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Any Codes? Is the Anti-Theft light lit? Did you disconnect the battery recently? A high level scan tool should tell you if sensors are faulty.Any Codes? Is the Anti-Theft light lit? Did you disconnect the battery recently? A high level scan tool should tell you if sensors are faulty.
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you haven't given which make , model,year of engine type of fuel pump, make of fuel pump and the only clue is the flywheel
the injection timing mark is normally denoted as a lightning symbol and you will find it anywhere between 14 degrees btdc to 22 degrees btdc
or it will be set at the degrees btdc r recommended by the manufacturer
It has to be exact because after that mark will be down on power and too far advanced will melt pistons
Sounds like you could have an aux air regulator valve, that is not
working when it will not work; there is no fast idle cold. Should be around 1500 rpm cold, the car will stall out and pop through the intake when bad. You have a digital volt meter to do some testing with to make sure the mass air flow is working correctly. Also, check the plugs for how they're burning, check the air filter for good flow, do a compression test and judge from there. Intake backfire is usually caused by running lean or improper timing.
For the 79 model zx, ignition timing was 10 degrees BTDC @ 700rpm For 80 and up zx, non turbo - 8 degrees BTDC +- 2 degrees @ 700rpm turbo - 20 degrees BTDC +- 3 degrees @ 700 rpm
Also done with distributor vacuum advance hose removed and plugged. NOTE: * BTDC = Before Top Dead Center * + - = Plus or minus
Hope thos helps; keep us updated.
IGNITION TIMING IS 13 - 17 DEGREES BTDC AT 650 - 750 RPMS. YOU NEED A TIMING LIGHT.TO SET TIMING FIRST CHECK FOR ANY TROUBLES.MAKE SURE YOU HAVE NO CODES. NOW TO SET TIMING.APPLY PARKING BRAKE AND BE SURE THAT THE CAR IS IN PARK.START AND RUN ENGINE UNTIL IT GET OPERATING TEMPERATURE.RUN THE ENGINE ABOUT 2000 RPM FOR 2 MINUTES UNDER NO LOAD,TURN OFF ALL ELECTRICAL LOADS, DISCONNECT THE THROTTLE POSITION SENSOR ELECTRICAL CONNECTOR,BE SURE THE ENGINE SPEED IS 700 - 800 RPM. REV THE ENGINE 2 OR 3 TIMES TO 2000 - 3000 RPM AND RETURN THE ENGINE TO IDLE SPEED.CONNECT A TIMING LIGHT TO THE NUMBER 1 CYLINDER SPARK PLUG WIRE AT THE DISTRIBUTOR END AND CHECK THE IGNITION TIMING BE SURE THAT THE TIMING POINTER IS POINTING TO THE 15 BTDC MARK ON THE CRANKSHAFT PULLEY,EACH NOTCH ON THE CRANKSHAFT PULLEY REPRESENT 5 DEGREES. IF THE TIMING IS NOT WITH IN THE SPECIFICATION, LOOSEN THE DISTRIBUTOR MOUNTING BOLT AND ADJUST THE DISTRIBUTOR UNTIL THE TIMING IS AT PROPER SPECIFICATION. TIGHTEN THE DISTRIBUTOR MOUNTING BOLT TO 10 - 12 FT LBS,STOP THE ENGINE AND CONNECT THE THROTTLE POSITION SENSOR.
the timing is controlled by the engine computer. You only set the base timing at 15 degrees by loosening the distributor hold down bolt and turning the distributor until the timing light shows on the 15 degree mark on the crank pulley.
The firing order is 1-5-4-8-6-3-7-2, distributor turns counter-clockwise. The ignition timing can be set using marks on the vibration damper. The wide mark is TDC (Top Dead Center), each mark after the wide mark represents 2, 4, 6, 8 and 10 degrees before TDC. Set timing 3 degrees BTDC (Before Top Dead Center). In addition, valve timingis set like this: Intake opens: 12 degrees BTDC Exhaust Closes: 8 degrees ATDC
I think one must adjust the timing by advancing or retarding the ignition timing, not by adjusting the timing light.
If you are trying to set the BASE timing, you probably need to connect the orange/red and green/white wires of the blue service check connector with a jumper wire. The blue service check connector is located on passenger side under the dashboard.
The timing mark for this vehicle is on the flexplate / flywheel, and is usually located by removing a little rubber stopper or lifting off an inspection cover.
The timing is PROBABLY 15 degrees BTDC +/- 2 degrees. Be aware that many hondas PRIMARY ignition mark IS 15 degrees BTDC, NOT ZERO... so when you line the pointer and the flash up with the line, it is properly adjusted.
DISCLAIMER: I am (clearly) not a certified auto mechanic. Go check out and read a service manual from your local library. Your mileage may vary...
CAUTION: Parking brake control should be applied. Depress the parking brake pedal, and warm the engine to the normal operating temperature.
Turn off all electrical loads.
Start the engine and rev it to 2000-3000 rpm two or three times and allow the engine to return to the idle.
Check the idle speed. The idle speed should be between 700-800 rpm in PARK (P) or NEUTRAL (N) position.
NOTE: Make sure that the timing pointer is pointing to the 15° Before Top Dead Center (BTDC) mark on the crankshaft pulley. Each notch on the crankshaft pulley represents 5 degrees. Check the ignition timing with a timing light.
If the marks are not aligned, loosen the distributor bolt and turn the distributor to make the adjustment. The ignition timing should be between 13°-17° BTDC.
CAUTION: Parking brake control should be applied. 
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