1g in a 2g - Magnus Motorsports
Contents
1. Parts List IG CAS 91 92 Optical Effect 93 94 Hall Effect IG Oil Cooler 90 92 MD 157670 6bolt water cooled oil cooler G Water Pump G Oil Pump Front Case G Timing Belt necessities 2G Engine mount modified use 2G engine mount trimmed with G tensioner arm G Timing Belt Covers modified I G 90 92 6 bolt block with whatever internals G 6 bolt Flywheel 2G Starter Mounting bracket G Water Pipe G lower radiator hose G Thermostat housing Water Neck G 6 bolt oil pan Balance shafts remove them or keep em its up to you we take them out 2G Alternator 2G Power Steering Pump 2G A C 2G Belts amag motorsports Additional Notes On a 95 96 car with stock 2G head e Swap Plugs and 4 with 2 and 3 order is not important On a 97 car with stock 2G head e No plug swap or injector swap is necessary For a complete IG 6 bolt head block Swap 2G ISC with IG Throttle body G Coil pack and bracket G Head with internals G Intake manifold with stock 2G knock sensor Reuse 2G sensor including oil water temp etc 2G fuel rail to accommodate 2G Fuel Pressure Regulator 2G MAP sensor either in Intake Mani or T d off of Brake booster Vac line Relocate power transistor mount Special thanks to the whole DSM I Gina2G list members who have helped in providing the useful information needed to compile this detailed list Sean Caron for providing the car and motivating me Justin and Robert from the RRE crew who2. mag motorsports So here it is finally an easier way for you 2G owners to get away from the dreaded crankwalk It seems this was the answer most of you wanted so we found a solution on how to mate the G motor utilizing the G cam and crank sensor trigger assembly to the stock 2G computer Using this fix will also alleviate the weak timing that has always plagued the 2G s 4 6 degrees retarded on the 95 96 97 up is very timing sensitive to airflow based on turbo size but base idle timing can be adjusted There have been some questions regarding being able to use the tensioner tool Because we are mating a G tensioner arm to a 2G engine mount the holes for the tensioner tool no longer line up the tensioner must now be compressed manually 2g power steering cj ki bracket 1g oil pump and cover 1g oil pan amag motorsports i Slightly trim here on the 2g mount E y i You can see where the 2G mount must be trimmed to clear the G water pump the only cutting involved amag motorsports 29 cam sensor removed k amp E don t forget fg tranny starter plate and 6 bolt flywheal location Pictured here is a JDM Galant sensor we like it because the wires can reach all the way to the engines drivers side and no need to go hunting for a connector Plus we have about 20 sitting on the shelf same as a 1989 90 unit apparently Wiring from 1g cam sensor that will lead to the 2g harness
3. Yellow w black stripe Pin 14 is now Pin I5 Refer to the final page of this document for all ECU pin allocations The spark coil signal is inverted Looking at the coils label each wire A B C D Change the spark plug wire locations A is now C B is now D C is now A and D is now B Another way to do this is to change the trigger wires to the coil 3 wire triangle plug next to the igniter Switch the two blue wires One is blue with red stripe the other is blue with black stripe The third wire that remains unchanged is black with white stripe 2 Bend or remove any brackets that would get in the way of the installed G CAS 3 If you have a 2G head remove your 97 99 CAS or remove the rubber coated metal cap from the left end of the intake cam on your 95 96 4 Rotate the motor to Top Dead Center TDC 1 cylinder The cam alignment pins will be at 12 00 The timing marks will be lined up at 3 00 on the exhaust cam and 9 00 on the intake cam Those two marks will be lined up directly through the centerline of the cam bolts in the center of the pulleys 5 Align the marks on the IG CAS to TDC and Install Set the CAS at its mid range of adjustment nal i f Lined up 180 degrees out Lined up correct for TDC 6 Make sure the ignition key is off and the ECU fuse is pulled At this time make changes to your plug wires and injector wires if necessary Connect your custom wiring harness to the IG CAS Route the harness away from extreme
4. 300 seconds of steady state RPM less than 80 throttle position Engine coolant temperature 10C or higher Intake air temperature 10C or higher Barometric pressure greater than 76 kPa Now if we can get one of these values outside of the criteria the ECU won t check for misfires The value that would be the easiest to change would be the barometric pressure sensor We re going to add resistance to this value so that the ECU will see less barometric pressure than what there really is This will also lean the car out so you should see a performance increase as well Depending on the car and altitude you might need to add more fuel with an AFC So let s get started Parts needed e A IOK potentiometer although a 5K would probably do just fine These are available at any electronics store if you go to Radio Shack ask for a volume control knob because they don t know what a potentiometer is e Wire strippers e Soldering iron Step I Remove the access panel on the driver s side of the center console You should now see four plugs with a ton of wires going to them Step 2 Pull out the top plug it ll be the one that s the hardest to reach Locate wire 85 It s orange with a white stripe Step 3 Cut the orange wire in half Solder one end of the wire to the center peg of your potentiometer Solder the other end to either the left or right leg it doesn t matter which Turn your potentiometer all the way counter clockwise Ste
5. heat possible noise generators spark plugs coil s alternators etc Behind under the intake manifold works fine 7 Replace the ECU fuse and start the car Setting the base timing I Connect a timing light to battery power and and the Number spark plug 2 Connect a data logger to the car and display timing advance and RPM 3 Allow the car to come up to temp Coolant 212 deg F 750 RPM 100 Fan s should cycle on and off 4 Read the timing from the crank with no load on the motor Each mark is 5 deg no fans no lights no A C etc 5 Adjust the position of the CAS until the readings from the TIMING LIGHT match the timing advance displayed on the data logger This is stock advance If you have a mild setup with stock cam s you ll pass the smog inspection if your ECU timing and crank timing reads 5 deg 3 deg BIDC at idle 6 Add additional timing at own risk Timing light advance ECU advance Base Timing Shift see The bad 7 Tighten the 2mm nuts bolts that hold the G CAS amag motorsports Troubleshooting IF CHECK ENGINE LIGHTS OCCUR TRY THIS Many people using the G CAS on a 2G head have been running into problems with misfire engine codes while at cruise Many different things have been blamed for this and many different fixes have been attempted This fix will keep the ECU from looking for misfires at all This is the criterion that must be met before the ECU will start to look for misfires
6. ediate pressure switch 3 Check Engine light 7 8 5 6 AC switch Engine transaxle general control torque execution signal Power steering pressure switch w w w w w w w w Oj uj gt N MFI relay power supply Connection onnection 8 Engine ignition signal O Oi Ail AJ Gy Gy MN Os vjl BR WwW N On U1 Oy Mm N O N O 2 sensor heater rear 2 sensor heater front Connection onnection l 2 3 Ignition switch ST 3 4 5 Intake air temp sensor Coolant temp sensor Manifold differential pressure sensor Throttle position sensor Barometric pressure sensor O2 sensor rear Vehicle speed sensor 7 8 O2 sensor front Closed throttle position switch Idle switch Camshaft position sensor Crankshaft position sensor Volume air flow sensor Backup power supply Park Neutral position switch used on ATs only NI NI NI N NIN NIN N GERERDEDENDE S 2 8 S 8 S 2 2 3 2 8 7 N Wil Sensor impressed voltage 2 Ignition switch IG
7. fought hard when they were cutting oil pump covers no more just bolt it in with hand tools motorsports Installing a IG Cam Angle Sensor in a 2G Anatomy of a Cam Angle Sensor There are three types of cam angle sensor that are known to work The early years 89 92 have a metal green gray cover use a flat rotating disk with slots and an optical sensor The later year sensor 93 94 has a black plastic cover uses curved metal plates that rotate through a hall effect sensor The hall effect sensor is physically similar to the technology used in the 95 96 cam and crank sensors Theoretically the hall effect sensor is higher resolution They all work 89 90 MD1I21786 Green Lid Optical Type Long Wire Harness 91 92 MD148855 Green Lid Optical Type Plug Harness 93 94 MD 184529 Black lid Hall Effect Type Plug Harness motorsports Cam Angle Sensor Wiring Diagrams 1G Cam Angle Sensor plug or wires i O Build this wiring harness to connect a 1G cam angle sensortoa2G ECU The 1G Cam angle sensor will provide both cam and crank signals White Yellow Black A really simple option is to purchase a IG ina 2G adaptor harness from Magnus Motorsports It s available for Black aii both 95 96 and 97 99 models It will rid all the hassle of re wiring and provide a clean factory appearance i with factory dependability Red sl L Black not connected not connected For more details vis
8. it http www magnusmotorsports com 2G Cam Sensor Plug 2G Crank Sensor Plug Original concept Magnus Motor Sports Drawing by Justin DuBois for Road Race Engineering qat Gen Cam Position jnd Gen AAs sensar Cam Sensor JOM Galant 20 Sensors are Crank Sensor no longer Used but shown connected A EH loo Ee with dotted lines for RE E why yelpred bk reference ck 7 bk hlu f red ial I mil nd ee Marco Passante Wagnus Motorsport AOS 761 6142 2nd Gen Ecu Drawing Brian Tex YYilson agnus Wiring Instructions I Make a wiring harness Due to the inverted Cam signal injector trigger wires will need to be switch on 95 96 year ECU cars with this wiring diagram in order to bring the signals back into phase The difference is subtle but the motor will start easier provide smoother idle and have less hesitations during mild acceleration Use the following diagram 0 aao M a When removing the pins on your ECU wiring harness be patient and delicate It requires no force to remove the pins Consult the diagram in the front of your electrical service manual regarding the proper way to inspect and remove pins You will need a tiny jewelers screwdriver 1 16 in to release a plastic catch holding the pin s in Use a flashlight and take a good look at the harness before beginning Green Pin is now 14 Green w yellow stripe Pin 2 is now Pin Green w red stripe Pin I5 is now Pin 2
9. p 4 Plug the harness back in and start up the car It should sound like it did before you did any modifications If the idle is choppy or the car won t run you turned your potentiometer the wrong way Step 5 Add resistance to the barometric pressure sensor by slowly turning the knob on the potentiometer Drive the car around if you get a CEL then add some more resistance Keep doing this until you no longer get the CELs ECU Pin Allocations PalConnecton nf Comnecn ey No Injector No 2 Injector No 3 Injector Fuel pressure solenoid 16 Boost meter Idle Speed Control ISC motor coil Al ISC motor coil A2 ISC motor coil BI 18 ISC motor coil B2 6 EGR Solenoid 19 Volume air flow sensor reset signal Engine transaxle general control torque reduction request signal Cooling fan motor relay high 8 Fuel pump relay Cooling fan motor relay low 9 Evaporate emission purge solenoid 22 AC compressor clutch relay 10 Ignition power transistor A to coil for cyl 1 amp 4 Ignition power transistor B to coil for cyl 2 amp 3 u Turbo wastegate solenoid Power supply Power supply Connection Z o A 3 p O ct O s N a BA BT AT BAT AT AT w IN nN oO mi A oO pre O a D O S n o x oO ca oO D oO s v O O D ct ER oJ ct O s A Cc oO y oO Q Cc AO ct O S ER oO A om n ct 2 0a v N 09 Generator G terminal Generator FR terminal AC interm
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