Just drove to virginia and bought this dirt track race car
its a CRX with a ZC engine
the owner stated that it has no spark
so getting ready to start troubleshooting and kinda need a direction to point in

 

look over the ignition system....

stratton

 

Test the igniter.

I have a bnib OEM one for a good price.

 

Yep, ICM, coil and check PGM-FI Main Relay for injector power output, it also supplies power to the ECU. IGP1 and IGP2, both must have power. 94

 

how do you test the ICM?
what is IGP1 and 2?

 

Do you have a Digital Multi-meter?

 

IGP1 and IGP2 are 12V inputs to the ECU from the PGM-FI Main Relay, they turn some functions of the ECU "on" 94

 

Guy has pretty much made a hackjob of the harness
I just need the basics so the engine will run
looks like a long hard road ahead unfortunately

I hooked up the battery and was going to run some tests
I turned the key on and the main relay began clicking really fast and a light on the ECU was blinking as it clicked

I do have power to connector B of the ICM

what are these 2 wires?

 

Just found thermostat ground wastn connected , that problem amended
maIn relay stopped clicking still no spark

I tried to check the coil I got a reading of .9 which was out of the range
I tried to get the other reading but not sure what setting to put ohmeter on

 

ECU throwing code 10 - 13 and 20
I "believe all from unplugged circuits this guy has a wiring mess
its just a bare race car would my best best be to get an engine harness or body harness from a junkyard?
dont you have to modify the stock CRX harness for ZC swap?

 

how much you need to modify depends on whether the original harness was for a DPFI car or MPFI car

DPFI - you need to use the original DPFI engine harness and add wiring for the injectors, add injector resistor box and add wiring for the cylinder sensor

MPFI - you need to use the original MPFI engine harness and change the connector at the distributor and extend the wires for the cylinder sensor, which is on the end of the exhaust camshaft

 

This car is a basic she'll
How can I determine if it's a mpfi or dpfi harness

 

on the passenger side where the engine harness connects to the chassis harness, the MPFI harness has (3) connectors like the picture below - the DPFI has only (2) connectors - the one with the red arrow (10-pin connector) is not there on the DPFI

 

ran a series of tests today
Coil IS getting power and is within specs
I am purchasing an LED test light to check ICM signal and determine if its bad or not
only thing left other than ICM is the cam angle sensor

any input?

 

Will a faulty or disconnected cam angle sensor cause no spark?

 

Can anyone tell me what these wires are?
They come out of the distributor
Would like to know their purpose


http://s32.postimg.org/aa3axkrgl/imagee.jpg

 

Been testing around with the test light and found something quite odd
The distributor case anywhere has power, the test light lit up
So I got the multimeter and tested the power lead 12.5 volts
Anywhere in the case I get 7 volts
Something has to be shorting inside this distributor

 

bought a new distributor no change
it seems the ECU isnt generating a"switching" signal to the igniter

 

Have you tested the harness it self? Checking for continuity between ends?

 

Yes sir Ive checked the distributor wires that run back to the ecu

 

running out of options

 

OK, back to basics, check/redo your main grounds, batt. to chassis and chassis to engine, DO NOT just eyeball them, disconnect/clean/reconnect.

Also, did you confirm power at IGP1 and 2??? 94

 

With a good bit of searching I can't find where exactly igp1 and 2 are
Would like to test them to see if they indeed have power

 

What ECU are you using? 94

 

got it up and running! that was insane lol
now got 4 codes to deal with argh
code 9 /10/13/20
wow