Question about 1989 Nissan Sentra 4 Door

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My brand new spark plugs have black soot covering them, car wont fire. have replaced spark plugs cap and rotor and cables... what could be the problem?

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What year is your car? Type, model........

Posted on Oct 19, 2013

Testimonial: "1989 Nissan Sentra sedan. I figured out that my firing order was off. fixed that... 1342... now I am concerned because my 1 cylinder seems to always be the culprit to any new problem. I am the third owner(the second was my mom)and before she owned it it had over heated at least once. How do I anticipate problems that may arise from this. and is it part of why my spark plugs were covered with black soot"


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Posted on Jan 02, 2017

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SOURCE: 1998 nissan sentra wont start

have you checked the timing belt?

Posted on Feb 17, 2009

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SOURCE: Car will turn over but won't start

it sounds like you have a weak spark. take the spark plug that fires good and put it on each of the other three wires, if it still fires good then the problem is your not coming through them. if no change then swap the wire and plug that fire good together onto another position on the cap, if it fires good in another position then its the wires. if it still doesn't change and the cap and rotor are new, i'd look at the coil.

Posted on Mar 13, 2009

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SOURCE: car won't start

Stang: Nissan had a TSB on weak spark related to the Altima's and Sentra's. It had to do with water getting trapped in the spark plug tubes due to the steam hole vents in the plug wires becoming clogged and/on the wires no longer sealing well to the motor, thus allowing water to accumulate into the plug holes. This would cause a weak spark condition. You would still get an injector pulse as long as the ignition can be triggered.
As far as fuses: There is a box on the driver's side which contains fusible links and fuses. Unless you are checking for power with the ignition on, most of the circuits will be dead because they are switched circuits through the ignition switch. The headlights will be hot without the key on, as will the running lights,horn and brake lights.
However due to the fact that you have light spark and have injector pulse, would tell me that you have power to the ECM. If you want to check circuits, buy a cheap test light and follow the instructions. it is a simple diagnostic tool for checking for open circuits.
Hopeful I might have given you some direction. Good luck.
PS: if you replace plug wires, do so with a good quality wire. I have found that NGK wires and the Original equipment wires seem to be the best quality, lasting the longest. Life time warranty parts mean nothing if they fail at inconvenient times and with frequency. Many of these warranty's are gambles made by parts houses based on the fact that people loose their information, don't keep the cars and or just forgot they had the warranty and went out and replaced the parts again.

Posted on Apr 05, 2009

  • 76630 Answers

SOURCE: Hello! I have problem with erratic

Is the EGR valve leaking, to check this feel the EGR valve at idle, it should not be hot, if it is the valve is leaking and should be replaced, the second common cause is intake manifold vacuum leaks, u can check this with a can of spray carburetor cleaner, if there is a leak the idle will change as u spray the area of the intake that has the leak, also look for split or loose vacuum hoses, then there is the fuel injectors, u could have one or more that are not spraying correctly from carbon or sludge on the injector tip, the dealer can run an injector flow test to determine if that is a problem, last is low cylinder compression or ignition problems, all cylinders should be within 5% of the highest reading, more than 5% and a rough "ratty" idle is the result. I am a tech of 35 years and this is the order i go in to find these types of problems.

Posted on May 02, 2009

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SOURCE: Distributor wont spark

check the fuseble link.
you can measure it, and make sure the contact are clean and secured.
the other thing is the check the ignition switch, make sure you have 12v going to the switch.
check thermo switch on top of the block.

Posted on May 21, 2009

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you didnt do sparks 1 by one, and mangled the firing order.

bad boy,

or set the spark gap wrong, or used china junk rotors, that index 3 ways, or all the above.

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I always heard the only gap was the spark plug gap-the rotor has no gap-are you sure you got the correct rotor? And does it touch the top distributor cap coil wire tower?

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My 94 gmc safari van wont crank until i clean the soot off the plugs then runs 10 minutes dies wont crank until i clean soot off plugs it wont stay running whats wrong?

just a guess but check if you have the right spark plugs for you van. spark plugs have a heat range. the right plugs for your van are AC R 43TS If you have a V6 engine. Also check your plug wires or just replace them. I would also check distributor cap and rotor. these parts are inexpensive, I would just replace them and see if that fixes the problem. if you did this already I don't know what to tell you know I will research my owners manual if I find something else I will pass info to you.

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the black soot may be old plug wires that should be replaced chances are the spilled oil caused the engine to miss fire setting off the check engine check the inside of the plug boots and plugs for oil.

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You are getting good spark to the plugs? Have to assume you retimed it after you changed the rotor and cap. Wires are good?

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