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[b]91 nc 5.0l map sensor[/b] 

 

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 Post subject: [b]91 nc 5.0l map sensor[/b]
Posted: Sat Dec 06, 2008 6:22 pm 
Parts Gopher
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hi guys was wanting to know where i would find the vacuum line for map sensor on this 5.0l i have acquired 91 nc runs very rough and would like to know if anyone knows where map sensor vacuum comes from. :)
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Posted: Sat Dec 06, 2008 7:33 pm 
Getting Side Ways
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V8's run a maf meter that is attached to the air box.

It has two little heat probes in it DONT TOUCH THEM.
You can clean them with electrical cleaner that leaves no residue.

Check egr valve isnt stuck open allowing exhaust gases in at idle.
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Posted: Sat Dec 06, 2008 9:00 pm 
Getting Side Ways
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Early EBs and NCs also run a MAP. I'd imagine that the vacuum line would run from under the upper inlet which can be a bit hard to see what your reaching for. Also, do what RAPTOR_XR8 says, which will also do lots for your motor.

 

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Posted: Sun Dec 07, 2008 12:43 am 
Getting Side Ways
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Its actually a bap as it reads barometric pressure..
Its vented to atmo...
Same as 6 cyl map sensor though..

 

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Posted: Sun Dec 07, 2008 12:45 am 
Stock as a Rock
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correct,

so no vaccum line is used


i always wondered if you could use these to convert back to map only??

 

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Posted: Sun Dec 07, 2008 9:56 am 
Getting Side Ways
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So is there any good reason as to why ford used it then got rid of them.

Also without it plugged in would it effect the motor/tune.
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Posted: Sun Dec 07, 2008 12:05 pm 
Stock as a Rock
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not realy sure why ford used it, think it was a new system for the first of there SEFI motors using a MAF, proberly needed as many sensors as poisable to get the fuelmixtures/timing corect

maybe lol

 

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Posted: Mon Dec 08, 2008 3:12 pm 
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They found that there was enough air pressure compensation via ACT and MAF so they heave-ho'd the BAP sensor.
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Posted: Mon Dec 08, 2008 7:42 pm 
Parts Gopher
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thanks everyone who replied i found this information very helpful indeed.
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