Rough Running

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07-31-2008 | 10:07 AM

mjscc1

Thread Starter

1st Gear

Joined: Jul 2008

Posts: 8

Rough Running

2.8 runs very rough when cold. RPM's surge but after about 1-2 minutes smooths out and runs fine. Any ideas.

Thank you

07-31-2008 | 10:42 AM

cartercdad

1st Gear

Joined: Jul 2008

Posts: 9

RE: Rough Running

maybe fuel filter or pressure regulator

07-31-2008 | 11:02 AM

jiggleo

2nd Gear

Joined: Feb 2008

Posts: 562

From: Wine Country, NY

RE: Rough Running

sounds to me like an egr. try not to post the same issue twice in the future.

07-31-2008 | 11:57 AM

mjscc1

Thread Starter

1st Gear

Joined: Jul 2008

Posts: 8

Engine idles rough at cold start

Starting engine cold RPM's surge up and down. Low RPM's runs rough then spike to about 1500 and smooths right out. Drops back down then surges again. After about 60-90 seconds it runs fine and all gages read normal. HELP!!!

07-31-2008 | 11:59 AM

mablo88

Junior Member

Joined: Jul 2008

Posts: 3

RE: Engine idles rough at cold start

I have the same problem on my 2.6. As I understand this is a quite normal issue with the 12v's(if that is what you have?), but i don't know what is causing it.

07-31-2008 | 12:46 PM

hiwords

5th Gear

Joined: Jun 2007

Posts: 7,728

From: noob from NY

RE: Engine idles rough at cold start

seafoam treatment

07-31-2008 | 02:10 PM

mjscc1

Thread Starter

1st Gear

Joined: Jul 2008

Posts: 8

RE: Engine idles rough at cold start

I've used Techron by Chevron in the past. Is that comparible to Seafoam? Thanks

07-31-2008 | 06:34 PM

Tweaked

3rd Gear

Joined: May 2008

Posts: 1,900

From: CT

RE: Engine idles rough at cold start

Quote:

ORIGINAL: mjscc1

Starting engine cold RPM's surge up and down. Low RPM's runs rough then spike to about 1500 and smooths right out. Drops back down then surges again. After about 60-90 seconds it runs fine and all gages read normal. HELP!!!

Any MIL or codes?

Try unplugging the secondary air pump and starting the car cold.