RonV8charmant
New Member
I have just attempted a coil on plug conversion on my 1uzfe with stock lexus ecu and it works! I have the 95-97 sequential injection version with the plastic air flow meter.
I did my engine conversion 3 months ago and i had an intermittent missfire in damp weather, I replaced the rotors and caps at a cost of 90 euro and was about to purchase a set of leads at 300 euros and decided to try the coil on plug trick ive seen done on the 20v 4age engines, I got 8 Lexus is200 cop's for free from a car dismantler I know
This is where I read about the c.o.p. trick on the 4age engines
http://forums.club4a....php?f=13&t=206
more info here
http://s-86.com/s-coilpacks.html
Here are a some pictures of the is200 coil on plugs fitted, I cut off the mounts with a small angle grinder so they would fit in the valleys, I still need to make some brackets to hold them down and i need to tidy the wiring, all the connections are soldered and shrink wrapped.
As the 1uzfe has two igniters I used them to trigger four coils each
The is200 coils are 4 pin
pin1. earth
pin2. igt
pin3. igf (not used)
pin4. switched 12v live
the earths from all 8 cop's were connected to a common ground on the chassis of the car, the switched live was fed to all 8 cop's, I connected the igt wires from cylinders 1 and 7 together with 4 and 6 to IGT1 on the 1uzfe igniter plug, I connected the igt wires from cylinders 2 and 8 together with 3 and 5 to IGT2 on the other 1uzfe igniter plug (i dont know if this is necessary, i just copied the way each distributer would have sent the spark to two cylinders on the left bank and two on the right bank) I still need to de-pin the igf wires from all the cop connectors as they are not used
Ive done approximately 40 miles as I drove it to work yesterday and today, no problems to report so far!
I did my engine conversion 3 months ago and i had an intermittent missfire in damp weather, I replaced the rotors and caps at a cost of 90 euro and was about to purchase a set of leads at 300 euros and decided to try the coil on plug trick ive seen done on the 20v 4age engines, I got 8 Lexus is200 cop's for free from a car dismantler I know
This is where I read about the c.o.p. trick on the 4age engines
http://forums.club4a....php?f=13&t=206
more info here
http://s-86.com/s-coilpacks.html
Here are a some pictures of the is200 coil on plugs fitted, I cut off the mounts with a small angle grinder so they would fit in the valleys, I still need to make some brackets to hold them down and i need to tidy the wiring, all the connections are soldered and shrink wrapped.
As the 1uzfe has two igniters I used them to trigger four coils each
The is200 coils are 4 pin
pin1. earth
pin2. igt
pin3. igf (not used)
pin4. switched 12v live
the earths from all 8 cop's were connected to a common ground on the chassis of the car, the switched live was fed to all 8 cop's, I connected the igt wires from cylinders 1 and 7 together with 4 and 6 to IGT1 on the 1uzfe igniter plug, I connected the igt wires from cylinders 2 and 8 together with 3 and 5 to IGT2 on the other 1uzfe igniter plug (i dont know if this is necessary, i just copied the way each distributer would have sent the spark to two cylinders on the left bank and two on the right bank) I still need to de-pin the igf wires from all the cop connectors as they are not used
Ive done approximately 40 miles as I drove it to work yesterday and today, no problems to report so far!
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