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i have a 1990 f150,4.9. after sitting all day or night,it ...

Sent to Car Experts June 02, 2006 8:05 p.m.

i have a 1990 f150,4.9. after sitting all day or night,it is hard to start. after that it starts with no problem

Optional Information:
1990 Ford f150 4.9

Already Tried:
tune up

Customer (name blocked for privacy)

Status: Closed Value: $10

Answer
June 02, 2006 8:08 p.m. (3 minutes and 5 seconds later)

REPLIED

Thanks for the great question.

Sounds like the fuel pressure is dropping down over a long period of time. You will need to do a fuel pressure test to see if the fuel pressure drops after shutting the engine off. It should not drop anymore than 10 psi over a 2 hour period.

Thanks

Fordanswerman

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1 Other Expert Agrees with this!

Fordanswerman -- Auto Service Technician -- 98% Positive Feedback on 262 Car Accepts
Ford Engine Master/Transmission Master/Chassis Master=Ford Senior Master also Diesel 7.3/6.0

Reply to Fordanswerman
Sent June 02, 2006 8:14 p.m. (5 minutes and 37 seconds later)

after two hours it will start with no problem.after sitting all day or night then there is aproblem

Customer (name blocked for privacy)

Answer
June 02, 2006 8:28 p.m. (14 minutes and 35 seconds later)

REPLIED

Thanks.

Then the best thing to do is to put the fuel pressure gauge on overnight and see if it drops.

Thanks

Fordanswerman

Fordanswerman -- Auto Service Technician -- 98% Positive Feedback on 262 Car Accepts
Ford Engine Master/Transmission Master/Chassis Master=Ford Senior Master also Diesel 7.3/6.0

Reply to Fordanswerman
Sent June 02, 2006 8:33 p.m. (4 minutes and 45 seconds later)

and if it drops, then what

Customer (name blocked for privacy)

Answer
June 02, 2006 8:36 p.m. (2 minutes and 39 seconds later)

REPLIED

Thanks

You are either looking at a bad fuel pressure regulator, and leaking injector or a bad fuel pump.

Does this have dual tanks?

Thanks

Fordanswerman

Fordanswerman -- Auto Service Technician -- 98% Positive Feedback on 262 Car Accepts
Ford Engine Master/Transmission Master/Chassis Master=Ford Senior Master also Diesel 7.3/6.0

Reply to Fordanswerman
Sent June 02, 2006 8:39 p.m. (2 minutes and 53 seconds later)

yes,it has dual tanks

Customer (name blocked for privacy)

Info Request
June 02, 2006 8:40 p.m. (1 minute and 31 seconds later)

REPLIED to Info Request

Thanks

Does it do this on either tank?

Thanks

Fordanswerman

Fordanswerman -- Auto Service Technician -- 98% Positive Feedback on 262 Car Accepts
Ford Engine Master/Transmission Master/Chassis Master=Ford Senior Master also Diesel 7.3/6.0

Reply to Fordanswerman
Sent June 02, 2006 8:45 p.m. (4 minutes and 19 seconds later)

either tank

Customer (name blocked for privacy)

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