Noobie's 510 project

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DADZSUN
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Posts: 351
Joined: 08 Aug 2011 18:35
Location: Ottawa, ON

Spring (?) update

Post by DADZSUN » 19 Apr 2018 05:32

It's been awhile since my last update. Despite being crazy busy with work/life, I haven't stopped chipping away, just nothing exciting to show.

The R180 diff and Acura Integra wiper motor is installed and all electrical is complete right up to the firewall. Pretty much all of my time is in the engine bay, first shortening all the wires, and now troubleshooting ECU codes.
InjectorHarnessShortening.jpg
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Although the ECU is getting on 30 years old now, it's still quite capable of sharing any codes that arise - left lamp blinks denote orders of 10, right lamp 1's. Two blinks of red and one of green means #21.
ECULamps.jpg
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I first had error code #11 - no signal from Crank Angle Sensor - which ultimately meant I improperly wired a small part of the CANAM box. Once complete I'll share my exact setup.
NoVoltagetoCAS.jpg
NoVoltagetoCAS.jpg (107.97 KiB) Viewed 235 times
Now code #21 has popped up, no signal from the external coil. I need to purchase a Logic Probe to step through.
TroubleShootingCode21.jpg
TroubleShootingCode21.jpg (98.26 KiB) Viewed 235 times
Thankfully the Factory Service Manual (FSM) is pretty good & thorough at helping to troubleshoot. It's just a matter of being patient and stepping through.
FSMDiagnosticProcedures.jpg
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Everything else seems to be working well, the new fuel pump primes, motor turns, LEDs on the CANAM are operating as they should.
'72 Datsun 510 - Orange w/Watanabes & KA24E
'76 Datsun 280z - Current rebuild project

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DADZSUN
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Posts: 351
Joined: 08 Aug 2011 18:35
Location: Ottawa, ON

Here she continues to sit...

Post by DADZSUN » 07 May 2018 05:18

I'm a little bit baffled right now.

ECU codes are clear (showing 55), I've got spark, and fuel (both in the chamber and logic probe off the injector clips)... yet I'm unable to get her started.

I've tried swapping the timing 180 degree, both by rotating the wires off the cap and pulling & rotating the distributor.

The plugs are quite dark & wet and when I turn the engine w/o plugs a visible mist of gas is fired out (injector clips are pulled).

I'm suspecting it's the Fuel Pressure Regulator and have ordered a new one. The only other idea is that my new injectors are the eBay 4-hole aftermarket Stanza KA24e versions - supposedly compatible with the 240sx... Is it possible for an engine to not fire due to excessive fuel???

Fuel lines could be reversed but I am definitely getting fuel - and I don't think fuel can be forced backwards even through a faulty FPR.

Any other suggestions?
May_18_Update.jpg
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'72 Datsun 510 - Orange w/Watanabes & KA24E
'76 Datsun 280z - Current rebuild project

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bertvorgon
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Joined: 04 Aug 2003 20:45
Location: White Rock, B.C. Canada

Re: Noobie's 510 project

Post by bertvorgon » 07 May 2018 09:43

PM sent
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1968 Vintage 3HP Mini Bike
1971 Vintage 13' BOLER trailer

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duke
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Joined: 26 Oct 2005 14:21
Location: Santa Rosa, CA

Re: Here she continues to sit...

Post by duke » 09 May 2018 19:59

DADZSUN wrote:
07 May 2018 05:18

Any other suggestions?
Carburetors...

(Sorry, I had to.)
Duke Schimmer

'72 2-Door 510
"Simplify and add lightness."

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DADZSUN
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Joined: 08 Aug 2011 18:35
Location: Ottawa, ON

Re: Noobie's 510 project

Post by DADZSUN » 10 May 2018 08:33

Lol, really eh?
'72 Datsun 510 - Orange w/Watanabes & KA24E
'76 Datsun 280z - Current rebuild project

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