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Need Help With Everything (lol)... Newbie 1984 crossfire

T

toddadam

Guest
Signed up for the crossfire forum?

How many vac hoses are there? and where?
Where would I find this in the manual?
What am I actually listening for? Change it rpm's?

May sound stupid but never done it before..lol.

I do have a hissing sound when I have someone hit the gas while sitting. With our without the filter housing on. I know the hoses that are running around the air cleaner - is that the ones I should check? any others?

Thanks again and I am just going to go ahead and get that flex pipe that runs from the heat stove...

Thanks again

Todd
 

vigman

Motor head!!!!
Joined
Feb 13, 2001
Messages
3,471
Location
Valencia, CA,USA
Corvette
88 Convert ( SOLD ) /1973 coupe 4 speed/1964 Vert!
You need a vac hose map....

This should be in the shop manual...

just make sure that all hoses go somewhere..

Also the cars been running weird for sometime...

Remove the battery ( reset the ECM ) and drive it easy for 20 minutes..

That way the ECM can learn.. and adjust...

Just no extended romping with the check engine light on!
 
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toddadam

Guest
thanks again.

Will try that and read over the manual tonight and see what I can find.

Give it an easy ride tomorrow after clearing everything and see what happens.

Todd
 

green 84

Well-known member
Joined
Apr 23, 2009
Messages
55
Location
Lakewood WA
Corvette
1984 Boston Green Coupe
Howdy Todd

Check any small hose to see if it is hooked up somewhere or plug it, I would check as much as possible with air cleaner on.

Make sure all intake manifold bolts are tight.

Biggest improvement I have had is when I replaced O2 sensor which is located in drivers side exhaust pipe, right in front of the catalytic convertor.
 
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toddadam

Guest
hi guys - didnt get a chance to work on too much today. should be able to check the hoses tomorrow. Thanks again for all your guys help

Todd
 

douglas foster

Well-known member
Joined
Aug 18, 2005
Messages
226
Location
minnesota usa
Corvette
1984 C4 Gold coupe, Z51, 4+3 manual, BBS rims,
father & son

Could ther be some EGR problems?? Good luck
vett4-01.jpg
 

vigman

Motor head!!!!
Joined
Feb 13, 2001
Messages
3,471
Location
Valencia, CA,USA
Corvette
88 Convert ( SOLD ) /1973 coupe 4 speed/1964 Vert!
WOW CLEAN 84!

Todd...

Do you have a mighty vac pump? if not you'll need one!

Its a handy tool to check egr/ vac valves etc,etc

Vig~
 

MusclecarJohn

Well-known member
Joined
Sep 8, 2005
Messages
144
Location
So.Cal
Corvette
'92 arctic white coupe
Todd, another welcome from a former 84 owner :beer
You can make a homemade manometer to balance your TBs, don't really remember how my nephew made one but if you need to know more about the manometer I will ask him to refresh my memory although it's probly on the crossfire forum somwhere anyway
I'll tell ya, after he balanced the throttle body injectors and torqued down the intake and all my 84 ran like a swiss watch
 
Joined
Aug 30, 2002
Messages
1,533
Location
Colorado Springs, CO USA
Corvette
84 Z51 auto R.I.P. 89 black roadster SOLD
Todd, another welcome from a former 84 owner :beer
You can make a homemade manometer to balance your TBs, don't really remember how my nephew made one but if you need to know more about the manometer I will ask him to refresh my memory although it's probly on the crossfire forum somwhere anyway
I'll tell ya, after he balanced the throttle body injectors and torqued down the intake and all my 84 ran like a swiss watch

A water manometer is beyond easy to make....just a U-shaped clear tube attached to a piece of wood. I'll snap a picture of mine sometime today.
 

MusclecarJohn

Well-known member
Joined
Sep 8, 2005
Messages
144
Location
So.Cal
Corvette
'92 arctic white coupe
:beer here's to you Bill for the water manometer info
that will be verrry useful to crossfire owners :upthumbs
 

Schrade

Well-known member
Joined
May 2, 2009
Messages
1,315
Location
Not in CF; BANNED!!!
Corvette
'90 LT 5
Have you done a PROPER vac leak test?

No one got the proper technique for vacuum leak detection... :confused

FIRST; block the pedal, or block the throttle linkage. YOU HAVE TO DO THIS TO GET A STEADY IDLE , around 1,250 rpms, or a little higher. If you don't, you can fish a propane hose, or WD40, or Krylon, or hair spray, or pee, anything, until you need a sweater in Hades, but if the motor is lopin' already from a vacuum leak, you ain't gonna' find any vacuum leak, unless it's so big that Little Jack Horner can stick his thumb in it and pull out a pineapple NOPE.

AFTER you get a steady idle, THEN, you can spray starting fluid everywhere - that's the best detector, because it's vapor pressure is very high - a LITTLE at a time, until you get the SURGE. Follow the vacuum lines to the EVAP cannister too. You might even have to follow the EVAP lines from the EVAP cannister to the gas tank too, but that vac leak will show up as a DTC 32 EGR fault, and won't normally show as loping idle, unless the EVAP cannister has been by-passed (been there, saw that uh-huh).

If you get a surge in a tight spot, and can't tell exactly where it is, light a book of matches, blow out the match heads while they're still burnin', and feed the smoke to the tight spot.

Fear not the starting fluid; you cannot put the can down fast enough and light the matches fast enough to catch the starting fluid, because the vapor pressure is so high.

Bookmark this post YUP.

Wrench Wizard OUT!
 

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