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Old 09-13-2009, 02:35 PM   #1
my77cobra2
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Exclamation 2.9L Vacuum Diagram

i need a vacuum diagram for a 1987 ford ranger with a fuel injected 2.9L.....i cant find on online ANYWHERE....please....if you have one......post it....im in desperate need....im goin on a 700mi. trip to college an then to and from school/work......

here's whats happening on a cold start....

1. start the engine..... engine stalls... multiple times
2. finally once the engine is running... barely... the RPM's fluctuate up and down until the engine is warm....
3. if i try to drive while the RPM's are fluctuating... obviously the engine will stall.....
4. the engine does this for a good 5-10 minutes......

believe that this is a vacuum issue.... i could be wrong....

but PLEASE post...... tell me whats wrong.... and how to fix it
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Old 09-13-2009, 10:01 PM   #2
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you need to pull codes, or have someone do it for you. Without the info from the KOEO and KOER tests you are guessing.
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Old 09-14-2009, 09:26 AM   #3
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ok great thanks.... but where do i get the code reader for my truck? obviously its OBDI and ery manufacturer has a different OBDI connector....
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Old 09-14-2009, 05:44 PM   #4
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Quote:
Originally Posted by my77cobra2 View Post
ok great thanks.... but where do i get the code reader for my truck? obviously its OBDI and ery manufacturer has a different OBDI connector....
Don't really need a "reader" but they are nice. another way is http://www.therangerstation.com/tech_library/OBD_I.html
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Old 09-29-2009, 12:07 PM   #5
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Exclamation Found The Diagram!!!!!

heres the diagram tht i ws lookin for:

[IMG][/IMG]
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Old 01-19-2014, 04:46 PM   #6
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Quote:
Originally Posted by my77cobra2 View Post
heres the diagram tht i ws lookin for:

[IMG][/IMG]
I needed this diagram as well; thanks for posting it. But umm... for those of us less mechanically sound on older vehicles, could you please translate it into english?
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Old 01-19-2014, 06:03 PM   #7
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It's a pretty straight forward vacuum system. Which parts of it do you not understand?
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Old 01-19-2014, 06:09 PM   #8
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I just don't understand the abbreviations for all the components; there are some of them that I'm not familiar with. I grew up during the OBDII age, where everything is electric. Lol. Not that I don't love my old 86.
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Old 01-19-2014, 06:32 PM   #9
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Ah.

There isn't much on there that is any different in name or function than the OBDII parts. Just the air diverter.

FPR is the fuel pressure regulator. It's the round thing by the fuel line connections at the rail.

Man Vac is manifold vacuum, usually found on the tree.

EGR is the EGR.

EVP is the carbon canister by the LH headlight.

MAP is the sensor hanging off the firewall.
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Old 01-19-2014, 06:41 PM   #10
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Thanks for clarifying. I just started school up in Bessemer, AL in August; training to be a Ford technician. Still not an expert! Lol.
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