuel pump (you can live with the second if need be)
Record Breaker
Joined: Dec 2008
Posts: 1,200
Likes: 1
From: Claremont NC
What's the idle rpms? If it's in the 6-700 rpm range, you're right on target.
Registered User
Joined: Jan 2011
Posts: 14
Likes: 0
starting & idling
I was having the same problem, only in cold weather
. Cleaned the TB & IAC and still not right. Replaced the IAC & reset the PCM. Runs great. Idles on its own and don't have to hold the brake & accelerator at stop signs & red lights. Glad I found this forum, has been a major help. 
. Cleaned the TB & IAC and still not right. Replaced the IAC & reset the PCM. Runs great. Idles on its own and don't have to hold the brake & accelerator at stop signs & red lights. Glad I found this forum, has been a major help.