3.0 cold start problem
hi when i go to start my truck after it has been siting all night or all day during work if you dont give it gas it will die right away and to make it start fine you have to give its some gas for about 10-15 seconds till it idles like normal but once you drive it and turn it off for a bit then it will start no problem and it doesnt matter if it is cold or warm
just wondering if anyone else has had this problem thanks |
Re: 3.0 cold start problem
well if it does this when it's warm or cold out I would check your alternator or battery. Your battery might not be holding a charge or your alternator might not be charging your battery enough. Could also be something to do with your truck not getting enough fuel to get it to start properly
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Re: 3.0 cold start problem
I think you misread it. It starts just fine. It just won't stay running. Nothing to do with electrical or fuel.
On a cold engine, it is in open loop mode, not using any sensors to maintain proper running. On a warm engine, it uses all its sensors to do its thing. That is why it runs differently before it warms up. I would start with cleaning the IAC and throttle body. |
Re: 3.0 cold start problem
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http://www.fordrangerforum.com/how-s...r-control.html |
Re: 3.0 cold start problem
oh ya sorry I misread it I was on my iphone. ( lol)
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Re: 3.0 cold start problem
did you ever find out the fix for this? I just bought my mom a 94 b3000 with the 3.0 and it does the same thing. I have replaced the iac with no change. Any help would be greatly appreciated :D
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Re: 3.0 cold start problem
no still havnt figured it out but if i do i will let u know for sure or if u figure it out if u could let me know
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Re: 3.0 cold start problem
I'm going to go with the fuel pressure regulator being the problem. Pull the vacuum line from it and check for fuel in the vacuum line/coming from the nipple on the FPR. If theres fuel it needs replaced. THe way I understand EFI engines work is that when you depresses the accelerator(gas) pedal it opens the throttle plate and does not pulse the injectors leaning the engine, when this allows the engine to crank its a sign that it was too rich to start(which is why it just sputters). A typical cause for a rich condition at start is a bad FPR.
This will be located near the fuel rail and will look like similar to this. http://i.ebayimg.com/00/$(KGrHqR,!jI...74)bQ~~_35.JPG |
Re: 3.0 cold start problem
I've got the same problem with mine - but its worse with flex fuel. It will not compeletely die if I run gas, but it will die once on start-up with flex fuel and then when I restart it will run ok. If I give it some pedal when starting, it will stay running. It seems to be worse the first start of the day and all other starts during the day seem ok (not great but it will keep running). It always runs/starts good when warm. No codes.
1999 Ranger 3.0L, 2WD, AUTO, 98K miles. |
Re: 3.0 cold start problem
let me know if u guys fined out wut it is
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Re: 3.0 cold start problem
Have you cleaned the throttle body an made sure it is closing all the way? Disconnect the battery for 10 minutes to force it to relearn its idle?
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Re: 3.0 cold start problem
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I've replaced plugs, wires and checked for vacuum leaks. Also checked the EGR valve. All that checks out fine. The IAC was cleaned and made no difference. I think its working as I've unpluged it and the idle drops way down. Plug it in and it goes back up. I've also checked the vacuum on the motor and it's about 15. Seems a little low, but I'm not sure what it's supposed to be. I'm about ready to take it to the dealer and have them plug it into their scan tool. |
Re: 3.0 cold start problem
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Re: 3.0 cold start problem
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Re: 3.0 cold start problem
Disconnect the battery for 10 minutes to force it to relearn its idle????
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