Bigger cam+catalytic converter=more smoke from exhaust until warmed up?
#1
Bigger cam+catalytic converter=more smoke from exhaust until warmed up?
My car has been smoking more than normal lately, but if it does it it's only when I first start it up in the morning, smokes for about ten minutes then stops. It's like the car is running rich while warming up, smoking, then when it quits running rich the smoke stops. Anyone else had this happen?
It's a HOTcam, ported heads, random tech high flow cat, PCMforless tune.......
It's a HOTcam, ported heads, random tech high flow cat, PCMforless tune.......
#2
I know mine smokes like a bastard on cold mornings. No cam, but I have a gutted cat. Makes sense that a high flow cat and a bigger cam would act the same. I think the smoke is a result of the AIR pump until it shuts off.
#3
I've removed my air pump. This really freaked me out because I thought all the smoke was a blown headgasket, but the guys I know at the mechanic shop ran a few tests and said for sure that I don't. The smoke gets pretty bad sometimes.
If more smoke than usual is normal I'll live with it, just kind of unnerving to look in the rearview and see a plume of smoke at stoplights
If more smoke than usual is normal I'll live with it, just kind of unnerving to look in the rearview and see a plume of smoke at stoplights
#7
Mine has a lot more smoke when cold than before. Big ol white cloud forms at the beginning. It wasn't as much before cam. I did notice that my car stopped producing smoke faster than my friends none cammed cars tho while getting warm..
#9
It's definitely white smoke...... 138k miles.
The guy I know that works at the mechanics shop said that if a car is loading up on fuel then it can produce more white smoke that usual out of the exhaust. He said that he had a car come in with an injector stuck open and it was pouring white smoke out.
I think maybe the tune on the car is programmed to dump a lot of fuel in while the car is warming up to "light off" the catalytic converter. This might be even more so since I have a PCMforless tune, as I'm not sure if it's running richer at idle now.
The guy I know that works at the mechanics shop said that if a car is loading up on fuel then it can produce more white smoke that usual out of the exhaust. He said that he had a car come in with an injector stuck open and it was pouring white smoke out.
I think maybe the tune on the car is programmed to dump a lot of fuel in while the car is warming up to "light off" the catalytic converter. This might be even more so since I have a PCMforless tune, as I'm not sure if it's running richer at idle now.
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