stumbling on start
04-18-2009, 06:54 PM
#1
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stumbling on start
I have a 1995 F150 4x4 4.0. It has always run great. Lately It's been hard to start. It stumble and wants to die, but once it starts it runs great. I have gone thruogh and done a complete tune up. Plugs ,wires new cap and roter, due to some codes Map sensor and fuel pressure reg\ and fuel/air filter. I've check for vacuum leaks, none. The thing that has got me baffled is it runs great once I get it fire on all 6. Any ideas would be appresiated.
Biodawg
Biodawg
04-19-2009, 12:16 AM
#3
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It might be losing fuel pressure when it sits. Try turning the key (without starting) until the pump primes. Turn off, prime again - 2 or 3 times. Try to start after that, and see if she fires first time.
This is not a solution, but will help figure out which direction to head from here.
This is not a solution, but will help figure out which direction to head from here.
04-20-2009, 09:03 AM
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watch your fuel tank levels. might have crossfilling / bad fuel pump. from what i've read on here (and now think i'm experiencing), they're junk. You can try higher octane and some fuel additive...