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1987 Ford Aerostar misfire, shuts off

Tiny
DMCCULLOCH
  • MEMBER
  • 1987 FORD AEROSTAR
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
The van turns over but misfires after a few seconds. It will then shut off but I can start it up again. There's hesitation as the engine is running. New distributor, coil, plugs, computer. Please guide me as to what else could be causing this issue. Tx john
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Saturday, April 26th, 2014 AT 1:44 PM

13 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try checking the fuel pressure if its within specs-start here
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Saturday, April 26th, 2014 AT 1:54 PM
Tiny
DMCCULLOCH
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All ignition parts have been changed including distributor which was removed and disturbed for the replacement. I followed procedures: compression stroke #1 top dead center, dropped in distributor, fired but now there's current being displaced causing the engine to want to shut off at certain points while running
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Saturday, April 26th, 2014 AT 2:00 PM
Tiny
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Where is the EGR located on this engine?
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Saturday, April 26th, 2014 AT 2:18 PM
Tiny
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Did you make sure the rotor is pointing to the cap's no.1 position-The EGR valve is on the left fender apron
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Saturday, April 26th, 2014 AT 2:29 PM
Tiny
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Compression stroke is top dead center, rotor pointing to is on #1 position but not sure if distributor gear is in proper alignment with PIP. Could I be off a tooth and if so, which direction should I go? Tx
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Saturday, April 26th, 2014 AT 2:43 PM
Tiny
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Could be take it back out and re-align and try again-What about the fuel pressure is it up to snuff-
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Saturday, April 26th, 2014 AT 3:07 PM
Tiny
DMCCULLOCH
  • MEMBER
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Fuel pressure regulator and pump are new with relays.
It seems this van has no EGR? I know what they look like but could never locate one on the engine and finding out many 87 owners don't have one as well was a surprise.
I'll retrace my steps again and get back to you but if there's any other possibility please let me know what else I can try. Tx john
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Saturday, April 26th, 2014 AT 3:12 PM
Tiny
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Also check the TPS and MAP sensosr
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Saturday, April 26th, 2014 AT 10:45 PM
Tiny
DMCCULLOCH
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TPS is good, how do I test the MAP sensor? Tx
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Sunday, April 27th, 2014 AT 8:59 AM
Tiny
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Ok, I just looked up a video on testing the MAP sensor so I'm gonna give it a shot.
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Sunday, April 27th, 2014 AT 9:24 AM
Tiny
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Just bought a new MAP sensor and installing now, I got a code when I tested the old one so I hope this resolves the issue, will let you know. Tx john
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Sunday, April 27th, 2014 AT 12:49 PM
Tiny
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Ok, so van has much better power when running BUT I'm still getting a misfire and hesitation, not as bad as before and I drove it a few miles and back. With the power I have now it was good I changed out the map sensor, I just don't know why it's still misfiring?
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Monday, April 28th, 2014 AT 7:46 AM
Tiny
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Raz, just drove it and damn thing shut off 2x! I now have a code 61
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Monday, April 28th, 2014 AT 9:50 AM

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