Cold, cold No start... pedal to floor... starts - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


GMC/Chevrolet Truck/SUV When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-03-2014, 10:43 AM   #1
Junior Member
Thread Starter
 
Join Date: Dec 2013
Location: Lake George
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Crispy is on a distinguished road
Default Cold, cold No start... pedal to floor... starts

New to me '06 Envoy w/ 4.2. 87k miles. I don't even have plates yet but it was in the way last night at -4 degrees F so I was looking forward to the test. It turned over and lurched a couple times but didn't start after 3-4 attempts. I reluctantly put the pedal to the floor and tried again. Fired right up but idled rough for a couple minutes until it smoothed out and ran fine. This usually isn't the routine with fuel injection but it'* worked for me with other cars. Comments? Thanks, C.
ps I have 3-4 secondary air injection codes present and am working through that.
Crispy is offline   Reply With Quote
Old 01-03-2014, 01:34 PM   #2
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

the air injection may cause issues im not how that works on newer vehicles. i do know alot of people have problems with the 4.2'* with carbon build up on the back of the throttle body butterfly, and you have to take it off and clean it real good. drive by wire vehicles dont have separate idle circuits/valves so they are very sensitive to carbon in the tb at idle especially
jwfirebird is offline   Reply With Quote
Old 01-03-2014, 02:06 PM   #3
Senior Member

Posts like a Camaro
 
Join Date: Aug 2013
Location: Northern California
Posts: 1,014
Thanked 164 Times in 130 Posts
75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold
Default

Sounds like it had a flood issue and needed to go into clean out mode. Could be a leaky injector nozzle.
75 racer is offline   Reply With Quote
Old 01-03-2014, 05:03 PM   #4
Junior Member
Thread Starter
 
Join Date: Dec 2013
Location: Lake George
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Crispy is on a distinguished road
Default

jwfb, I will clean the tb as I have seen this mentioned. Racer, does this fuel injection have a "7th" cold start nozzle? I've had cars with a cold start nozzle separate from the cylinder injectors. I will clean first, work through my Air Injection issues and go from there. Thanks, C.
Crispy is offline   Reply With Quote
Old 01-03-2014, 05:09 PM   #5
Senior Member

Posts like a Camaro
 
Join Date: Aug 2013
Location: Northern California
Posts: 1,014
Thanked 164 Times in 130 Posts
75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold
Default

No it doesn't have a cold start injector like the Toyota.
75 racer is offline   Reply With Quote
Old 01-03-2014, 05:15 PM   #6
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

I'm kinda curious how he got it started to begin with when he had it "floored" while starting. Aren't GM'* programmed to turn OFF the injectors when the PCM see'* 90% or better TPS while cranking? Or what GM calls, "clear flood mode".
Mike is offline   Reply With Quote
Old 01-03-2014, 05:17 PM   #7
Senior Member

Posts like a Camaro
 
Join Date: Aug 2013
Location: Northern California
Posts: 1,014
Thanked 164 Times in 130 Posts
75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold
Default

That is why I think it was flooded.
75 racer is offline   Reply With Quote
Old 01-03-2014, 05:28 PM   #8
Senior Member

Posts like a Camaro
 
Join Date: Aug 2013
Location: Northern California
Posts: 1,014
Thanked 164 Times in 130 Posts
75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold75 racer is a splendid one to behold
Default

Things that can cause a flooded condition on a fuel injected engine are leaky injectors, ruptured fuel pressure regulator or a bad or shorted engine temp sensor or even a bad mass air flow sensor. It could of been a fluke thing. My wife'* SRX had flooded on me twice in the 5 years we have owned it and it doesn't set any codes when it does it.
75 racer is offline   Reply With Quote
Old 01-04-2014, 11:18 PM   #9
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

i think its something to do with the dbw throttles because as the carbon builds up the tiny air gap gets blocked, that will be over rich and no air without the iac like the older cars had. and you have to open the throttle some before it will start
jwfirebird is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Brake pressure problem. Brake pedal travels to floor chilump 1992-1999 9 11-02-2006 11:37 AM
Engine light flashes then stays on while pedal to the floor. asonofabeach69 1992-1999 11 11-03-2005 03:27 PM
brake pedal...to the floor? jayare627 2000-2005 5 12-07-2004 09:28 AM
cold start problems and bad brake pedal feel greenbonnie 1992-1999 8 11-24-2004 12:57 AM
Gas pedal, brake pedal position younghelio 1992-1999 1 03-19-2004 12:10 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:37 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.