'73 LeMans 350 Really rough start up Stalls if put in gear If I let it warm up for 4 to 5 mins, runs and idles great Are these indicators of a vacuum leak?

Asked by May 17, 2016 at 09:02 AM about the 1973 Pontiac Le Mans

Question type: Maintenance & Repair

5 Answers

5,075

Probably not a vac leak or it would run rough all the time. I had one of these with a 2 bbl carb and it had a kick-up solenoid attached to the driver's side of the carb. It would kick up the idle RPMs when the engine was cold and then shut off after the engine reached operating temp. If this solenoid is not working, this would cause the symptom you are seeing.

1 of 1 people found this helpful.

Hmmm.... Thanks for the response brother. It's interesting because you're the second person to suggest the exact same remedy which makes perfect sense. Here's my problem. It's single bbl. & according to title & my research has 11,000 original miles on it. Perhaps there is the same solenoid only located off the carb. Wondering if single bbl. was standard & 2 bbl. was a common modification or option?

5,075

It was a standard item on these engines. It pushed against the throttle linkage on the side of the carb to keep the engine RPM's up during warm up. I put in a cut out switch in the dash so I could control when it actuated but some other owner may have just removed yours.

1 of 1 people found this helpful.

Thanks for the knowledge.Turns out its on the passenger side of the single barrel carb. Hooks into linkage on butterfly valve which was sticking just before full open. Hit all the linkages with some W-D & seems to have solved the problem, Now on to gaskets & water pump replacement. I use to enjoy this work......Thanks again for the help

5,075

You are welcome. Glad my memory of my car from 40+ years ago was a help! This was mine back in '73. Have fun with yours.

Your Answer

Le Mans

Looking for a Used Le Mans in your area?

CarGurus has 19 nationwide Le Mans listings and the tools to find you a great deal.

ZIP:

Pontiac Le Mans Experts

  • #1
    Rucko
    Reputation
    440
  • #2
    Js08016
    Reputation
    190
  • #3
    Daniel Perron
    Reputation
    160
View All

Related Models For Sale

Used Pontiac Firebird
9 Great Deals out of 810 listings starting at $1,900
Used Pontiac GTO
11 Great Deals out of 462 listings starting at $5,950
Used Chevrolet Camaro
405 Great Deals out of 31,587 listings starting at $2,395
Used Chevrolet Impala
591 Great Deals out of 34,520 listings starting at $1,250
Used Ford Mustang
746 Great Deals out of 42,169 listings starting at $1,300
Used Pontiac Grand Prix
38 Great Deals out of 2,762 listings starting at $1,200
Used Dodge Challenger
252 Great Deals out of 21,279 listings starting at $6,999
Used Chevrolet Corvette
253 Great Deals out of 22,069 listings starting at $2,500
Used Dodge Charger
422 Great Deals out of 27,720 listings starting at $1,000
Used Pontiac Bonneville
3 Great Deals out of 524 listings starting at $1,799
Used Chevrolet Monte Carlo
14 Great Deals out of 1,369 listings starting at $995
Used Dodge Dart
219 Great Deals out of 8,083 listings starting at $4,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.