[batman09]

I need alittle help.My engine is running like crap and I can't dial in the edelbrock carb.Here's the situation.Lately my car has been rollarcoasting at idle.I used to have just breathers and the car ran pretty good.I switched over to a pcv setup and since then the motor has been running alittle rough.I tried messing with the carb to no avail.Today I plugged up the vacuum line running to the pcv,turned both ajustment screws all the way down and opened up both 3 full turns counter clock wise(From what I understand this is factory setup...not sure though???).Doing this the car is still running like crap...still rollercoasting???Anyone have any idea what is going on??Is it a vacuum leak?How do I trouble shhot for vacuum leaks besides starter fluid around the base of the carb?Can you engine/edelbrock guru's walk me thru this?Where's paul when you neen him???This is really starting to bug me!!!1 more question....om my edelbrock there are 2 cables hooked up...the top is the throttle...what is the bottom one?How is that supposed to be set up?I pull on it and about 1 inch of cable slack comes out.Is this normal?Thanks for the help guys.
Ps .....its a eddy 1405 manual choke.bm

 

[1bad66ss]

As far as checking for the vacuum leak if you have access to a collage which has a automotive department. They will have a machine they can hook up to a vacuum port and blow smoke through it, the smoke will then come out of the leak. The lower cable your talking about is the transmission kick down.

 

[batman09]

Thanks 1bad66ss.No access to an auto dept.I'm looking for some do it yourself technics.bm

 

[1bad66ss]

I'll look through my engine technology book and see if I can come up with something.

 

[RED67]

batman,,when you converted to PCV did you allow for a crankcase breather in the aircleaner or one breather in the manifold or valve cover?
The PCV must not pull a vacumn on the crankcase, just pull air through the crankcase.
RED67

 

[NIGHTSHADE]

Do it yourself looking for a vac leak would be to spray carb cleaner on the outside surfaces of the carb (While running at idle). Spray it wherever there is a gasket. If the engine reves up you found a leak.

You can also go to a parts store and get a vaccuum tester for about $15 or so. Then you can test what your vaccuum is. Also get a chiltons or other manual to see what your vac should be, approx since the motor is not stock.

Otherwise rip the edl. apart and clean it up, if you have a bit of blowby it may have sucked in a little too much oil from the pcv. And make sure that your valve covers are baffled where the pcv is plugged in.

 

[batman09]

batman,,when you converted to PCV did you allow for a crankcase breather in the aircleaner or one breather in the manifold or valve cover?
The PCV must not pull a vacumn on the crankcase, just pull air through the crankcase.
RED67

Red,
One breather on one valve cover,the pvc brather on the other.bm

 

[batman09]

Do it yourself looking for a vac leak would be to spray carb cleaner on the outside surfaces of the carb (While running at idle). Spray it wherever there is a gasket. If the engine reves up you found a leak.

You can also go to a parts store and get a vaccuum tester for about $15 or so. Then you can test what your vaccuum is. Also get a chiltons or other manual to see what your vac should be, approx since the motor is not stock.

Otherwise rip the edl. apart and clean it up, if you have a bit of blowby it may have sucked in a little too much oil from the pcv. And make sure that your valve covers are baffled where the pcv is plugged in.

Thanks shade,
I have a vacuum tester and she's reading 13 psi( i think is good).I'm just about to rip it apart.bm

 

[NIGHTSHADE]

13psi where. The upper ports are different then the lower ports. Manifold and ported vaccuum I think. Couldn't tell ya the differance but I know that there is one.

 

[SS 396]

Psi

 

[72GreenRally]

Manifold vaccuum is actual vaccuum pressure at the manifold. Ported vaccuum has no vaccuum at idle, but will have vaccuum once the throttle blades have been opened.

Bruce, have you checked your timing? Before you start chasing gremlins in the carb, make sure the fire is getting in the hole at the right time.

Randy (timing can effect more than you realize)