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Old 12-14-2020, 12:33 AM   #1
vaysr
 
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Default 91 KA24E not running, cranks no start

So I own a 91 D21 wirh the KA24E. I just replaced the motor and put a new timing chain, water pump, spark plugs. I got it running, but it shut off on me after my 3rd time driving it. So far i have replaced the coil, MAF senor. It will crank, but not start. I pulled the exhaust to check the catalytic convertor, it was clear. No codes but. I had disconnected the battery. I got an ecm on its way, so hopefully i will get a code when i try to start it. Need suggestions.
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Old 12-14-2020, 03:09 AM   #2
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Is the timing correct?

Is the distributor good?

Spark plug wires tested for good continuity?

Plug wires on the correct spark plug for proper firing?

Do you hear the fuel pump turn on when you turn the key to accessory?

What is the fuel pressure at?

All Ground connections clean and tightened down?
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Old 12-14-2020, 03:53 AM   #3
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Air, fuel, compression, spark.


Will it fire, briefly, with some starting fluid?
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Old 12-14-2020, 03:52 PM   #4
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Spray some aerosol starting fluid into the air cleaner or carb, try to start, do this a few times. If it runs for a few seconds then quits out, you have a fuel delivery issue, start there. If it won't run at all when you do this, then it's a spark issue, work on that. This is a common first test to help isolate the problem. This is practically an ALWAYS: isolate whether spark or fuel. And remember: just because the engine can crank fine, doesn't mean that the electrical part of the ignition switch (the "run" circuit) is OK.
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Old 12-15-2020, 02:12 AM   #5
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Tried starting fluid. Fuel pump is good. Ignition circuit is good, replaced a year ago. Fuel pump replaced two years ago. Its pressurizing the system. Pulled fuel line from filter to prove its good. I think distributor(crank position senso) is bad or ignition control module.
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Old 12-15-2020, 04:11 AM   #6
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So ... what happened when you tried the starting fluid?


Assuming no brief run, next I'd try an in-line spark tester. And then a compression test if there is spark.
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Old 12-15-2020, 11:09 PM   #7
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Quote:
Originally Posted by vaysr View Post
So I own a 91 I got it running, but it shut off on me after my 3rd time driving it.
Can you give more details on "when it shut off"? Details, give details.
- Slow die? ...like starving.
- Or, just didn't want to start, when you tried?
- Or, came to a light and it died? What???


Check all of what was suggested above?
Check the timing? If you jumped a tooth on the timing chain........
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Old 03-15-2021, 05:13 PM   #8
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I helped the guy out on this and the worm gear on the crank that drives the oil pump and distributor was jacked up and caused it to jump timing for the distributor. He is in process of replacing the part
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Old 03-15-2021, 07:55 PM   #9
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Great, thanks for letting us know Brian.
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Quote:
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What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 03-15-2021, 11:27 PM   #10
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I've never had one of those fail. Do you think it, the oil pump, or the distributor were installed incorrectly? Or that gear damaged by forcing/hammering the pump in? Or ...?
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1990 Nissan Hardbody, Aztec Red
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Intentionally near-stock
Mods: Second OEM horn, stereo/speakers/sub,
mud and snow tires, HD trailer hitch (cat 3+),
liquid bed liner, G1W dashcam
Definitely not for sale!
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