Cold Acceleration Problem

[venumus93]

Hey everyone-

Newbie here with a big problem. I have a 1976 280Z that has a 'flat spot' when hitting the gas when the engine is cold, accompanied by back fires through the throttle body. I just had my mechanic replace the cold start valve, clean out the throttle body, clean out the mass air meter, and clean off the spark plugs. When the car warms up, it runs like a champ!

Please someone help meeeeeeee!! I want to get back to driving my Z!!!!!

Thanks!

later!

Sean

[sblake01]

Did he check to see if the air regulator was functioning properly?

[venumus93]

How do you check to see if the mass air meter is functioning properly? Confusing part is that it has no problems once the engine warms up after a couple minutes.

Thanks for any advice! If I have to, I am just going to replace parts that may be the problem until it goes away. But that shouldn't have to happen hopefully!! :-)

later!

Sean

p.s. could this have anythign to do with the 'pickups' in the distributor? anyone know what the gap for those is supposed to be?