Warm up

[clintusaf]

Hey guys,

been a while since I've been on here. Anyways, I've noticed that when I start my truck in the morning, after about two or three minutes it starts idling up and down. I had a buddy that had a fox body mustang that had a bigger cam in it and it sounded alot like this does. Any ideas? Just wondering if this is normal or if anybody else's on here does the same thing?

 

[BIG JOE]

When temps are cold,cold.. the high idle will continue to operate, off and on, until All the temp sensors (oil, coolant, intake air etc.) tell the PCM that engine is at or near operating temperature.

When you did the Donaldson set up, did you re-install that temp sensor that was in the Air Filter Box ?

Joe

 

[clintusaf]

I did reinstall the air temp sensor when I switched to the donaldson filter. Also, I should have stated this before. It does this without out the high idle only.

 

[bigrigr]

Could it be a dirty air filter? Almost sound like it fighting for breath?

 

[clintusaf]

The air filter is only a few months old. It did it when I first installed it too.

 

[bigrigr]

Hmmmm,what about the fuel filter? How cold does it get there? Glow plugs working?

 

[clintusaf]

It doesn't really get that cold here. It only drops below freezing once or twice a year. It does it even when it's up in the 60s and 70s as well.

 

[iracemine]

how about correlation to a near empty gas tank?

 

[clintusaf]

I never let it get below a half tank

 

[bigrigr]

Have you replaced the fuel filter?