Got the cam in, now it won't idle

[az-k5]

I got new goodwrench heads, set the cam stock. Got it broke in 2000-3000RPM for 30 mins. Now it won't idle. Will not... At all. It will fire right up and run just fine with some throttle (about 1200 RPM). I have moved the dizzy all over and have it where it runs the smoothest. It behaves the same with the vacuum advance and without the vacuum advance. I put the same q-jet back on it that was on it a week ago.

I went from a stock cam, 882 heads, stock intake to a summit dual grind cam (270 lift), Edelbrock performer intake, and goodwrench heads.

Where should I start looking?

Thanks for dealing with me.

Matt

 

[BGKYK5]

Vacuum leak?

 

[az-k5]

Vacuum leak?

Bingo!! The carb hold down bolts were too long with the new intake. Done.
Thanks

Now I have to chase out the knock/denotation.

 

[Jason4x4]

good to see it's running again.

 

[newyorkin]

Dang, I lmost smacked my monitor when your sig line came up...

 

[az-k5]

good to see it's running again.

Ya it is, not as nice as I wanted. The performer intake is noisy as hell. Sounds like open headers under there. I think it is the exhaust cross over under the intake (for the choke), but it sounds really loud. Drives pretty decent though. I think I need to adjust the rockers too so that may be part of it. There is no pressure coming out of the carb though. I hate engines

 

[pauly383]

Its aluminum , and flowing a good deal better than stock . Cast iron intakes , even the better flowing ones are quieter .

 

[az-k5]

Its aluminum , and flowing a good deal better than stock . Cast iron intakes , even the better flowing ones are quieter .

I got it all figured out.

Things to watch for with new intakes

Carb bolts- looked tight but were just a hair short and caused an enormous vacuum leak and was the reason it would not idle.

Choke heat sink - once again felt tight but was a little too long. Bent to fit and snugged down.
--- this problem cause the funny open header noise. It allowed a heavy exhaust leak right next to the carb. You know something is wrong when the intake is louder than the exhaust.

Over all, the truck is awesome now. Pulls a lot harder in all of the gears. Can't wait to tow the truggy. Ya its no diesel but it is payed for, easy to park and cheap to fix.

 

[pauly383]

More power is a good thing , I keep waiting for someone to t-bone the pickup I got so the roller motor can go in the Blazer ( after new freeze plugs and gaskets ) .

These damn roller motors are the chit , 6000 lbs , 200,000 miles and its as quick of the line as my wifes Impala