Map sensor S.D. -Mass Air Same?

bryanrevans

New Member

Sep 10, 2004

296

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0

Chicopee,Mass

Sep 13, 2004

#1

• Sep 13, 2004

• #1

I got 86 gt.Just put my stock tb and intake off of old 89.Now im getting map sensor code and rich code.Car would not start intil i unplugged map sensor vacuum hose.Finally started but had black smoke and two codes Map and super rich.Would i have excess fuel just from the vacuum being unplugged on map sensor??And is Map sensor for Speed Density and Mass air the same?I know that on some mass air theres no vacuum hose,it just hands there.I nocticed that my 89 had 1 vacuum hole plugged on intake!!!!!!

 

BlackFox5.0

Founding Member

Aug 7, 2000

3,514

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Massachusetts

Sep 13, 2004

#2

• Sep 13, 2004

• #2

Is the vacuum line removed from the sensor? If not remove it, and plug the line so you don't have a vacuum leak. I forgot to pull the hose off when I converted my '87, and it wouldn't even start. They are different, but either will work on a MAF car.

 

bryanrevans

New Member

Sep 10, 2004

296

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Chicopee,Mass

Sep 13, 2004

#3

• Sep 13, 2004

• #3

I just purchased the 86 gt it is still Speed Density.I had the stock Tb and Upper from a 89 notch that I sold w\mods.I put the 89 stuff on because I was having idle problems w\86 The 86 tb is 58mm and 89 60mm.

 

bryanrevans

New Member

Sep 10, 2004

296

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Chicopee,Mass

Sep 13, 2004

#4

• Sep 13, 2004

• #4

If I throw in another Map does it have to be from SD.The only difference i can tell is the mass air has knob where vacuum hose would be for SD car.

 

BlackFox5.0

Founding Member

Aug 7, 2000

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Massachusetts

Sep 13, 2004

#5

• Sep 13, 2004

• #5

Mine ran with a SD sensor and MAF, with the vacuum line unplugged. I thnk you mean you want to put a MAP sensor from a MAF car into the '86? Then you would have to put a vacuum line to it.

That sensor should not cause problems with idle. The idle is choppy? surges? stalls? It's probably something else like the IAC.

 

bryanrevans

New Member

Sep 10, 2004

296

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0

Chicopee,Mass

Sep 13, 2004

#6

• Sep 13, 2004

• #6

What happed was after I put Throttle body,upper intake,lower intake,I.A.C Valve,Egr Valve from a 89 5.0 onto a completely stock Speed Density 86 5.0
I couldnt get it to start.It would turn over strong and hang for a 1\2 second at 1500 rpm.I thought maybe i didnt torq lower intake proper like!!So i scanned for codes and got Map Sensor code.Unplugged the Map Sensor plugg nothing.So next i plugged backin and then unplugged vacuum,Fires right up with super rich condition!!Black smoke idle, arround 800-900 Of course when i scanned codes again I got MAP and rich fuel mixture.I got map code cause no vaccuum, right??????But do I have rich fuel cause of map????On ebay theres a couple of map sensors but 4 mass air cars 91 and 89 5.0 sorry i cant type

 

D

Daggar

New Member

Jul 19, 2004

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Sep 13, 2004

#7

• Sep 13, 2004

• #7

Is the MAP sensor off of the 89?? Cars equiped with a MAF conversion typically retain the MAP sensor but you're right... they don't have the vac hose hooked up to it. Only the electric side is used and even then I think it's just as a pass through for the convienience of the harnesses. At this point, I'd have to guess that your problem is with either the MAP sensor itself or one or more of your 02 sensors is bad. Either way, they can often be checked out at your local autoparts store. I believe that the part numpers for the MAP sensors are the same, MAF or SD.

 

88hatchblack

New Member

Jul 25, 2004

163

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Willard, Ohio

Sep 13, 2004

#8

• Sep 13, 2004

• #8

speed density=use MAP sensor (hook up vacuum line); mass air=don't; still got problems--prob bad MAP. you can new 1 from local Ford dealership. make sure evrything's right wiring before you get a new sensor.