sencondaries not opening??

[jhell1861]

i have a 1990 sho mtx and i let it idle and then rev it up past 4,000 rpm and they dont move??? but if i hold the 2 lines in the back that connect to the cannister then then open? i have no clue

i need help please

-Jeff

 

[NiNeTy Fo SHO]

Do they move from when the car is off compared to after the car is started?

They are probably open all the time. A vacuum is created when the car is started to "suck" them shut. When you hit 4 grand, the vacuum releases and they open. If you have a vac. leak, they will never closed as no vac. is created.

 

[jhell1861]

when the car is off the are down and once i start the car they move up but then i rev it up and they dont do ne thing? what could it be?

 

[sho_me92]

when the car is at idle and then you rev it up they usally dont open up unless you rev it up around 4000 rpm and then start pumping the gas thats the only way iv found that they will open when the car is stoped ...try driveing it and take it over 4000 and see if you hear a sound differnce...if you take your silicer cone out you will be able to hear it better

 

[NiNeTy Fo SHO]

1: how do you know if you revved it past 4 grand? (If in the car, you probably cant hear them open.) If under the hood, are you sure it hit 4 grand?

When you sqeeze the hose, ur cutting the vacuum off and its letting the secondaries open.

Sit inside and make sure you hit 4500-5000 when revving and have someone sit and watch the secondaries to open. (make sure car is not in gear...if someone is hurt, I am not liable)

 

[jhell1861]

i was in the car and reved it to 5,000 rpm and i had someone watch them they dont work ????

 

[BeautifulDisasterSho]

Make sure the secondary actuator (cannistor) is being powered. Check the connection and make sure its clean and tight.

 

[jhell1861]

it is and i have no idea what it could be its slow in first gear till 4,000 then its ok but its real real slow till 4,000 only in 1st gear too?

 

[NiNeTy Fo SHO]

Its probably slow in the other gears as well...you just dont notice it.

Whatever tells the canister to let the vacuum go at 4 grand evidently isnt doing its job or there is a bad connection somewhere.