Could my computer be bad?
sorry for the long post
ok here is the deal... I changed my opti because i developed a no/hard start condition with my old
one. Come to find out when i decided to remove the opti, the bearing was shot. The car
would start up but it would take a lot of turning. I bought a new reproduction opti off of ebay and
installed it and i got no spark at all.I checked A/Csignal voltage from the opti to the icm while
cranking and got almost nothing .0032a/c. I pulled the computer and checked for continuity to all
4 wiresbetween the opti and computerand all 4 were good.Im getting 12v throughthe opti
harness and if i disconnect the harness from the opti with the key on i can hear the fuel pump
cycle.I checked continuity on the white signal wire going to the control module and is good.I
checked all fuses and all were good.
I figured i got screwed with this opti, so iwent and bought a remanufactured opti and installed it
and i am having the same problem, the motor will turn and turn but no spark and no signal
voltage. So far other than the opti i have installed a new control module, map sensor, and
ignition coil. Im keeping the battery charged up good. My car has been dead since thanksgiving
and i have done everything i know. I dont want to take it to a shop because i cant afford to be
raped for hundreds or thousands of dollars on top of what i have already spent. So some advice
would be appreciated. Thanks!!
ok here is the deal... I changed my opti because i developed a no/hard start condition with my old
one. Come to find out when i decided to remove the opti, the bearing was shot. The car
would start up but it would take a lot of turning. I bought a new reproduction opti off of ebay and
installed it and i got no spark at all.I checked A/Csignal voltage from the opti to the icm while
cranking and got almost nothing .0032a/c. I pulled the computer and checked for continuity to all
4 wiresbetween the opti and computerand all 4 were good.Im getting 12v throughthe opti
harness and if i disconnect the harness from the opti with the key on i can hear the fuel pump
cycle.I checked continuity on the white signal wire going to the control module and is good.I
checked all fuses and all were good.
I figured i got screwed with this opti, so iwent and bought a remanufactured opti and installed it
and i am having the same problem, the motor will turn and turn but no spark and no signal
voltage. So far other than the opti i have installed a new control module, map sensor, and
ignition coil. Im keeping the battery charged up good. My car has been dead since thanksgiving
and i have done everything i know. I dont want to take it to a shop because i cant afford to be
raped for hundreds or thousands of dollars on top of what i have already spent. So some advice
would be appreciated. Thanks!!
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Christophern
Computer & Fuel Systems
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Nov 29, 2010 11:04 PM




