engine swap

1994 PONTIAC FIREFLY
200,000 MILES
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HTLOGAN
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  • 1 POST
swaped a 1996 1.0 lt 3 cyl engine with a crank sensor to a 1994 that had no crank sensor wired in the harness.
the motor starts up and idles perfect but will not rev up it starts sputering and even will backfire a little , is this bcause of the
crank sensor not being conected or should the motor run good without it , i swaped the intake manifold to match the wiring
harness can you help
May 20, 2013 at 7:38 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
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yes, the issue is the wiring harness. it needs a crank sensor to operate correctly

Roy
May 20, 2013 at 7:45 PM
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MAXIMILIAM
  • MEMBER
  • 436 POSTS
Reply from htlogan via email:

hi there, what can i wire in the crank sensor to cause there is no wire coming in from the computer on the 1994 firefly, the sensor is on the motor and i have the wires,,can you help?
May 21, 2013 at 11:46 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
you cannot wire in a crank sensor. It has to be part of the harness. You changed from obd 2 to obd 1. thats the real issue. Where is the crank sensor located??

Roy
May 22, 2013 at 4:28 PM
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