2.9 2500 + RPM problem
Join Date: Apr 2004
Post Per Day: 2
User is: Online Hello from a puzzled Bronco guy
Hello, I'm new here but I thought I'd get right to it !!!
I have a 1987 Bronco II and here's what I've got going on;
Starts fine every time,
I can go for miles around town with no problems and it runs like it new,
BUT, as soon as I get on the Freeway It takes about 1/2 mile and it
starts bucking and I get black smoke. This will go on timed at about 8 sec and run fine and start it over again.But now if i go back to town driving
it will run bad with black smoke about every 8 sec. and it I stop
and do some shopping it runs fine again ( until I use the Freeway )
I've changed o2 sen, TPS, Plugs, air filter, Fuel Reg.
Any one have an idea where to look next.