what damage would reversed coil wires do.
They should be 2 blue to + and 2 red/white to -.
But they where not and have damaged something
What damage would it cause if were 1blue, red/white to + and 1blue, red/white to -.
No spark. Have changed to correct blue +, R/W -
No fuses are blown but have no spark and need to trace back why and where.
New ICU and ECU but still same. What and how should I check?
Volvo 2.0ltr 1993 lh 2.4
Bosch 0227 400 176 ICU
Jetronic 0280000949 ECU
Initial problem started in March 2020.
Car drove to MOT test centre fine for test, but won't start for technician.
They tried a few things and tested a few theories ( this i think resulted in someone putting back wires on coil wrong way round)
Every ignition part changed at least once to new or (volvo 2nd parts as new not available)but nothing made engine run right. code 121 all the time. Wiring continuie checked by auto electrican, last major component changed ECU( had circuit board cracked). Then engine ran but differently. No code 121 anymore
Engine rang 30 sec (rough) then stopped , no spark. Wiring checked again for continuie (then COIL reversed wires error picked up on wiring diagram.)
2nd hand ECU AND ICU FITTED BUT STILL NO SPARK.
Fuel pump relay swapped no spark
MAF swapped still no spark
Coil amplifier swapped , SPARK ( engine tries to run but seriously rough and dies)
Engine now has code 121 (yes Maf however fault ECU will also create this code)
So what components do I risk next, MAF , ECU or ICU
They should be 2 blue to + and 2 red/white to -.
But they where not and have damaged something
What damage would it cause if were 1blue, red/white to + and 1blue, red/white to -.
No spark. Have changed to correct blue +, R/W -
No fuses are blown but have no spark and need to trace back why and where.
New ICU and ECU but still same. What and how should I check?
Volvo 2.0ltr 1993 lh 2.4
Bosch 0227 400 176 ICU
Jetronic 0280000949 ECU
Initial problem started in March 2020.
Car drove to MOT test centre fine for test, but won't start for technician.
They tried a few things and tested a few theories ( this i think resulted in someone putting back wires on coil wrong way round)
Every ignition part changed at least once to new or (volvo 2nd parts as new not available)but nothing made engine run right. code 121 all the time. Wiring continuie checked by auto electrican, last major component changed ECU( had circuit board cracked). Then engine ran but differently. No code 121 anymore
Engine rang 30 sec (rough) then stopped , no spark. Wiring checked again for continuie (then COIL reversed wires error picked up on wiring diagram.)
2nd hand ECU AND ICU FITTED BUT STILL NO SPARK.
Fuel pump relay swapped no spark
MAF swapped still no spark
Coil amplifier swapped , SPARK ( engine tries to run but seriously rough and dies)
Engine now has code 121 (yes Maf however fault ECU will also create this code)
So what components do I risk next, MAF , ECU or ICU
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