I posted this a while back but put it off til now.
I have a problem that when my car is cold, my tach sticks at idle or won't go past 2000 RPM when the engine is cold. Doesn't happen in the summer, but on a brisk morning of when the temp is in the 20's or 30's the tach will either stay at 0 and not move at all...or jump to idle and not move at all. Sometimes it will move, but won't go past 2000 RPM.
This happens until the engine warms up then it works fine. When the temp is in the 50's and 60's it takes 2-3 mins for it to be fine. When it's in the 20's/30's it might take 10-15 minutes.
I have gauge face overlays but i've checked twice the the needle is not hitting the face at all.
Does the crank position sensor control tach input? Does it control anything else?? Any way i can test this sensor? Would it trip the CEL if faulty? How much is a new one at Ford?
I have a problem that when my car is cold, my tach sticks at idle or won't go past 2000 RPM when the engine is cold. Doesn't happen in the summer, but on a brisk morning of when the temp is in the 20's or 30's the tach will either stay at 0 and not move at all...or jump to idle and not move at all. Sometimes it will move, but won't go past 2000 RPM.
This happens until the engine warms up then it works fine. When the temp is in the 50's and 60's it takes 2-3 mins for it to be fine. When it's in the 20's/30's it might take 10-15 minutes.
I have gauge face overlays but i've checked twice the the needle is not hitting the face at all.
Does the crank position sensor control tach input? Does it control anything else?? Any way i can test this sensor? Would it trip the CEL if faulty? How much is a new one at Ford?