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My 1990 F-150 does not start in wet weather, heavy humidity ...

Sent to Car Experts August 22 08:14 AM

My 1990 F-150 does not start in wet weather, heavy humidity except with starter spray. Then runs rough until engine warms up and engine light goes out. I have replaced the coil with no luck. What parts should I try next?

 

Optional Information:
1990 Ford F-150 6 cyl.

Already Tried:
Coil replacement

Customer (name blocked for privacy)
Status:  Closed   Value: $9
Answer
August 22 10:38 AM (2 hours and 24 minutes and 14 seconds later)
         
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AMEDEE -- ASE MASTER TECH -- 98% Positive Feedback on 1200 Car Accepts
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Answer
August 22 2:51 PM (4 hours and 12 minutes and 10 seconds later)
         
REPLIEDCheck Mark
I work very hard to get u correct answers and to save u money. If this has helped in anyway, by fixing the problem, or even by narrowing the problem down, please hit the accept button. If my answer is unclear or if u need more info, dont be afraid to ask. Thanks
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AMEDEE -- ASE MASTER TECH -- 98% Positive Feedback on 1200 Car Accepts
ADVANCED LEVEL SPECIALIST
Reply
August 22 3:36 PM (45 minutes and 26 seconds later)
         
Reply to amedee's Post: I don't understand how your answer applies when my problem occurs only during humid conditions and corrects itself when the engine warms (drys) out.
Customer (name blocked for privacy)
Answer
August 22 4:43 PM (1 hour and 6 minutes and 37 seconds later)
         
REPLIEDCheck Mark
Maybe the pump just acts up when its warm. This is not uncommon! U need to check fuel pressure!
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AMEDEE -- ASE MASTER TECH -- 98% Positive Feedback on 1200 Car Accepts
ADVANCED LEVEL SPECIALIST
Reply
August 22 4:51 PM (8 minutes and 33 seconds later)
         
Reply to amedee's Post: My original request was based on it not starting in humid, wet weather...warm or dry. if it is dry there is absolutely no problem in cold or extremely hot days. Again, to be satisfied. I need to know how humidity would affect my fuel pump or fuel pressure when trying to start the vehicle. there is no problem after the engine runs for a few minutes.
Customer (name blocked for privacy)
Answer
August 22 5:23 PM (32 minutes and 7 seconds later)
         
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AMEDEE -- ASE MASTER TECH -- 98% Positive Feedback on 1200 Car Accepts
ADVANCED LEVEL SPECIALIST
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