Runs Rough when Cold

New forum member - engine runs rough / surges when cold

2015 sx-l with 27K miles and so far has been a great purchase, however, when the engine is cold, the engine bucks/surges at highway speeds till warm.

Rough idle only in cold weather? Please help | Chevy Tahoe Forum

Full Access Member ... Intake gasket...mine went bad when my motor was stock. Sounded like it was cammed.. the cold weather makes the gasket hard ...

Rough idle on some cold starts - Toyota 4Runner Forum

Site Navigation ... A leaking injector would cause an extended crank due to the fuel pressure bleeding down overnight. When the engine starts it ...

240 - hard cold starts, rough idle, then it's fine? | Turbobricks

New member ... It sure is easy to prime the pumps a few times and see if there is a difference. It could also be your coolant temp sensor. If the ...

Runs rough when cold but ok when warmed up | Scion xB Forum

Do you have a cel (check engine light) showing on the dash? Kinda sounds like the o2 sensor isn't telling the computer to go into Closed Loop ...

Rough idle on cold start with shaking / surging

The shaking happens on a cold start, when in R or D but not P or N. I can clear it by revving the engine or just letting it warm up.

Rough idle when engine's cold. | The Ranger Station

The IAC(idle air control) valve is how the computer sets the idle, it is located on the upper intake. These get dirty and computer can't set ...

Where would you start? Runs rough when cold/great when warm

The car acts like it is timed incorrectly (popping, giving it gas with no response, etc.) when it is cold, but not when warm.

Rough idle when cold. - DODGE RAM FORUM

A rough idle can only be a few things. Plugs, TPS, MAF, IAC, Inject, or Coil Pack. A bad Oxygen sensor can trigger the engine to over adjust and cause a rough ...

Engine runs rough when cold - Xoutpost.com

It sounds a lot like the well known intermediate levers issue. Even though the symptoms, (misfires and rough idling at cold engine start), seems ...

Rough idle when cold then smooth when warm - MBWorld.org Forums

5.5l engine having a rough idle when it's cold? my problem- starts up good and strong but when idle drops to 600-650 it is very shaky and misfiring.

help resolve rough idle during cold starts - BMW M5 Forum

This only happens when outside temps are below 22ish deg. C /75deg. F. The colder it is the rougher it runs during startup, and longer it takes to stabalize.

Running rough at cold start | Boating Forum

It runs very rough at initial start up, in our 40 degree temps. I found that the choke plate is in the completely closed position until the engine is running ...

Engine runs rough after start with cold outside air temperatures.

Carburated engines have a primer, which when very cold required more pups and if i remember correctly required more prime after startup on cold ...

Runs rough at startup when cold - Bronco6G

Well-Known Member ... It does seem to idle a bit rough for about the first minute on a cold start. You can hear it. You can feel it in the ...

very rough running when cold | VW Vortex - Volkswagen Forum

I recently developed this issue where after the car sits for a while (and the engine cools down) it will start but struggle to keep going.

cold start rough idle | Chevy Silverado and GMC Sierra Forum

Your engine could be running lean when cold due to a vac leak. Once the engine warms up and the PCM goes into closed loop, the lean condition is ...

Very rough idle at cold start - Jaguar Forums

It idles extremely rough on "fast idle" around 1350 rpm. Sometimes the tach hunts around for a minute around 1350 rpm then the idle drops to 650 rpm but it is ...

Running rough at cold start, is this "normal"

Cold start idle is around 1400 RPM's and works it's way down to about 700RPM's within a 5 minute period as the engine warms. Car seems to have ...

Very Rough Idle When Cold - Harley Davidson Forums

It sounds like the engine is galluping, idles very rough. Hard to explain, but after 2-3 minutes when the engine warms up the idle and engine will smooth out ...