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Author
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Topic: A9L computer questions
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bentley mobs a stang
¯
Member # 11119
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posted
 
 
I currently have an A9P in my 5 speed 1990 5.0. I know the A9p is for autos, and I have a hanging idle and o2 fault stored, which I heard is common when installed in a 5 speed. I know the correct ecm for my car is the e9 (89) prefixed A9L, but will the f3 (93) A9L will work just the same?
Also I saw there are different p/n's for hard tops and verts. Will a vert a9l work okay in my 90 notch?
Never new there were so many versions of the A9L until now.
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We're here for a good time, not a long time.
Posts: 531 | From: East Bay | Registered: Jul 2011
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racsirx
CAFords OG
Member # 1710
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posted
I like running the auto computers with 5 speeds more aggressive timing but I never had a drivability problem, maybe hit up Mustangguy and see what he says.
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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
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GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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bentley mobs a stang
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Member # 11119
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posted
Its funny u say that. I heard that the fuel duty cycle curve (injector timing and on-time length) is greater with auto computers as well (to compensate for the sluggish AOD) BUT I heard that a federal emission (instead of a california emission) A9L has the same effect as a A9P. I tried to find anA-1 cardone reman. Unit but they are unvailable.
Ill hit uo mustangguy for his input. Thanks bro! ![[patriot]](graemlins/patriot.gif)
Any other input guys?
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We're here for a good time, not a long time.
Posts: 531 | From: East Bay | Registered: Jul 2011
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triple b
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Member # 8763
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posted
research it you need to change your o2 sensor harness to match the ecu or you may fry the ecu...happens but not on all swaps and the harness should fix any hanging idles too but usually that happens on a auto ecu it hangs to allow the converter time to lock switch gears at a stop.
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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