need help quick

Groundhawger · March 31, 2009, 09:05:58 PM

WE JUST PUT NEW HEAD GASKETS ON A 93 CHEVY WITH A TBI 350. WHEN IT IS COLD IT RUNS BAD, IT WILL REV UP, THEN BARELY IDLE, IT WILL KEEP DOING THAT AND IT WONT IDLE NORMAL. WHEN IT GETS WARM, IT RUNS GOOD. ANY IDEA'S? ALL NEW GASKETS AND WE CHECKED FOR AN INTAKE LEAK OR TBI LEAK AND EVERYTHING IS FINE. ANY IDEAS'S? GOTTA GET THIS OUT OF THE GARAGE TONIGHT SO ALL HELP IS APPRECIATED, THANKS

Disturban · March 31, 2009, 09:23:45 PM

Either ya got a leak somewhere (Intake gasket) or you might be off a tooth when ya put the distributor back in. You also might have missed a vacuum line and are sucking air.

Did not see it runs good when warm? Mmmmm I think Cornbread just went through this same problem...I forgot what it was though. Might want to PM him.

onetoughchevy · March 31, 2009, 09:29:10 PM

did that year com with an iac sensor that will do something similer to what ur discribing

Groundhawger · March 31, 2009, 09:53:37 PM

now when we have it running, when we turn the headlights on or hit the brakes it dies.

mudbrat71 · March 31, 2009, 10:06:23 PM

ground

Mudbuster · March 31, 2009, 10:20:29 PM

Quote from: mudbrat71 on March 31, 2009, 10:06:23 PM
ground

there should be a ground on the back of the passenger side head check that

Ranger Dave · March 31, 2009, 10:35:36 PM

Quote from: Mudbuster on March 31, 2009, 10:20:29 PM
Quote from: mudbrat71 on March 31, 2009, 10:06:23 PM
ground

there should be a ground on the back of the passenger side head check that

x3 ground wire

Groundhawger · March 31, 2009, 11:52:47 PM

all grounds are good. engine still running bad on idle. not sure what is going on

TBigLug · April 01, 2009, 12:17:30 AM

Grounds, IAC (idle air control valve) or CSV (cold start valve). My three suggestions.

mudbrat71 · April 01, 2009, 12:36:59 PM

relash your valves if to tite u will not have enough vacum to run rite and computer will try and compinsate for it

Groundhawger · April 01, 2009, 02:35:14 PM

Quote from: TBigLug on April 01, 2009, 12:17:30 AM
Grounds, IAC (idle air control valve) or CSV (cold start valve). My three suggestions.

were are these located?

Mudduck · April 01, 2009, 03:31:38 PM

egr?

mudbrat71 · April 01, 2009, 03:59:11 PM

Quote from: Groundhawger on April 01, 2009, 02:35:14 PM
Quote from: TBigLug on April 01, 2009, 12:17:30 AM
Grounds, IAC (idle air control valve) or CSV (cold start valve). My three suggestions.
were are these located?

iac on throtle body 4 wire sqaure plug u should have 3 ground wires at thermostat housing and 1or 2 at back of heads and no csv