randall729
Rookie
Name : randall r. beard
Age : 71
Location : upper peninsula of michigan (yooper)
Joined : 2015-10-01
Post Count : 13
Merit : 0
 | | Subject: NEW CARB FOR MY 307 I INSTALLED Thu Oct 08, 2015 8:50 pm | |
| I believe the carb is installed right. Car starts and runs fine. Idle seems about right. No dieseling when I shut off. I can't figure out why the car quits when I put it in drive? Then I restart it, put in drive, car quits. It seems to idle perfectly. DOES ANYONE KNOW WHAT'S GOING ON HERE? (Trying to take it out for a test spin with this new carb.) Thanks anyone commenting | |
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deekster_caddy
Master
Name : Derek
Age : 52
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109
| | Subject: Re: NEW CARB FOR MY 307 I INSTALLED Fri Oct 09, 2015 2:38 pm | |
| Sounds like a vacuum leak. Does the base gasket match the carb base exactly? There are many "universal" quadrajet base gaskets, but a lot of the emissions-ridden q-jets had specific base gaskets you need to use.
Try lightly spraying some carb cleaner around the base of the carb, see if you get the engine to stumble or rev when you do this, it will indicate a vacuum leak. | |
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albertj
Master
Name :
Location : Finger Lakes of New York State
Joined : 2007-05-31
Post Count : 8685
Merit : 181
| | Subject: Re: NEW CARB FOR MY 307 I INSTALLED Fri Oct 09, 2015 3:37 pm | |
| - deekster_caddy wrote:
- Sounds like a vacuum leak. Does the base gasket match the carb base exactly? There are many "universal" quadrajet base gaskets, but a lot of the emissions-ridden q-jets had specific base gaskets you need to use.
Try lightly spraying some carb cleaner around the base of the carb, see if you get the engine to stumble or rev when you do this, it will indicate a vacuum leak. You should also check the timing and the vacuum advance. You may not have a vac leak per se but if the advance isn't working it won't run right. | |
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randall729
Rookie
Name : randall r. beard
Age : 71
Location : upper peninsula of michigan (yooper)
Joined : 2015-10-01
Post Count : 13
Merit : 0
| | Subject: Re: NEW CARB FOR MY 307 I INSTALLED Mon Nov 23, 2015 8:37 pm | |
| My car now runs fine. The problem was a hose and clamps in a fuel line splice. I plan to drive the car (307 engine) auto 4 speed, about285 miles trip. WOULD ANYONE KNOW POSSIBLY THE GAS MILIAGE I MIGHT GET FOR THE TRIP? I AM TRYING TO FIGURE OUT HOW MANY GALLONS OF GAS I MAY HAVE TO BUY? | |
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deekster_caddy
Master
Name : Derek
Age : 52
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109
| | Subject: Re: NEW CARB FOR MY 307 I INSTALLED Fri Nov 27, 2015 5:14 pm | |
| I'll take a wild guess for you based on another V8 powered Buick. I just pulled a car trailer with my 1973 Buick LeSabre 400 miles loaded and 400 miles with an empty trailer and averaged 10 MPG for the trip. That car has a heavily modified 455. Hopefully the 307 gets better gas milage than the 455, so a good guess is 15 MPG. If you get 15 MPG, you would use 20 gallons to go 300 miles (300/15=20). If it's running poorly for other reasons, you may get worse milage. If you get 10 MPG, you would use 30 gallons. | |
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randall729
Rookie
Name : randall r. beard
Age : 71
Location : upper peninsula of michigan (yooper)
Joined : 2015-10-01
Post Count : 13
Merit : 0
| | Subject: Re: NEW CARB FOR MY 307 I INSTALLED Fri Nov 27, 2015 8:10 pm | |
| 15 MPG seems about right. Hoping for better with new carb. | |
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| | Subject: Re: NEW CARB FOR MY 307 I INSTALLED | |
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