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Old 10-20-2020, 07:09 PM   #1
AB3K
 
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Default 1987 Nissan D21 Engine keeps dying

Hello,

I've been trying to find some information that could help my situation.

a little info on the truck, it's a 1987 (or 86.5?) d21 z24 engine, 5 speed, 2wd, I had to replace the EGR because It would not start with the broken one it had. after replacing the EGR, which i had to cut the exhaust in order to accomplish due to bolts being rusted in place, and welding the whole exhaust back together, now my truck starts but dies after about 5 seconds, If I apply some gas, it stays running. but the moment i let off the gas pedal, it sputters to a stop.

Im not very mechanical at all, im sort of learning as I go along. I sent a message to the Local Losers on instagram, and i'm being told it could be my idle air control valve, and I just need to adjust a screw on the throttle body.

Problem is, im not able to find any documentation on where or what screw specifically i'd need to adjust.

Please help me

if I need to add anymore info just let me know what else is needed to fix this problem. keep in mind im not too mechanically inclined, i hope this is the right place to ask.

Thanks,
Andrew
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Old 10-20-2020, 07:19 PM   #2
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Don't fiddle with anything!



Pull codes. Make sure you have spark, air and fuel.
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Old 10-20-2020, 07:40 PM   #3
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Quote:
Originally Posted by Deerhurst View Post
Don't fiddle with anything!



Pull codes. Make sure you have spark, air and fuel.
okay, i gotta learn how to do that first. but when i figure it out i'll post what it says



EDIT: so i found a video on how to run the ecu in diagnostics. but it just keeps blinking red and green at the same time. Is my ECU defective?

Last edited by AB3K; 10-20-2020 at 08:11 PM.
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Old 10-20-2020, 08:28 PM   #4
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https://m.youtube.com/watch?v=6l7SwU7ZuVk

See video by JP2code.

I think you need to select your diagnostic mode and it’s just cycling through the modes until you select one
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Old 10-20-2020, 08:36 PM   #5
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Just a thought: When you replaced the EGR, did you remove the throttle cable? If so, it may need to be snugged up a bit. There are two nuts on the cable which can be adjusted to increase/decrease the throttle. I just put my engine back together after a rebuild and I had my throttle cable too tight - which gave me a high idle. When I reduced the cable tension down to nothing, it behaved similarly to yours - where it sputtered and eventually died. After tweaking the cable adjustments, I have it idling at about 800rpm now.
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Old 10-20-2020, 09:17 PM   #6
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Quote:
Originally Posted by rbourgeo View Post
https://m.youtube.com/watch?v=6l7SwU7ZuVk

See video by JP2code.

I think you need to select your diagnostic mode and it’s just cycling through the modes until you select one
My ECU doesn't have a turn dial like that in the video. It only has an on/off switch on the rear facing side of ECU, and the LED viewport on the top.




Quote:
Originally Posted by MidnightOil View Post
Just a thought: When you replaced the EGR, did you remove the throttle cable? If so, it may need to be snugged up a bit. There are two nuts on the cable which can be adjusted to increase/decrease the throttle. I just put my engine back together after a rebuild and I had my throttle cable too tight - which gave me a high idle. When I reduced the cable tension down to nothing, it behaved similarly to yours - where it sputtered and eventually died. After tweaking the cable adjustments, I have it idling at about 800rpm now.
I thought that might be it too, and i tried both loosening and tightening it up, and it has the same issue. I even tried to adjust the little screw at the bottom of the piece the throttle cable loops around, and it just high Idle'd til it eventually sputtered out still.


im going to get some photos so hopefully it'll be a little more help
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Old 10-20-2020, 09:32 PM   #7
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Last edited by AB3K; 10-20-2020 at 09:36 PM. Reason: photo links fixed sorry for double post
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Old 10-20-2020, 09:33 PM   #8
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https://imgur.com/RQXnI1s
https://imgur.com/FCAPWKA
https://imgur.com/UWePa6Y
https://imgur.com/CMOBJql
https://imgur.com/3tIWZcR
https://imgur.com/IvO6yol
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Old 10-20-2020, 10:51 PM   #9
cadillacdude1975
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When both lights flash three times together, flip the switch to on before it blinks four times. That should put it in diagnostic mode. Then it will alternate the red and green lights. 3 red flashes and 6 green flashes is a code 36 for example.
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Old 10-20-2020, 10:59 PM   #10
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Quote:
Originally Posted by cadillacdude1975 View Post
When both lights flash three times together, flip the switch to on before it blinks four times. That should put it in diagnostic mode. Then it will alternate the red and green lights. 3 red flashes and 6 green flashes is a code 36 for example.
that seemed to work, it went to single LED flashes, it kept repeating 4 green then 4 red.
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