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Username Post: 8.1 liter running rough then clears up        (Topic#358299)
ShovelayNut 
Senior Member
Posts: 157
ShovelayNut
Loc: Ellenboro, NC USA
Reg: 04-03-02
10-03-19 05:46 AM - Post#2776977    

I have a 2001 8.1 that runs good most of the time but sometimes when starting cold it runs very rough and is real weak. If I turn it off and restart it will clear up and run smooth. Is this a common problem with this engine?

See the USA in your Shovelay


 




Shepherd 
Frequent Contributor
Posts: 1863

Loc: Lake George, NY
Reg: 11-11-15
10-03-19 07:25 AM - Post#2776987    
    In response to ShovelayNut

Any check engine lite?



 
Mel Foye 
*VIP* Founding Member
Posts: 4905
Mel Foye
Reg: 09-29-00
10-03-19 02:34 PM - Post#2777023    
    In response to ShovelayNut

Does this engine have an extra injector for start up?



 
Shepherd 
Frequent Contributor
Posts: 1863

Loc: Lake George, NY
Reg: 11-11-15
10-03-19 02:58 PM - Post#2777026    
    In response to Mel Foye

No, just pcm controlled injector enrichment.



 
Rick_L 
Honored Member
Posts: 27657
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
10-04-19 08:22 AM - Post#2777073    
    In response to ShovelayNut

Possibly a coolant temperature sensor problem.

If you could get a real time scanner on it, that would confirm, or else show what the real problem is.



 
ShovelayNut 
Senior Member
Posts: 157
ShovelayNut
Loc: Ellenboro, NC USA
Reg: 04-03-02
10-07-19 05:41 AM - Post#2777245    
    In response to Shepherd

No check engine lights or extra injector but the temp sensor might be it. I went ahead and put two new O2 sensors in (before the cat) because one appeared to one be flaky. Haven't drove it yet. Will definitely check on the temp sensor. Thanks. By the way, while I was under there, I couldn't find any O2 sensors after the cats. Does this vehicle only have two sensors?

See the USA in your Shovelay


Edited by ShovelayNut on 10-07-19 05:46 AM. Reason for edit: No reason given.

 




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