dies at cold start up unless throttle applied


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Tierod end change caused some kind of leak

Hello so I just took my car to the nearb...

2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes

When I bought this car in summer 2023, a...

Grounding Cable, 2017 Jeep Renegade Trailhawk

The Cable that connects my negative batt...

Rough Idle (Found new thing)

Hi everyone. First of all sorry for bad ...

equipment

hey yall. im a first year engineering st...

HELP

I have a 1956 1/2 ton panel truck, 69 35...

Howdy

    Just wanted to s...

ABS/Tractiob/Brake Lights on But No DTCs

Hello all, Recently while driving m...

Chevy strut replacement

I'm trying to get a sensor of some kind ...

2020 suburban new transmission and issues after install

recently had the transmission fail at 11...

dies at cold start up unless throttle applied

Sign up here!

Email This Post

Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

dmartin
New User

Feb 18, 2017, 6:53 PM

Post #1 of 6 (1539 views)

dies at cold start up unless throttle applied	Sign In

2004 Pontiac grand prix gt always dies at cold engine start butt after I apply throttle it will stay running. I only apply light throttle at cold start up and it runs fine even if I let off the throttle.
it only does this at cold start and after warm up it will not do it again until cool down

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 18, 2017, 7:49 PM

Post #2 of 6 (1527 views)

Re: dies at cold start up unless throttle applied	Sign In

Get codes read and post the #(s) that come up. There has to be one or more even if CEL isn't lit to help peg this down,

T

dmartin
New User

Feb 18, 2017, 7:56 PM

Post #3 of 6 (1523 views)

Re: dies at cold start up unless throttle applied	Sign In

no codes present at all

dmartin
New User

Feb 18, 2017, 8:26 PM

Post #4 of 6 (1517 views)

Re: dies at cold start up unless throttle applied	Sign In

the history shows a p0441 but no active codes

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 19, 2017, 2:41 AM

Post #5 of 6 (1496 views)

Re: dies at cold start up unless throttle applied	Sign In

That's a good start for things to check in the evaporative emission system meant to "purge" back any unburned fuel vapor by a purge valve. Since you seem to beat this by holding throttle open which is just really allowing more air flow that otherwise is self adjusted I'd first look for all evap hoses, canister itself and any vacuum leaks that seem to seal up and behave when warmer at all so at or around engine rather than at fuel tank.

The behavior isn't normal may or may not need part but rather check. It's probably a great time to fully clean up throttle body and IAC valve done by spraying it first with carb cleaner and actually a real used tooth brush (HT we call him has an endless supply of these - inside joke) which could only help and be done with this issue,

T

kev2
Veteran
kev2 profile image

Feb 19, 2017, 8:08 AM

Post #6 of 6 (1480 views)

Re: dies at cold start up unless throttle applied	Sign In

OK - you did recently scan for codes only the p0441.
Will your scanner read live data? ECT, FT,s, O2 Volts, MAP/MAF.
I often check fuel pressure when seeing drivability and no codes, pressure and leak down* with KOEO.

*opening throttle at start suggests 'flooding'

Email This Post

Search for (options) Privacy Sitemap