Hi there...need some advice on my carb...

Have a 87-Camaro with a 305CCC-qadrajet on it...Think it is model E4ME..
Have electric choke.......

Have had some troubles on my car for over a year now...Every morning when I start my car my engine stalls...Just idle's to low...
What I have configured is that my electric choke is probably broken...

But how can I fix this??..Can I buy a new electric choke??...
Or is there some small adjustments that could me made??

When my engine is running warm my idle is just fine....
But when i start my car after it has cooled down for 30minutes but it is FAR away from COLD I also have troubles with my idle in park...very low idle...

Please help me with this one...I'm no carb expert...
I also have emission system on my car...Could that have anything to do about my idle???

 

There are a couple of things that could be going on, and they aren't too complicated, typically.

First, when the engine is cold, open the hood and take the air cleaner off. Open the throttle a little bit, and watch if the choke butterfly snaps shut. If it doesn't, that means either the mechanism for the choke is gummed up, or the choke thermostat is shot. While holding the throttle open a little, move the choke mechanism back and forth - if it moves freely, then it's not gummed up and you have a thermostat problem. If it doesn't move freely, get some spray carburetor cleaner and spray it around.

If the butterfly does snap shut, it means you need to adjust the fast idle speed. Check the sticky at the top of this forum about q-jet repairs, the adjustment procedure is covered there.

The choke thermostat is notched so that it only fits in one place, so adjusting it to compensate for a weak spring isn't practical.

 

ok...I would try that...I ain't 100% sure about how you do this way but what I am sure about is that one morning I took of my air cleaner assembly..
The carburettor (choke port) was closed...

Started up the car and carburettor is still closed...
I warmed up the engine for some minutes and nothing seems to happend...
I don't think it is something about the mechanism cause I'm not missing any pieces.....

One thing that happens when I start the engine is that the vacuum "thing" next to the choke is moving nice forward....When I shut of the engine this one closing it self...Sorry the bad explaining her..Do you understand what I mean???

 

Yes, understand what you are saying.

If you checked for the choke butterfly closing (and it has to completely close, not just mostly close) after this problem came up, then you either still have a gummy mechanism (not likely), or need to adjust the fast idle speed (doesn't normally get out of adjustment).

It sounds like your vacuum choke pull-off is working, although it could also be improperly adjusted (but typically doesn't get out of adjustment, either).

 

Ok...good you understand me....Well so what you are saying is that it is one of those problems above but it is not likely that???
hmmm...I am getting confused...
But you don't think my vacuum leak in to the intake manifold as written on the other thread can cause my ECM to made my engine idle roughly???

 

Sorry, I didn't connect the dots. I read so many posts each day, I don't always associate them when someone posts about more than one problem (and especially when they are posted on different forums).

Yes, it could be your vacuum leak causing your problem. All you really need is to connect the hose to the thermal vacuum switch, so you don't have to keep the rubber connector that has both vacuum lines in it as long as you get the right line going to the right nipple on the switch.

 

OK...thanks for the quick response anyway
You see I don't think it would be so easy to connect the hose because it is broken away...the hose is so old and crappy that it breaks almost just when you touch it...Do you have any idea how I can get new hoses with a switch??

I have found this part at this site: http://www.rockauto.com/dbphp/mfr,ST...+Control+Relay

I am not so very good with english names on the part though I am from Norway, so it's not my main language...Here I would call that part "the thing2 lol...

But what I was going to tell you is that these hoses goes to a Vacuum Switch named: Ported Vacuum Switch (like you said)...
My Vacuum switch is perfectly ok but do you know where I could buy the "Top" of the Vacuum Switch??...That is a black piece that fits right on the Switch with 2 hoses connected to it...It would be best to replace the hole top...

Cause I am missing almost 5inches of my hose....

Any idea??

 

You have to buy the whole thermal vacuum switch if the plastic nipples are broken off. But, it doesn't look like that to me from your pictures.

Some small rubber hose that fits over the plastic tube is what I was thinking. The rubber part that has both plastic tubes going to it is not necessary, just use rubber hose to attach the plastic tubes to the TVS.

 

Ok...but there is a cap on top of the switch where the 2 hoses are connected in...Think they are originally glued or something cause I can't get the other one out...So I was thinking of buying a new vacuum switch cap with the hoses connected to it...But i can't find anywhere to buy it...





Here is some pictures of the cap with the remaining hose connected..

 

That probably has not been available for years.

You can just run small rubber vacuum hose between the TVS and where those plastic lines go to.

 

ok...any idea of where I could find vacuum hoses on internet???

 

Wow, no parts stores in Norway?

 

I almost don't buy anything to my Camaro here in Norway cause it is just TOOOO expensive...Just look at something as easy as a O2 sensor..
Bought myself a new one here in norway... 120bucks...
In US I could by the same for: 25bucks.... and mayby 10-20 bucks in shipping...

Under the half of the prize and that's is also with the shipping...
Do you now understand what i mean??...hehe
If you want to buy a OK condition 88 IROC-Z here you have to pay about:
30,000$

So american car parts is WAY to expensive here...

 

It does not have to be American. Any vacuum hose that is close to the size and will fit over the plastic tube or the nipple will work. Parts stores should carry universal vacuum hose, that is all you need.

 

OK...thanks anyway....Yeah I guess Universal vacuum hoses will fit over the nipples...But comparing to the old system the hoses is fitting inside a hole....But today I fixed it with some hose I had lying in the garage..
So now there is no vacuum leak so I reset my ECM and drove for a while but still nothing had came up...

But...The problem is here anyway about the choke....Have big troubles idling on cold engine...The engine start after just 1 crank...The RPM goes up to 750RPM mayby up to 900RPM and after 5seconds it fails...Engine stalls..
Any idea???

 

The choke pull-off may be opening the choke too far. And, the high idle may not be set high enough.

 

how do I adjust the high idle???...And can I adjust the choke pull-off???

 

That green weight lever thing on the passenger side is the fast idle cam. When it is up, there is a screw that holds the primary throttle blades open more (you have to open the throttle slightly to get it to engage). That screw is what you adjust for the fast idle.

The choke pull-off has a screw on it as well. It adjusts a tab that opens the choke butterfly slightly when the pull-off has vacuum on it. Turn that screw one way, the butterfly opens more - turn it the other way, and the butterfly opens less.

 

ok..thanks...I will try that tomorrow...Now it is the middle of the night here in Norway...