I got a 95 cavalier ls 2.2L with a manual transmission.Ive recently swapped in a 2.3 quad 4 H.O and ran into some problems on the wiring.One problem is finding the factory harness out of a 95 z24 is like trying to find a needle in a hay stack, and finding the ecm pinout is just a bad. I already have the 2.3 ecm but the car wont run off it.I modified my origional 2.2 harness to run the 2.3 had to solder on some new connectors for the map sensor fuel injectors and extend a few wires due to their new location,all that was nothing.where my problem lyes is the 2.2L uses a 3 wire ckp sensor and the 2.3L uses a 2 wire ckp sensor.The motors running off the 2.2 ckp but its not right.Ive got the ckp sensor rigged in on the motor to make it run.I had to use coil packs to make it run but I like that better anyways.but if anyone knows a way around wiring the ckp sensor your advice would be greatly appreciated.also any links for th ecm pinout would also be appreciated, thanks.
so youre running it off the 95 2.2 tune?
why not just swap in a 97-98 LD9 harness/ECU?
problem solved.
If it takes forever.... I will die trying. Underdog Racing
ecm pinout of the 95 is in the haynes manual. thats what i used to swap to 95 ecm. isn't the ckp sensor from 95 2.3l 2 wires? if so it should be good with its own ecm....
and i thought the 2.2 and 2.3 shared the same ecm in 95, just different eprom.
the car itself wont run off of the 2.3 ecm Ive tried it several times.I was considering the ld9 harness and ecm but being as how my engines obd1 I dont have a cam position sensor .I know I could change cam tower to one off of a 2.4 but then I would have to tear down the engine and swap intake cams power steering and have just as much trouble.I do believe the ecms are the same in 95 though.They do just use different eproms for the different fuel curves.the problem I have though is two sensors sends out two types of signals the three wire ckp sends its reference pulses in ac.where as the 2 wire sends its reference pulses in dc.also the two wire sends a ground signal to the ecm.where as the three wire sends a positive signal thats what I believe is the difference on why it will run off the 2.2 ecm and not the 2.3.but I am curious if I could just swap eproms and make it work?
you dont need that cam sensor, it will run fine without it.
If it takes forever.... I will die trying. Underdog Racing
same ecm if its a manual trans.
Just curious the Ld9 is obd2 if im switching both ecm and harness wont the ld9 ecm be looking for the cam sensor.I know the cam sensor controls the fuel injectors without that sensor the car wont run.right?also what other sensors would I need to make the car run right.I know obd2 uses 2 o2 sensors.
cam sensor indexes the SFI, but if its removed it defaults to MPFI.
Will it throw a CEL without it ? also will I need a second o2 sensor or any other sensors for that matter to make it run properly without a CEL
if you remove any of the sensors you will throw a CEL, if you create an unfavorable condition you will throw a CEL. You can simulate the downstream O2 signal but the cam check will definatly do it.
just go get a 95 quad harness in teh yard they really arent all that hard to find like they used to be.
Ive searched the yards for a 95 harness they are not easy to find.expecially in a manual.ive searched car-parts.com they never update their site and ive probably sent out over 50 junkyard requests no one wants to part with the harnesses.I had purchased one for 200.00 before I even started the swap and the guy said it got lost in transit.so trust me, if it were that easy to find I would have it already.on the bright side the dealership has 10 of them. For 1600 dollars though lol.I am seriously consideringing the LD9 harness but I have another question.what happens with the wiring to the egr valve.as you know the 2.3 doesnt have one .will the car run right without it.also if anyone has the harness for a 95 z24 or sunfire gt 2.3L I will gladly pay 200 for it plus shipping but it needs to be a manual tranny though.but anyways thanks for your help I appreciate it.
