• 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Just changed intake manifold..
#1
I just changed the intake manifold (from Torker II to an air gap). Now, when it's idling, if I quickly blip the throttle, it surged then revs up. It has a lumpy cam and I'm having a difficult time figuring if the is a vacuum leak or a tuning issue.. And ideas?
  Reply
#2
What was your idle vacuum before and now after the swap?

Mike
__________________________________
Black 1985 GT
Yellow 1973 Mustang Mach 1
Black 2012 5.0 GT, 6-speed, Brembo brakes, 3.73's
Wimbledon White 1966 F-100 Shortbed Styleside, 390ci, Tremec 3550, FiTech EFI
  Reply
#3
.
disconnect and plug your distributor vacuum advance and check it and leave it plugged.

plug the pcv and see if that helps . . make sure the pcv hose is not loose on the carb.

make sure the throttle isn't sticking.

check for air leaks with flammable brake cleaner and the long nozzle by spraying gently . . check the intake at the heads also.
  Reply
#4
One symptom of a manifold vacuum leak (or any other major vacuum leak) is engine wanting to stall when (foot on brake) shifting into reverse or drive at idle (+/- 700 rpm).
  Reply
#5
cazsper,

Do you have a Vaccum Tester in your tool box? A Mustang owners best friend!

INNOVA 3620 Vacuum/Carburetor Fuel Pressure Tester

Helps to identify and diagnose system vacuum leaks and problems in the engine, and the various vacuum-operated motors and accessories


http://www.amazon.com/gp/product/B000EW0...i=15729801


mustang7173
  Reply
#6
cazsper;245494 Wrote:I just changed the intake manifold (from Torker II to an air gap). Now, when it's idling, if I quickly blip the throttle, it surged then revs up. It has a lumpy cam and I'm having a difficult time figuring if the is a vacuum leak or a tuning issue.. And ideas?

Is the accelerator pump lever properly adjusted? What is the accelerator pump discharge nozzle size? Chuck
  Reply
#7
make sure to look for leaks around the intake sometimes they don;t sit right you could have a vaccum leak there.

DRIVE IT LIKE YOU STOLE IT*****KEEP YOUR FOOT ON THE PEDAL

Ron

1972 mustang convertible
2005 mustang convertible
1999 mustang convertible white (sold)
1994 mustang convertible white (sold)
2008 ford edge copper
2006 cadillac cts radaint bronze
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  New fuel line after intake and carb change. klinton994 3 112 6 hours ago
Last Post: c9zx
  Looking for 351cleveland Edlebrock SVO intake mikeyhunts 21 481 05-12-2019, 08:21 AM
Last Post: Hemikiller
  Intake alignment dowel removal help Phats 5 210 04-15-2019, 01:36 PM
Last Post: Jeff73Mach1
  Intake sucking air and not in a good way! scgamecock 15 436 03-24-2019, 10:47 AM
Last Post: scgamecock
  RAM AIR - manifold and distributor dfayette 6 357 03-10-2019, 12:48 PM
Last Post: jpaz
  Intake valley pan, reuse it??? scgamecock 12 829 03-08-2019, 12:27 AM
Last Post: Spike Morelli
  Are these the right gaskets for head and intake? scgamecock 4 208 02-20-2019, 11:34 AM
Last Post: Carolina_Mountain_Mustangs
  1971 351C 2V Intake and carb question. turtle5353 42 1,654 01-12-2019, 09:13 AM
Last Post: Ron Tanzi



Users browsing this thread: 1 Guest(s)