How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Tim's Auto Repair Your Own Question
Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Nissan
Satisfied Customers: 15966
Experience:  Have owned a repair shop for 25 yrs.
Type Your Nissan Question Here...
Tim's Auto Repair is online now
A new question is answered every 9 seconds

86 D21: does not want to idle, runs rough..stall..sputters..throttle

Resolved Question:

86 D21 Z24 electro injection truck does not want to idle, runs rough sometimes, stall coming to a stop sign. At times spits and sputters and need to feather the throttle to get it back home
Submitted: 5 years ago.
Category: Nissan
Expert:  Tim's Auto Repair replied 5 years ago.

tims auto repair :


tims auto repair :

does it not do this all the time?


No, did a week ago in the evening, started and ran just fine the next morning

tims auto repair :

i see

tims auto repair :

you may have a failing tps.[.throttle position sensor ]..this will do this sometimes,,,but,,sense the problem is intermediate,,,,,testing it may not help you

tims auto repair :

Please ACCEPT my answer by clicking the accept button, so I can get credit for my work.i don't receive commission unless you do ..I'm not always going to be giving you good news,so please don't let this stand in the way of you accepting my does not cost you more money.we will still be able to communicate.please understand,i can not see,hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated!if you are not satisfied with my answer,please do not leave bad feed back,i will gladly opt out and let another expert handle the question.if i have sent any diagrams,please print them.they will only stay on here for an hour or so...sometimes you may need to right click the image,then save picture as]to save it to your computer so you can open it with your picture program...PLEASE ASK IF YOU NEED MORE HELP..............

1986 Nissan-Datsun Truck D21 Hardbody 4WD L4-2389cc 2.4L SOHC (Z24i)
Throttle Position Sensor Locations, Components

Full Size Image

Fig. 40 Electro Injection Unit Parts Location
Tim's Auto Repair and 2 other Nissan Specialists are ready to help you