OK here is the case. I drive my 88 vert everyday... When I hit about 3500 rpm my car smokes for about 3 seconds.. buts its alot. If I leave my car sitting for a week it smokes for about 5 minutes. I think its either the injector or the coolant seals. If I have an injector leak will it cause this smoke and will it give me a rich mixture.

 

Fuel is usually black, and coolant is white. Sounds like coolant.

 

yeah i know but why at a certain rpm...is it becaue the water pump is adding more pressure on the seals.

 

Pressure and flow rate. How do you know it doesn't smoke at higher revs? Maybe because at that rpm+ the coolant is flowing at a rate high enough to seep through your coolant seals.

Atleast I bumped your thread up

 

I think it is coolant as well ERAUMAZDA. Mine does the same thing. Check your overflow resivoir every once and a while, see if your coolant level drops some. When mine smokes like that, i usually have to drop in a bit of coolant into my over flow tank just to be safe.

On the subject, when you said it smokes a lot if you havn't driven it in a while, this also is the cooler seasons, and you can see condisation burning off the mufflers a lot easier. Either way, it could be one or both of the reasons.

Good luck with it

-Marshall

 

Probably coolant and oil-high rpm smoke usually side oil seals going. If you drive it for a while above 4k rpm you will probably notice oil is low also. Had the same symptoms on my '79, was fine if I kept it under 4k but it did smoke at startup for a while until warm.

 

answer coolant----trust me----