Nissan

Nissan repair questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

86 Nissan d21 3.0 won't start have fuel pressure spark but…

Customer Question
86 Nissan d21 3.0...

86 Nissan d21 3.0 won't start have fuel pressure spark but injectors are not spraying fuel can put gas down throttle body and fires right up. Hooked noid light up nothing I have 12 votls

Mechanic's Assistant: How many miles are on the vehicle? And when was it last serviced?

143000 new engine new plugs wires and fuel filter

Mechanic's Assistant: What is the model of your '86 Nissan?

Nissan pickup

Mechanic's Assistant: Are you fixing your Pickup yourself? What have you tried so far?

Yes I've checked fuel pressure spark ohmed injectors checked votage to injectors.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Not that I can think of

Submitted: 7 months ago.Category: Nissan
Show More
Show Less
Ask Your Own Nissan Question
Answered in 2 hours by:
11/21/2017
Nissan Mechanic: Jim, ASE Certified Technician replied 7 months ago
Jim
Jim, ASE Certified Technician
Category: Nissan
Satisfied Customers: 1,519
Experience: California smog licensed, ASE ceritied in L1, A6, A8 for over 30 years professionally
Verified

The computer turns the injectors on and off, the following test will need to be done to isolate the problem.

If there is a problem in the circuit it is recommanded to replace all the injectors and computer at the same time.

At the distributor, check a good 5 volt square wave signal on the Green/Yellow and Green/Black wires.

Check the injector resistance. Normal resistance is 1.5 ohms.
At the computer check to see if the injectors can be operated by tapping the injector control wires quickly to ground. Do not hold the wires to ground for any period of time. A quick tap only.
Check the tachometer signal to the computer at pin 3 during crank.
Check the power and ground supply to the computer.

Ask Your Own Nissan Question
Customer reply replied 7 months ago
Do you know the connector pin and wire color going to computer for the ground?
Nissan Mechanic: Jim, ASE Certified Technician replied 7 months ago

Give me a few to find.

Ask Your Own Nissan Question
Customer reply replied 7 months ago
not sure if im over looking but i do not see the injector circuit on that diagram
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a nissan mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Jim Your Own Question
Jim
Jim
Jim, ASE Certified Technician
Category: Nissan
Satisfied Customers: 1,519
1,519 Satisfied Customers
Experience: California smog licensed, ASE ceritied in L1, A6, A8 for over 30 years professionally

Jim is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was in trouble with an electrical issue with my brand new Nissan. I frantically went online trying to find help and luckily I found your site. I reached a NISSAN tech named RIP. He was absolutely tremendous and helped me work through the issue. What a pro!

cjazLexington, KY

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

< Previous | Next >

Meet the Experts:

Chris(aka-Moose)

Chris(aka-Moose)

Nissan Technician

747 satisfied customers

16 years of experience

Tim Mohr

Tim Mohr

ASE MASTER TECH

602 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Marty

Marty

ASE Certified Technician

161 satisfied customers

ASE & Bosch master tech. 30 years experience.

Mike V.

Mike V.

Nissan Technician

9,482 satisfied customers

Nissan factory trained and Certified Subaru Technician.

Ron

Ron

ASE Certified Technician

589 satisfied customers

34 years of automotive Repair

Anthony

Anthony

ASE Certified Technician

332 satisfied customers

ASE Master Automobile Technician with over 18 years exp. in this field.

Richard

Richard

ASE Certified Technician

92 satisfied customers

Nissan Tech ASE certified technician

< Previous | Next >

Related Nissan Questions
I've got a '94 Nissan Pickup (D21), with a new battery, that
I've got a '94 Nissan Pickup (D21), with a new battery, that won't start half the time until I do one of two things; 1) roll start it (if I'm on a hill) or 2) spray Starting Fluid into the carburator.… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
589 satisfied customers
My 1997 Nissan Se pickup 2.4L cranks but won't start. I have
My 1997 Nissan Se pickup 2.4L cranks but won't start. I have good spark and even when I spray starting fluid it doesn't even try to start. Is this most likely a fuel injector power problem?… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Nissan Truck: I have a 93 Nissan truck that isnt running on
I have a 93 Nissan truck that isn't running on 1 and 2 cylinders. The cylinders are receiving fire, fuel, and compression on the 2 cylinders are within 5 psi of 3 and 4. I've tried replacing the injec… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
589 satisfied customers
Nissan Sentra: Ok, so I have a 2004 Nissan Sentra and I am
Ok, so I have a 2004 Nissan Sentra and I am having starting issues, Basically it won't start. I have replaced the Cam positioning sensor, Crankshaft position sensor, spark plugs, Temp sensor, Fuel Inj… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
I am trying to get the electrical diagram for a 1986 d-21 nissan
I am trying to get the electrical diagram for a 1986 d-21 nissan 4x4 hardbody.Having ignition problems, no fire.I have tryed to go through the system and keep getting hung up.The truck is a v-6 and hy… read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
I have a 1989 Nissan D21 pickup, 4wd, 3.0 V6. The idle RPM
I have a 1989 Nissan D21 pickup, 4wd, 3.0 V6. The idle RPM varies up and down about 200 RPM and we can't find the problem .Any suggestion?… read more
coreyskyline
coreyskyline
8 satisfied customers
Nissan/Datsun D21 Pickup SE: I have 1990 Nissan d21 truck.
I have 1990 Nissan d21 truck. It won't start. I turn the key the engine tries to turn over, but it doesn't start. Fuel pump kicks on and I have spark. It just won't turn over… read more
rpmdiag
rpmdiag
High school
7,747 satisfied customers
Nissan D21 Pickup: I have an 86 Nissan D21 Pickup I have done
I have an 86 Nissan D21 Pickup I have done a tune up change the spark plugs and wires change the fuel filter and added sefoam to the truck. But when I tried to start the truck It will crank but wont t… read more
tim37857
tim37857
Mechanic
High School or GED
71 satisfied customers
89 pathfinder: wont start..cap, rotor and coil..fuel pressure
89 pathfinder won't start. Has all new plugs, cap, rotor and coil with good spark. Has spec fuel pressure. Will start and run with gas poured into the throttle body. Checked FPR, works fine. Defeated … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
1992 nissan stanza: 2.4L..wont start..injector..only 12 volt..crank
i have a 1992 nissan stanza 2.4L i just replaced the engine in it i put back in the same 2.4L engine same year an everything when i tried to start it it rollsbut wont start i checked the injector wire… read more
Mike V.
Mike V.
Nissan Technician
Subaru and Nissan factory training.
9,482 satisfied customers
6 D21: SE..V..fuel to get to the carb..relays click as i turn the key.
I have a 1987 SE Nissan 3.0 L V-6 D21 king cab 4x4 pickup. Somthing is preventing fuel to get to the carb. I can here the relays click as i turn the key. do not here the pump. pulled the pump & replac… read more
normanahoyt
normanahoyt
Owner/technician/manager
Bachelor's Degree
367 satisfied customers
1990 Nissan Stanza: bog down..fuel pump..fuel filter and gas
1990 Nissan Stanza, enginge will turn over but not start. Before this problem, over the last week, when I would hit the Gas the car would bog down before excelerating. I checked the fuel pump, and fue… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
1988 D21 pickup: running on two cylinders, it is a Z24 can you help me
I have a 1988 D21 pickup and it sounds like it is running on two cylinders, it is a Z24 can you help me please… read more
Matt Carey
Matt Carey
asst. manager/ lead technician
High School or GED
225 satisfied customers
1995 nissan sentra: replace rotor cap and rotor fuel filter.
my 1995 nissan sentra want start. I have replace rotor cap and rotor fuel filter. car turn over but want start. when this first happen the car started and cut right back off. I do not see anything els… read more
Mike V.
Mike V.
Nissan Technician
Subaru and Nissan factory training.
9,482 satisfied customers
1994 nissan: 4wd..water pump..leaking..timing chain
I have a 1994 Nissan 2.4L 4wd pickup, about 250 yards past where the heater usually kicks on it went dead. The shop changed out the water pump (the pump was leaking but the truck didn't run hot). The … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
1987 Nissan pickup: running great..a pulse on the fuel injectors..V6
1987 Nissan pickup. Was running great, now not getting a pulse on the fuel injectors. Has a V6 in it. How do you tell if its the computer gone bad, or a broken ground wire. If its a broken ground wire… read more
Clayso
Clayso
Lead Technician
ASE Master Technician 1999
274 satisfied customers
Sentra: the distributor and cap,alternator,spark plugs and wires..coil
I have a 90nissan sentra automatic the car wont start ,but if i spray starting fuild it will but when the vapors are gone it dies .It seems as if something is not commuicating. I've replaced the distr… read more
Infiniti Nissan Specialist
Infiniti Nissan Specialist
Master Technician
Vocational, Technical or Trade Scho
915 satisfied customers
86 d21 pickup: with v6..evening and wont start..injector..cranking
I have a 86 d21 pickup with v6, I went to work this morning and shut truck off was fine came back in the evening and won't start. I checked for fire at the coil and again at the plugs, it is good. And… read more
RIP
RIP
Lead Technician/ JA Car Category Mentor
High School or GED
452 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x