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Oil burning/computer problem info needed!

  • Thread starter Thread starter mjh304
  • Start date Start date Feb 22, 2004

mjh304

Founding Member
Nov 30, 2000
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Clearwater, Florida
Feb 22, 2004
#1
  • Feb 22, 2004
  • #1
In an '89 mass air system, what problems could there be with the computer system (including the mass air meter, fuel injectors, etc.) that would cause a cylinder "wash out" scenerio? I've got a 347 stroker motor, and am burning a ton of oil. I took an A9L computer from an '89 mustang, along with it's wiring harness, mass air meter, etc. I have since upgraded to 30# injectors, and a Ford Racing 70mm mass air meter calibrated for the 30# injectors. We have been dealing with this for years now (literally) and have no clue why it's burning. I had it rebuilt a few times now, so we are dead set on it being something other than mechanical with this stupid thing. We think (an R+D guy from ford is helping now, in addition to my pro. engine builder) that I may be giving a ton of fuel at idle, thus washing down the cylider walls, not allowing the piston rings to seal efficiently, allowing the oil to sneak right up into the cylinders. The ford R+D guy thinks that I'm not getting the correct "transfer function" with my mass air sensor. What does everyone think about this? And are there any other thoughts or suggestions??? ANYTHING!!! I don't know of my O2 sensors being changed any time recently, does anyone think this may have something to do with it...maybe not reading correctly or something? I've had it up to hear with this car, but have spent soooo much money on it that I just can't give up! Please, please help me!!!
 

bhuff30

Founding Member
Dec 11, 2001
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129
Olathe KS
Feb 23, 2004
#2
  • Feb 23, 2004
  • #2
I always though the computer would freak out if you increased the displacement. The load calulations are totally different when you increase the displacement.
 

mjh304

Founding Member
Nov 30, 2000
578
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Clearwater, Florida
Feb 23, 2004
#3
  • Feb 23, 2004
  • #3
Havn't a ton of people done this kind of motor though, with the stock computer? There has to be a way.
 

jrichker

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Mar 10, 2000
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Dublin GA
Feb 23, 2004
#4
  • Feb 23, 2004
  • #4
I would replace the Ford MAF with a Pro-M one. The Pro-M MAF will be a better match foryour setup, and Pro-M will custom match your injector size to the meter for a better transfer function. I would also think seriously about using some 24 lb injectors as well. See http://pro-flow.com/
 
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