My Car Has A Really Rough Iddle In The Morning

[Guest wearedriven]

WHAT COULD IT BE

 

it warms up and it goes away a little

 

sounds like its missing

 

acts like a vacum leak

 

sounds like a train

 

and wastes loads of gas

 

ignition is ok

 

all sparks plugs are firing

 

running hella rich.

[AK-Z]

What car is it? It could be the cold start valve.

[wingnutthehutt]

My 280 was doing this last week but it went away. I put it down to using shitty Chevron gas, I was on E, and the cleaners loosening up something that didn't agree with my injectors digestion.

[TheNeedForZ]

Shitty Chevron gas? I thought they have one of the best gas?!

[240hoke]

BP is the only gas i use in any of my vehicles

[wingnutthehutt]

Chevron gas is full of cleaners which are good for your injection system, but not good for actual fuel mileage. I could get all technical here, but I'd have clue what I'm talking about. Essentially though, the brand name fuels that cost more are charging you for the additives which make your car run "better". Better to us and better to them are two different things. They mean run cleaner, and we mean with more power. I try to use mainly Arco gasoline, as they're the only brand name with no additives. But generally speaking, at least here on the West coast, the cheaper the gas, the better it is. As long as it's not literally watered down.

[Guest wearedriven]

yeap its getting worse, how do you check injectors to see if the flow cuz the wire harness has power i cheked it with a led light.

the car is a 78 280z with out the egr system its hat an intake manifold from the early fuel injected models yep

[wingnutthehutt]

yeah, ditto, me too. It's back with a vengeance and I was thinking about selling this thing but that won't happen if it doesn't run right.