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Author Topic:   Holley Questions
SundanceKid
Gearhead

Posts: 1137
From: UT
Registered: Feb 2001

posted 04-11-2003 03:12 AM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
I installed a Holley 350 cfm 2brl on my Jeep It has an Adjust-a-Jet kit and I used a 2 step power valve instead of the three step. Other then that it was a stock boring old rebuild.

The problems I've had with it are; stumble on accel when cold, the choke either open too fast or too slow (still can't find a happy medium.) I've pretty much taken care of those issues. I had the float level and the jet choice dead on since I bolted it on in january.

I still have a problem I have not been able to solve. After driveing the Jeep for a while, parking for a few minutes, then driving once again. I have serious stumbles and Hesitation. From idle, part throttle and cruise but WOT is ok. I think I have vapor lock going on? The only problem is it does this even in freezing temperatures!

Do you think that vapor lock is the problem or do you think I have tuning issues still? The Jeep runs like a million bucks till I park and sit, and no amount of driving after cures it till the engine is cold again.

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Moneymaker
Administrator

Posts: 21725
From: Lyons, IL, USA
Registered: May 99

posted 04-11-2003 09:30 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Two things.
1)Are you using any ported vaccum switches for your vaccum advance?
2)Next tiem you park it, before you start it back up, pull the air cleaner and check the inside of the venturi to see if it is wet.

------------------
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,&'03
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!"
www.moneymakerracing.com

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SundanceKid
Gearhead

Posts: 1137
From: UT
Registered: Feb 2001

posted 04-11-2003 12:22 PM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
Alex, I am using the port on the side of the metering block. I bypassed the computer and it now uses a duraspark box and a regular jeep electronic distributor with a large 82 Ford truck cap and rotor.

I will check for the fuel wetness, If I remember correctly it was wet when I looked at it before, I remember because it was wet above the accel pump squirters which I thought was wierd?

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SundanceKid
Gearhead

Posts: 1137
From: UT
Registered: Feb 2001

posted 04-11-2003 12:23 PM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
Thanks Alex for your help!

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SundanceKid
Gearhead

Posts: 1137
From: UT
Registered: Feb 2001

posted 04-12-2003 03:10 AM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
Alex, drove the jeep to work, pulled the cover looked in the bores dry as a drunk on Mormon sunday. Drove to Ihop for lunch, the same.

I will drive it tomarrow around town to see if it will do it, then I will check it again. I forgot to mention that is is fairly intermitent occurs once every week, week and a half. So far each time there was no common temp.

Also I have to press the gas pedal to get the jeep to start every time I start it. All my other carbs I've had only need this the first time for the day or only after sitting a while.

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Moneymaker
Administrator

Posts: 21725
From: Lyons, IL, USA
Registered: May 99

posted 04-12-2003 10:59 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Is it an electric choke?

------------------
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,&'03
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!"
www.moneymakerracing.com

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SundanceKid
Gearhead

Posts: 1137
From: UT
Registered: Feb 2001

posted 04-12-2003 11:34 PM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
Yes, it's an electric choke. I drove it all day to day. Alot of stopping and restarting. And of course it didn't complain all day long.

I tried to start it without pressing the gas pedal. I have to crank longer but it will start. Acts like a cold engine without a choke even when it's warm. once it runs for a few seconds it's ok. Not a big deal.

I'm gonna pull the plugs tomarrow and see what they look like.

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Moneymaker
Administrator

Posts: 21725
From: Lyons, IL, USA
Registered: May 99

posted 04-12-2003 11:42 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I wonder if your power source for the choke is constant 12v or not?

------------------
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,&'03
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!"
www.moneymakerracing.com

IP: Logged

SundanceKid
Gearhead

Posts: 1137
From: UT
Registered: Feb 2001

posted 04-13-2003 09:05 PM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
Drove it around again today. It hesitated after about the third stop I made. I popped the hood and looked in the bores and the throttle plates were wet. The bores were wet above the accel pump squirters as well. Sure sign the carb is loading up. Usualy you can drive and clear it out. Can't seem to get this carb to clear out though. I tried leaning it out but then it runs like crap and I know I'm too lean. Power valve maybe? I live at 4000-4500 elv. I used a 6.5 power valve. The choke is opening fine and stays open. I've managed to tune the choke a little closer to right (raised fast idle 500 rpm) and the accel pump is perfect now. Maybe I can take it down in half jet increments?

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SundanceKid
Gearhead

Posts: 1137
From: UT
Registered: Feb 2001

posted 04-15-2003 03:06 AM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
I took it down a jet size (aprox) Drove it today and it gave me no problems. Seems to run ok leaner.
I felt I had the right jet size dialed in, no unburned fuel smell or black smoke when I get on it? runs good under load, no bogs or backfires ect.
I will have to drive it for a few days to see if it does it again.
I just can't figure why it only does this under the warm stop start situation and runs great otherwise?

I've been messing with this thing since january, seems just when I get everything dialed in it desides to up and change on me!

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