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Author Topic:   Idle problem when cruising from stoplight to stoplight
rockafellz
Gearhead

Posts: 1291
From: San Lorenzo, CA, USA
Registered: Aug 2001

posted 12-03-2002 03:01 PM     Click Here to See the Profile for rockafellz   Click Here to Email rockafellz     Edit/Delete Message   Reply w/Quote
Hey Fellas,

Been a while since I posted. I was on vacation ALL last week!!

Anyways, went out cruising last week from stoplight to stoplight on one of the main roads. When I would come to a stop, it would idle very low ~500rpm (very lopey and wobbly) , i'd throw it in Park, rev it up and bring it back down to Drive and it would idle fine again ~700-900.

What do you guys think the problem would be? My first educated guess would be the float being to low and possibly emptying out the fuel bowls too fast?!?!? How about fuel pressure possibly? I have an electric fuel pump and when I start the car cold it's at 6.5psi, then when it warmed up and has been driven around the block, it's at 4psi.

Using a Carter hi-flow fuel pump preset to 7psi and 90GPH free flow. It's being regulated by a Holley 803-11 fuel pressure regulator.

Thanks in advance.

Erik

------------------
1966 Ford Mustang 2+2
Mine - Restomod in Progress

1966 Ford Mustang Coupe
Dad's - Original Unrestored

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Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 12-03-2002 04:30 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
It sounds like irregular fuel pressire Erik. It should not vary with an electric pump.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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rockafellz
Gearhead

Posts: 1291
From: San Lorenzo, CA, USA
Registered: Aug 2001

posted 12-03-2002 04:42 PM     Click Here to See the Profile for rockafellz   Click Here to Email rockafellz     Edit/Delete Message   Reply w/Quote
Hey Alex, when should the adjustment of the fuel pressure regulator be made? While it's on in Park or Drive? Or while it's off with the fuel pump on?

Thanks in advance.

Erik

------------------
1966 Ford Mustang 2+2
Mine - Restomod in Progress

1966 Ford Mustang Coupe
Dad's - Original Unrestored

IP: Logged

Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 12-03-2002 05:05 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
In neutral or park with the engine running at normal idle. Afterwards reset the floats.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

IP: Logged

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