Sudden High Idel
Thread Starter
Banned Scam/Spammer
Joined: Aug 2020
Posts: 171
Likes: 52
From: Warren, Mi
Sudden High Idel
Hello Vet Heads
HELP!!!! My 1979 is suddenly idling at 1800 rpm during choke warm up and is running riiiiich!!!
I was running good prior to this.... And I have done the following before this issue showed its ugly face. And it ran fine after it was comolete
New Radiator -(summer was coming and wanted piece of mind)
165 degree stat.... And it ran fine after
New TVS......because it broke one
Fuel pump..... It was leaking
Rebuilt the Qjet..... Fired right up afterwards
Cap, Rotor, Modual
Plugs Wires
Timing is 8 before TDC.... Sad to say
Everthing else checks out
Pvc
Egr
Vac Adv can
Dist Weights and Bushing
No vacuum leaks... Did smoke test
Checked and quadroopled check vac hoses and wires
Choke working
Nothing binding linckage
Likei said it just started racing on choke and static idel
HELP!!!!
HELP!!!! My 1979 is suddenly idling at 1800 rpm during choke warm up and is running riiiiich!!!
I was running good prior to this.... And I have done the following before this issue showed its ugly face. And it ran fine after it was comolete
New Radiator -(summer was coming and wanted piece of mind)
165 degree stat.... And it ran fine after
New TVS......because it broke one
Fuel pump..... It was leaking
Rebuilt the Qjet..... Fired right up afterwards
Cap, Rotor, Modual
Plugs Wires
Timing is 8 before TDC.... Sad to say
Everthing else checks out
Pvc
Egr
Vac Adv can
Dist Weights and Bushing
No vacuum leaks... Did smoke test
Checked and quadroopled check vac hoses and wires
Choke working
Nothing binding linckage
Likei said it just started racing on choke and static idel
HELP!!!!
Team Owner
Joined: Jun 2001
Posts: 23,375
Likes: 1,067
From: Virginia USA
Vacuum leak is what I'd check for first. Check all your vacuum hoses and plugs if you are using them. Get some brake cleaner, run the engine and spray the brake cleaner around the intake and carb. If you idle increases even more you've found the leak. It's a better test that the smoke test.
Last edited by theandies; Jul 20, 2021 at 05:27 PM.
Thread Starter
Banned Scam/Spammer
Joined: Aug 2020
Posts: 171
Likes: 52
From: Warren, Mi
Ok thank you I will try that. However on more thing I neglected to mention.... After I have ran the car for only a few minutes ( because it makes me nervous for it to be racing I won't let it run long) I noticed the secondaries having gasoline moisture on them... Is this normal!!?? Any thoughts
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Float has probably dropped and it is also stuck on fast idle from the choke.....it is supposed to idle high during first start warm up.
If the float drops, it will keep filling the bowl and that fuel has to go somewhere........
If you are not versed in Q-Jets, I recommend sending it out to a pro.....like Lars or Allstate carb.
If you want to tackle it......you can fix it for about $25....but you need to have the right top plate gasket and the right float. It is imperative that the float be set properly.
Jebby
If the float drops, it will keep filling the bowl and that fuel has to go somewhere........
If you are not versed in Q-Jets, I recommend sending it out to a pro.....like Lars or Allstate carb.
If you want to tackle it......you can fix it for about $25....but you need to have the right top plate gasket and the right float. It is imperative that the float be set properly.
Jebby
Last edited by Jebbysan; Jul 21, 2021 at 02:38 PM.
Thread Starter
Banned Scam/Spammer
Joined: Aug 2020
Posts: 171
Likes: 52
From: Warren, Mi
I did rebuild the carb.... and it ran really good afterwards. I know it is supposed to have an increased idel speed of about 1200 rpm.... Which is where if was before. I guess it could be debris causing the float to stick or clog passages.... Although I'm not sure how or why. I quess I will be tearing it apart.... GRRRR!!!
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