90' Bronco II, MAP Sensor
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90' Bronco II, MAP Sensor
I'm getting a code for a faulty MAP sensor on my 90' Bronco II. Anyone know where its really located at? The haynes manual says it should be on either the firewall or fenderwell but I cant locate it at either spot. The book also says in 1990 there were two different electrical systems for this model year, one with a MAP and one without, the code on my door matches up with the newer of the two systems that would have a MAP sensor.
I can't remember the trouble code off hand, but the symptons are rough idle after warm and a delayed response from the throttle when trying to accelerate after being stopped.
I can't remember the trouble code off hand, but the symptons are rough idle after warm and a delayed response from the throttle when trying to accelerate after being stopped.
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Joined: Sep 2004
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From: Yokosuka, Honshu, Japan
Are you sure it's not a MAF sensor you're talking about? If so, there will be some wiring that goes to an assembly in-line with the air tube from the air filter box to the throttle body. Easiest way to tell if it's a MAF- and not MAP-equipped vehicle is to pull the air tube from the throttle body and try starting it. It WON'T start if it's a MAF-equipped truck. Probably needs a MAF sensor cleaning or you have a leak in the air tube. Hope this helps 
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From: UT
MAP sensor on my BII was on the firewall right next to the AC evaporator housing. It will have a vacuum line going to the throttle body.
MAF on my Explore is just downstream of the air filter housing.
The only 2 digit EEC-IV code that I see for either MAF or MAP is a KOER 72, which is almost always operator error rather than a fault in the EEC-IV system.
A lot of useless guessing can go into guessing which code you got. My best piece of advice would be to repeat the self-tests and report back with the exact code(s) you got. If someone else is pulling codes for you (and that's why you didn't simply go back out and repeat the test), I would suggest getting a decent set of instructions (Ken00 ahs posted a useable set in his tech info sticky) and figure out how to get codes yourself.
MAF on my Explore is just downstream of the air filter housing.
The only 2 digit EEC-IV code that I see for either MAF or MAP is a KOER 72, which is almost always operator error rather than a fault in the EEC-IV system.
A lot of useless guessing can go into guessing which code you got. My best piece of advice would be to repeat the self-tests and report back with the exact code(s) you got. If someone else is pulling codes for you (and that's why you didn't simply go back out and repeat the test), I would suggest getting a decent set of instructions (Ken00 ahs posted a useable set in his tech info sticky) and figure out how to get codes yourself.
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Thanks for the help. Its parked at my dad's shop right now so I cant immediatly look at it, but I'm pretty sure its MAP equiped and not MAF. I've seen the MAF on a 94 Explorer I used to own and it didnt jump out at me like it did on the Explorer. I'll double check.
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From: Yokosuka, Honshu, Japan
If it's a MAP-equipped truck, you'll have a "tree" just aft of the throttle body flange and there will be a vacuum line (usually black plastic with rubber pieces at each end) that goes to the MAP sensor. Otherwise, look betweent the throttle body and air box or in the air box for a MAF sensor (it'll have wires going to it, of course!). I can't remember if it was just the '90 California models or what that had MAFs and not MAPs. Anyhow, hope we've been able to help and hope you get 'er fixed up and running good soon.
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