hard starting (cold) on 1990 Ford Ranger

Periodically my truck will not start when cold or damp outside. However if I spray starting fluid in the TB while cranking it will start. It will run rough for a few minutes and check engine light is on. Once engine idles for a few minutes check engine light goes out and truck runs just fine. I did install new fuel pump, fuel filter, and new air cleaner. Could it be the Idle Air Bypass sensor?

by in Omaha, NE on May 09, 2010
2 answers
ANSWER by on May 09, 2010
I think that it is an issue with your fuel system. You spray starting fluid in your throttle body and that starts the car, which is a fuel substitute. It could be that your fuel system is bleeding down over night and not holding pressure, so it takes forever to get it started. It may be that the pump and all else is not totally dialed in, it may also be a weak fuel pump relay, that comes on after a bit of running. Did you use factory parts? I have seen really weird problems with some after market fuel pumps.
ANSWER by on December 22, 2014
I had the same problem with my 1998 4.0 Ranger. The fix was a simple one for mine. Under the front of your vehicle is a crank sensor. If it isn't sealing properly it will not start in damp weather. When mine had the same problem, we, cert Ford mech and I, took to plug apart, cleaned it, and resealed it with some dialectric lube. Problem solved in my case. Hope this helps with yours.
Related Items:
If you experience cold starting problems, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steadily and run when the acce...
Doesn't start in cold days.No fire to coils.Starts when weather is warm and will start for rest of the day till next morning.Only 1 coil is firing though when starting.E-mail is fcat@unm.edu
Anytime the temp outside gets down below 40 the truck will not start. I have new plugs and plug wires and new battery already installed. Need some suggetions.
In warm weather the truck starts fine , every time. Cooler weather, periodically hard to start. Usually have to cycle key 5 or more times to start. Once started idles and runs fine. No codes, no wa...

Related Content