ok i just recently purchased this 1991 civic 4dr 5spd, it has a dohc zc non vtec motor swap in it but the issues im experiencing, it turns on and shuts right off if the Cam angle sensor is plugged in and when i unplug it it turns on and stays on and works fine, then the other issue is it bogs out at around 3500 rpm, it wont go high it throws a check engine like for code 4 which is for the unplugged sensor, but im not sure if its the sensor or the timing or the distributor, i need help figuring this out, how can i tell what the problem is when i rev it , it revs out at like 3500

please give me some advice...

 

sounds to me like a wiring problem

the sensor on the end of the exhaust camshaft is the CYLINDER SENSOR - if it is not wired up correctly, you will get a check engine light and a Code 9

the Code 4 is for the CRANK SENSOR which is inside the distributor - with a Code 4, the engine will not rev beyond about 3500 rpm - you either have a bad distributor or the wiring for the distributor is not correct

 

well its probably the distributor or the wiring cuz the guy i got it from said he had got a dist. from a junk yard he got it off a 87-88 integra and had this electrician guy make him a harness adapter for the distributor where should i start

 

i assume that the car was originally a DPFI car, like DX or LX - is this correct?

if it was DPFI, nothing should have been done to the distributor connector - the DPFI engine harness distributor connector plugs right into the DOHC ZC or 88-89 Integra distributor - should be a rectangular 6-wire connector with 5 wires

as a part of the DPFI to MPFI wiring changes, 2 new wires needed to be run from the ECU to the CYLINDER SENSOR, along with the added fuel injector wiring - these wires need to be running from ECU pin C1 to the Blue with green stripe wire on the CYLINDER SENSOR and from ECU pin C2 to the blue with yellow stripe wire on the CYLINDER SENSOR

when the DPFI to MPFI wiring changes to the chassis harness were done, the orange wire at ECU pin C1 should have been moved to ECU pin B10 and the white wire at ECU pin C2 should have been moved to ECU pin B12 - the orange and white wires at these locations are for the CRANK SENSOR

not knowing what was done, i would get a multimeter and check continuity on the wires - check to see if wire at C1 is going to blue/green and if wire at C2 is going to blue/yellow at the CYLINDER SENSOR - check to see if the wire at B10 is going to the orange wire and B12 is going to the white wire at the distributor - note that there are 2 white wires at the distributor connector - you need to be checking the white wire that is between the orange wire and the empty pin on the distributor connector

if the car was the EX model with MPFI, i can also tell you what needs to be done with it

 

ok it is a lx he left a extra distributor in the car , the one thats was on the car when i bought it has 1 round plug and 1 rectangular plug and the extra one in the car has 2 round plugs one small one big which one of these should i be using and the harness that he go made for it was for the distributor on the car which is a rectanular plug and big round plugand has a extra plug going to the cylinder sensor

 

ok i took some pics of the wires and plugs here they are

here are the plugs coming for the cars harness


and these are the plugs on the distributor that was on the car when i bought it


and this is the harness he had made for it, the 3rd plug (green) goes to the cylinder sensor plug

 

from the pictures, the original LX engine harness has been modified with the round 8-pin, 7-wire Si/HF connector swapped onto it - probably for a previous SOHC MPFI swap

the distributor you need is a model TD03U - this number should be stamped on the side of one of the attaching arms - it should have (unless someone changed it) a round 2-wire female connector and a rectangular 6-wire female connector that has 5 wires in it - i suspect that the one that was on it when you got it is correct

if it were mine, i would depin the wires from the rectangular 6-wire connector on the jumper harness, then depin the wires and remove the round 8-wire connector on the engine harness and then install the rectangular connector onto the engine harness - when installing the rectangular connector on the engine harness, install the wires so that they all match color for color with the wires on the distributor side of the connection - since it was originally DPFI which had no wires for the CYLINDER sensor, i don't know what color wires were used from the ECU, but the 2 wires that don't match the distributor wires are the ones needed for the CYLINDER sensor - you will need to check continuity on the wires to see which one goes where at the ECU

 

So what do u recommend i do rip out the entire harness from the car and replace it with the right one, which one is the right one that will go on this motor the one out of the 88 integra?

 

nope, the correct harness is the stock one. the only right way to do it is modify what you have. as jlicrx has already kindly explained to you how to do.