Cold starts in cold temps
Nov 8, 2006 | 11:50 PM
#11
Sounds like the IAC Idle Air Control Valve) is not functioning properly, it may just be gummed up with carbon. It's located in the throttle body. You could try cleaning it and giving the throttle body a good cleaning while you're in there. If cleaning it doesn't work, it may need to be replaced.
Nov 13, 2006 | 10:34 AM
#14
Thread Starter
Teching In
Joined: Nov 2006
Posts: 4
Likes: 0
From: Western Colorado
Update for all of you. I removed, inspected, and cleaned the MAF this weekend. The IAC is part of the MAF. It was'ent too dirty at all. I cleaned the bulb looking thing with the spray electrical cleaner and my binocular lens cleaner rag. I cleaned the inside of the duct from the MAF to the throttle body - once again, it was'ent in too bad shape. I also removed and cleaned the IAC valve and then just for the heck of it, I removed and cleaned the ERG valve. This had lots of carbon on it but still functioned. Waited till this morning when it was cold, started it and absolutly no change from what it has been doing.
The one thing that I never found from dewmanshus post was the little port above the main intake that I need to hose down with a cleaner.
Is there a way to test the IAC? I hate to drop 100.00 or so for a new MAF and find that it was not the problem.
Thanks for the help everybody, if any more ideas out there, I am all ears.
Dan
The one thing that I never found from dewmanshus post was the little port above the main intake that I need to hose down with a cleaner.
Is there a way to test the IAC? I hate to drop 100.00 or so for a new MAF and find that it was not the problem.
Thanks for the help everybody, if any more ideas out there, I am all ears.
Dan
Nov 18, 2006 | 11:04 PM
#16
Originally Posted by closet red neck
My truck is doing the same thing!!! But I have an ses light on and the code PO300. I have performed most of these things listed to fix the problem but no luck. All of this happend after the converter swap sitting in the driveway while warming up. I can't figure this out. Here is the info on the freeze frame data:
Well I installed my 3rd Fuddle converter last week and still getting ses codes. I barrowed a buddies scan tool and this is what showed up from the freeze data:
DTC that caused the freeze data=PO300
Throttle position=0.0%
Load value=3.9%
RPM=885
Air flow rate=10.21 GR/SEC
Map sensor=35 KPA
Coolant temp=82º
STFT#1=0.0%
LTFT#1=2.3%
STFT#2=0.0%
LTFT#2=1.5%
STFT#3=50.0%
LTFT#3=-18.8%
STFT#4=57.0%
LTFT#4=-3.4%
Vehicle speed=1 MPH
Fuel system=#1 & #2 open
Check it out. I have already posted but this guy is having the same problem to. I took my truck into the dealership and they'er
also. They told me that they would have to dive into the engine and see what was going on.
James
Well I installed my 3rd Fuddle converter last week and still getting ses codes. I barrowed a buddies scan tool and this is what showed up from the freeze data:
DTC that caused the freeze data=PO300
Throttle position=0.0%
Load value=3.9%
RPM=885
Air flow rate=10.21 GR/SEC
Map sensor=35 KPA
Coolant temp=82º
STFT#1=0.0%
LTFT#1=2.3%
STFT#2=0.0%
LTFT#2=1.5%
STFT#3=50.0%
LTFT#3=-18.8%
STFT#4=57.0%
LTFT#4=-3.4%
Vehicle speed=1 MPH
Fuel system=#1 & #2 open
Check it out. I have already posted but this guy is having the same problem to. I took my truck into the dealership and they'er
also. They told me that they would have to dive into the engine and see what was going on.James
Nov 18, 2006 | 11:18 PM
#17
Originally Posted by closet red neck
My truck is doing the same thing!!! But I have an ses light on and the code PO300. I have performed most of these things listed to fix the problem but no luck. All of this happend after the converter swap sitting in the driveway while warming up. I can't figure this out. Here is the info on the freeze frame data:
Well I installed my 3rd Fuddle converter last week and still getting ses codes. I barrowed a buddies scan tool and this is what showed up from the freeze data:
DTC that caused the freeze data=PO300
Throttle position=0.0%
Load value=3.9%
RPM=885
Air flow rate=10.21 GR/SEC
Map sensor=35 KPA
Coolant temp=82º
STFT#1=0.0%
LTFT#1=2.3%
STFT#2=0.0%
LTFT#2=1.5%
STFT#3=50.0%
LTFT#3=-18.8%
STFT#4=57.0%
LTFT#4=-3.4%
Vehicle speed=1 MPH
Fuel system=#1 & #2 open
Check it out. I have already posted but this guy is having the same problem to. I took my truck into the dealership and they'er also. They told me that they would have to dive into the engine and see what was going on.
James
Well I installed my 3rd Fuddle converter last week and still getting ses codes. I barrowed a buddies scan tool and this is what showed up from the freeze data:
DTC that caused the freeze data=PO300
Throttle position=0.0%
Load value=3.9%
RPM=885
Air flow rate=10.21 GR/SEC
Map sensor=35 KPA
Coolant temp=82º
STFT#1=0.0%
LTFT#1=2.3%
STFT#2=0.0%
LTFT#2=1.5%
STFT#3=50.0%
LTFT#3=-18.8%
STFT#4=57.0%
LTFT#4=-3.4%
Vehicle speed=1 MPH
Fuel system=#1 & #2 open
Check it out. I have already posted but this guy is having the same problem to. I took my truck into the dealership and they'er
also. They told me that they would have to dive into the engine and see what was going on.James
Nov 18, 2006 | 11:44 PM
#18
Originally Posted by budhayes3
I just noticed your post...since your problem started after the converter swap, I'd be looking towards something related to that. P0300 is a random misfire code...is it possible that a spark plug wire came loose or a plug got cracked? Also, I remember reading about a few guys experiencing some wierd codes after converter swaps...might wanna try a search for "converter codes", or "converter check engine light", or "stall codes", etc...
Either that, or it's the intake leak as suggested above, causing you to run lean and misfire and causing that positive STFT situation like what's being seen.
Nov 19, 2006 | 08:48 AM
#19
Launching!
Joined: Aug 2002
Posts: 278
Likes: 0
From: Summerville, Sc
Originally Posted by dc_justin
Yep. Look for an exhaust leak near the O2 sensor. Look at those STFT values. +50% +57%. PCM thinks you're lean, adding in 50%+ extra fuel. Super rich misfire as a result.
Either that, or it's the intake leak as suggested above, causing you to run lean and misfire and causing that positive STFT situation like what's being seen.
Either that, or it's the intake leak as suggested above, causing you to run lean and misfire and causing that positive STFT situation like what's being seen.
Nov 19, 2006 | 09:46 AM
#20
TECH Enthusiast
Joined: Oct 2005
Posts: 552
Likes: 0
From: stringer, ms
Mine did the same thing...
and i kinda was wondering about the bat not holding the computer. I was right. I had the batt checked and it was weak and it was resetting my computer on cold nights.. Try that man. Good luck!
Derek
Derek
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