This is topic Starting to get rough idle in forum Tech Talk at Northern California Ford Owners  .


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Posted by 03SVTPower (Member # 518) on :
 
Started noticing a little bit of a rough idle the other day when i started the car up. I let'er warm up for a few minutes and noticed it.

i do need to replace my cats again and have an exhaust leak, could this contribute to my slight rough idle? [Frown]
 
Posted by corpsedub (Member # 6401) on :
 
could be the FRPS starting to go.if you dont have a spare, might be a good time to order one and have it just incase. it's a good thing to have handy in the glove.
 
Posted by 92stangLX (Member # 3252) on :
 
When was the last time you tuned the car up? Any engine codes?

EDIT: I would fix the exhuast leak.

[ September 10, 2007, 12:49 PM: Message edited by: 92stangLX ]
 
Posted by 03SVTPower (Member # 518) on :
 
quote:
Originally posted by 92stangLX:
When was the last time you tuned the car up? Any engine codes?

EDIT: I would fix the exhuast leak.

Has about 6500 miles on the motor since the rebuild. [Confused]
 
Posted by 03SVTPower (Member # 518) on :
 
quote:
Originally posted by corpsedub:
could be the FRPS starting to go.if you dont have a spare, might be a good time to order one and have it just incase. it's a good thing to have handy in the glove.

What is the FRPS?
 
Posted by corpsedub (Member # 6401) on :
 
quote:
Originally posted by 03SVTPower:
quote:
Originally posted by corpsedub:
could be the FRPS starting to go.if you dont have a spare, might be a good time to order one and have it just incase. it's a good thing to have handy in the glove.

What is the FRPS?
Fuel Rail Pressure Sensor
 
Posted by 93PONY (Member # 60) on :
 
FRPS failures are not uncomon.
Exhaust leaks near/upstream of the O2 sensors will cause the O2's to read lean, & the computer will richen the mixture which can make a rough idle.

Also check for vacuum leaks. Sometimes under boost a line will pop off.
 




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