View Full Version : 98 ranger 4.o ohv
i have several problems with this motor one is when i come to a redlight the engine stays idled up way to high almost like the throtle is sticking but i have checked the cable its fine someone said it might be the idle air on the side of the intake i took it off and cleaned it that didnt do any thing also its hard to start sometimes like its not geting fuel but its strange these problems come and go i have replace almost everything sensor wise and still cant get this engine to run right new injectors mass air flow o2s fuel preg iat new intake gaskets new egr any ideas
10-16-2010, 01:43 PM
Check the throttle body, make sure nothing is keeping the butterfly open.
There is a little throttle stop bolt on the throttle body itself. On my 97 it was fubar when i got it and idling around 2500. The correct way to adjust this is in another post and you'll need a volt meter to check the voltage off the TPS. Don't quote me, but the TPS should be at 0.9 volts when closed if its workin right. Basically fiddle with that bolt, you'll know which one I'm talking about when you look at the throttle, and adjust accordingly.
Otherwise you have a vacuum leak somewhere.
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