i have a 94 ranger 4x2 with 150k miles...regular tune-ups(plugs, oil
its always been cold natured, not wanting to stay running in winter
till it warms up.
but its been doing it all summer and not just while warming up.
revs low then back up. A/C makes it worse..rotorand cap look good,
plugs are gapped within specs..
i was thinking the choke...cant afford to be wrong though
Oh my! I think, if you're going to work on this vehicle, you had better
learn how its systems operate.
First, the fact it's a 4x2 means nothing... you didnt include what engine.
Second there's no "choke"
Go to the library and find book on Ford or Bosch FI systems by Charles O
Read it thoroughly
Now go to google and search this group on your problem..
In point of fact, your intuition may be right in that the problem is at the
Main suspect: the Idle Air Bypass or Idle Speed Control mechanism (same
1. NEVER adjust throttle stop screw except as absolute last resort
2. NEVER use CHOKE cleaner.. look for product that says it's safe for FI and
At least get a Haynes book on the vehicle, you cant afford to NOT have a
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