Question about 1984 Nissan 300ZX

1 Answer

Weak spark at plug end. 1984 300zx was sitting for 7 years when I decided to put it back together. I emptied the fuel replaced the pump and filter and replaced plugs and air filter. Should be a go but failed to start. I troubleshot it by checking for sparks from the ignitors and #1 cylinder had a faint spark but other 5 nothing. I checked the spark from the coil to distributor cap and its very strong. Somehow it weakens as it goes through the distributor. Can I replace the rotor or is it a photosensing diode or something else that I need to replace?

Posted by on

  • Zaraki Oct 14, 2010

    That sounds like the distributor cap and the ignition rotor and the ignition wires or "spark plug wires" are just worn out, and all of them should be replaced if that has not been done so yet. Yes, you can replace the ignition rotor and it is just an ignition rotor, however some after-market distributor caps were not produced very well, and they did not perform very well either, and they will sometimes perform more poorly than the worn out part that it replaced.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Nissan Master
  • 14,363 Answers

Did you check your fuse box inside the vehicle.

Posted on Apr 29, 2017

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
Ajkill
  • 2035 Answers

SOURCE: IGNITION FAILURE ON 280 ZX (82)

  1. Turn the ignition switch OFF. Disconnect the fusible link connector for the fuel injection wiring harness. Be sure the ignition is OFF before doing this. Disconnect the cold start valve wiring harness connector. Disconnect the high tension lead (coil-to-distributor) at the distributor and hold it 0.13-0.25 in. (3.3-6.3mm) away from the cylinder head with a pair of insulated pliers and a heavy glove. When the engine is cranked, a spark should be observed. If not, check the lead and replace as necessary. If there is still no spark, go on with the following system checks.
    1. Make a check of the power supply circuit. Turn the ignition OFF. Detach the connector from the top of the IC unit. Turn the ignition ON. Measure the voltage at each terminal of the connector in turn by touching the probe of positive lead of the voltmeter to one of the terminals and touching the probe of the negative lead of the voltmeter to a ground, such as the engine. In each case, battery voltage should be indicated. If not, check all of the wiring, the ignition switch and all connectors for breaks, corrosion, discontinuity etc., then repair as necessary
    2. Check the primary windings of the ignition coil. Turn the ignition OFF. Detach the harness connector from the negative coil terminal. Use an ohmmeter to measure the resistance between the positive and negative coil terminals. If resistance is 0.84-1.02 ohms, the coil is OK; replace it if the reading is far from this range.
  2. If the power supply, circuits, wiring and coil are in good shape, check the IC unit and pick-up coil as follows:
    1. Turn the ignition OFF.
    2. Remove the distributor cap and ignition rotor.
    3. Using an ohmmeter, measure the resistance between the two terminals of the pick-up coil, where they attach to the IC unit. Measure the resistance by reversing the polarity of the probes. If approximately 400 ohms are indicated, the pick-up coil is OK, but the IC unit is bad and must be replaced.
0900c152800716f1.jpgFig. 10: Connect the ohmmeter to the pick-up coil terminals-1979-83 models 0900c152800716f3.jpgFig. 11: Remove the screws (arrows) to detach the IC unit-1979-83 models
  1. If the resistance is other than 400 ohms, proceed with the following:
    1. Be certain the two pin connector to the IC unit is secure.
    2. Turn the ignition ON.
    3. Measure the voltage at the ignition coil's negative terminal.
    4. Turn the ignition OFF.
WARNINGRemove the tester probe from the coil negative terminal before switching the ignition OFF, to prevent burning out the tester.
    1. If 0 voltage is indicated, the IC unit is bad and must be replaced.
  1. If battery voltage is indicated, remove the IC unit from the distributor, by proceeding as follows:
    1. Disconnect the battery ground (negative) cable.
    2. Remove the distributor cap and ignition rotor.
    3. Disconnect the harness connector from the top of the IC unit.
    4. Remove the two screws securing the IC unit to the distributor.
    5. Disconnect the two pick-up coil wires from the IC unit.
WARNINGPull the connectors free with a pair of needlenose pliers. DO NOT pull on the wires to detach the connectors.
    1. Remove the IC unit.
  1. Measure the resistance between the terminals of the pick-up coil. It should be approximately 400 ohms. If so, the pick-up coil is OK and the IC unit is bad. If the resistance is other than 400 ohms, the pick-up coil is bad and must be replaced.

Posted on Oct 13, 2008

emissionwiz
  • 76132 Answers

SOURCE: 2000 Quest, how do you check the distributor if its faulty?

WHAT ABOUT THE IGNITION MODULE?

Posted on Jul 09, 2009

wracefans24
  • 1985 Answers

SOURCE: I have a 1993 nissan altima 2.4 liter engine. I

if the engine is not missing,and only idling rough,
you might want to check for vacuum leaks in hoses,or dirty injectors

Posted on Nov 21, 2009

  • 191 Answers

SOURCE: 1984 300zx motor started smoking badly. White

sounds like a blown head gasket or if it is all coming from under the hood check all of the cooling system hose connections and look for any coolant leaks especially around where it could get on to the exhaust.If all of it is coming out of the exhaust the check the oil for signs of coolant getting into the oil,the oil will look milky white or a slimy greenish color and have a sweet kind of smell to it and if this is the case you have a blown head gasket and if it over heated it could have a warped or cracked head.sorry

Posted on Jan 02, 2010

  • 6 Answers

SOURCE: Not starting. No spark. Crank angle sensor?

you my also have a selenoid problem,may sit on passenger side fenderwall.

Posted on Mar 13, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Is there a fuel reset button on a 97 saturn sl2?


my fuel my pump was weak. I replaced it with the fuel filter and My fuel was orange with crystals(sugar)?????? I replaced both them and I still have no spark.?????????
What does this have to do with no spark ? When replacing the PCM
Reprogram PCM software and calibrations.

Jun 06, 2017 | Saturn Cars & Trucks

1 Answer

Fuel pressure regulator can it stop your car from starting


fuel lines hook up backwards problem solved...

Dec 31, 2012 | 1990 Chevrolet Corvette

1 Answer

1995 ford contour cranks but won't start, change fuel filter, fuel pump, and spark plugs. Not getting any spark.


Have you ever heard of testing before replacing parts ? Fuel pressure an flow tesing , testing the electrical circuit for the fuel pump , amp draw testing , voltage drop testing etc... Thier are no magical fixes in auto repair . No spark ! check B+ voltage an ground circuits for the ignition system , Ignition System Designs Operation and Testing an SD Premium video

Jun 18, 2017 | 1995 Ford Contour

1 Answer

My 2001 Lincoln Continental has been sitting for over two years, It did start for about a minute but it wont start again. what can I do


BATTERY DEAD MORE LIKELY.CAR BEEN SITTING FOR 2 YEARS GAS IN FUEL TANK WEAK FULL OF WATER, YOU NEED TO REMOVE DRAIN OUT OLD FUEL IN THE FUEL TANK. YOU NEED ADD NEW FUEL IN FUEL TANK,CHANGE FUEL FILTER, IF CAR BEEN SITTING FOR TWO YEARS.I WOULD REMOVE SPARK PLUGS ONE AT A TIME REMOVE EACH SPARK PLUG SQUIRT FEW DROPS OF OIL INTO CYLINDER THEN REINSTALL SPARK PLUG, REASON I SAY TO DO THIS PROCEDURE IT HELP PISTON RINGS SEAL UP ENOUGH TO BUILD UP COMPRESSION SO YOU CAN START THE ENGINE WHERE IT BEEN SITTING TOO LONG.YOU NEED CHANGE ANTIFREEZE AND THERMOSTAT.REPLACE RADIATOR HOSES TO BE ON THE SAFE SIDE,REPLACE AIR FILTER.

Jul 30, 2011 | 2001 Lincoln Continental

1 Answer

After sitting for 24 hours, the car will turn over but will not fire. This problem has happened twice now in the past week. Both times i was able to get it started by using gas line anti freeze and pumping...


Fuel Pump-have it checked out
Replace the fuel filter

Start on the preventative maintainance items

Spark plugs,air filter,clean throttle plates,MAF Sensor

New O2 Sensors,if over 90,000,just front 2,not
after cat sensors

Jan 25, 2011 | 1998 Mercury Sable

1 Answer

02 6 liter Denali sputtered and died while driving on highway. Started once or twice afterward but than died again. Has fuel pressure at fuel rail when pressing schrader valve with key on. Cranks, will...


possibly 4 things 1 bad ignition coil heating up then breaking down,2 clogged fuel filter,3 weak fuel pump,4 bad throttle position sensor or map sensor to check sensors simply put on hand held scanner and look for codes. replace fuel filter replace coil pack along with tune up plugs wires put fuel pressure gauge to see if fuel pump is working properly

Sep 18, 2010 | GMC Denali Cars & Trucks

2 Answers

Need to start a car 1965 mustang that has not been started in 5 years what should i do first. iI have no idea whats wrong with it.


change old oil and filter make sure all spark plug wires are there and look ok take spark plug out and pour little amounts of marvel mystery oil down into cyl. then turn engine over acouple times if it has a oil pressure guage make sure with spark plugs out and engine turning that you have some oil pressure.then take some fuel line and connect it to the fuel pump on the side of the engine you most take off line going to the fuel tank in order to do this then put all but one spark plug back in the put all the wires on then the one plug that you left out check for spark by installing the wire on the plug and setting the plug on something metal on the car (grounded) the turn the engine over and look if the plug is making a spark if so put it all back together. then with that line you put on the fuel pump stick it into a gas can with plenty of fuel then pour a tiny amont into the carb and try to start

Oct 15, 2009 | 1965 Ford Mustang

2 Answers

RATTLES & HESITATES ON ACCELARATION OR SITTING WHEN WARMED


it could be your fuel filter clogged and/or fuel pump getting weak ... does it back fire ?

Oct 28, 2008 | 1998 Toyota Corolla

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

67 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nissan Experts

yadayada
yadayada

Level 3 Expert

76132 Answers

Phil Lovisek
Phil Lovisek

Level 3 Expert

726 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a Nissan Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...