Author Topic: 1983 Datsun 280ZX  (Read 144588 times)

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Offline BattleHymn

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Re: 1983 Datsun 280ZX
« Reply #425 on: October 31, 2010, 11:00:17 PM »
That's next on my list.  I grabbed an EFI supplement to the factory service manual that Datsun uses.  I'll just have to take my time and run down each test one at a time.  My fuel pump is pretty loud, though, so I may check it first.

I'm planning ahead for the cold weather this year.



I have a pair of those.  They work.  Make sure your feet stay warm, too. 

When we go skeet shooting and target shooting in the winter (we've went when it is as cold as 2 degrees F before), I wear my coveralls, and my pair of Redwing work boots.  My trigger finger gives out long before I even notice the cold.

Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #426 on: November 09, 2010, 07:26:41 PM »
My radiator is leaking. :mad:

It's not the original core.  Looks like someone welded this thing in their garage.
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Offline true_blood

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Re: 1983 Datsun 280ZX
« Reply #427 on: November 09, 2010, 07:45:59 PM »
One thing after another, huh Chris?
That's cars for ya. :banghead:

Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #428 on: November 09, 2010, 08:10:55 PM »
I knew it was leaking when I bought it. I just didn't know from where.  Good thing it's a slow leak but buying coolant is getting expensive.

Going to unplug the MAF tomorrow to see if it fixes my hot idle/start problem.  Nothing's worked yet.
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Offline true_blood

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Re: 1983 Datsun 280ZX
« Reply #429 on: November 09, 2010, 08:27:21 PM »
Good luck man!

Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #430 on: November 10, 2010, 03:16:06 PM »
This shade of red looks good on a Ferarri.

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Offline cavegal

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Re: 1983 Datsun 280ZX
« Reply #431 on: November 10, 2010, 03:21:57 PM »
This shade of red looks good on a Ferarri.


On that model Ferrari, primer would look good on it!


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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #432 on: November 10, 2010, 03:22:48 PM »
I'm trying to decide if I want to keep the same general color or switch to something else entirely. :-)
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Offline Odin's Hand

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Re: 1983 Datsun 280ZX
« Reply #433 on: November 10, 2010, 03:28:26 PM »
I'm trying to decide if I want to keep the same general color or switch to something else entirely. :-)

Black under clear coat.
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Offline cavegal

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Re: 1983 Datsun 280ZX
« Reply #434 on: November 10, 2010, 03:32:03 PM »
I'm trying to decide if I want to keep the same general color or switch to something else entirely. :-)
The original is that yellow with black stripe, that seemed nice.. the burgundy is nice though.   


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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #435 on: November 10, 2010, 03:34:27 PM »
I'm thinking yellow.  I might even get the racing stripes.

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Offline cavegal

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Re: 1983 Datsun 280ZX
« Reply #436 on: November 10, 2010, 05:19:09 PM »
I'm thinking yellow.  I might even get the racing stripes.


I like that myself.. better than the Burgundy .


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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #437 on: November 10, 2010, 05:56:12 PM »
le sigh...

Disconnected the MAF sensor... no change (it actually made it worse.  I think this is supposed to be normal).  Ran the motor @ 3,000 rpm and disconnected the electrical connection going to each injector one at a time.  #2-5 caused the engine to stumble until it was reconnected, which is normal.  #1 and #6 produced no change in the performance of the engine.  They are either not getting a signal or they are not getting fuel, or that cylinder is not getting a spark (left my wire tester at home -- I did this at WalMart).  Also, taking off the oil filler cap causes the engine to stumble and die as well (I think it's supposed to do this).

None of this explains why it only acts this way while the engine is warm.
« Last Edit: November 10, 2010, 06:00:46 PM by chris_ »
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Offline Thor

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Re: 1983 Datsun 280ZX
« Reply #438 on: November 10, 2010, 06:00:40 PM »
le sigh...
Also, taking off the oil filler cap causes the engine to stumble and die as well (I think this is supposed to be normal).

I don't think that's "normal". Usually, the oil is a sump type system. Opening the cap shouldn't change anything. Have you checked the compression, too??

IF deleting # 1 & 6 didn't change anything, I'd change out or clean those injectors.  I'm still leaning towards a vacuum leak someplace.
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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #439 on: November 10, 2010, 06:04:31 PM »
Haven't done a compression test yet.  I forgot to do that.

Everything I've read says that removing the oil filler cap will cause the engine to stumble because it reduced crankcase vacuum and some other yadda yadda.
« Last Edit: November 10, 2010, 06:08:13 PM by chris_ »
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Offline Thor

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Re: 1983 Datsun 280ZX
« Reply #440 on: November 10, 2010, 06:08:21 PM »
Everything I've read says that removing the oil filler cap will cause the engine to stumble because it reduced crankcase vacuum and some other yadda yadda.

Can't argue with that, just doesn't make sense The crankcase is not normally "pressurized". (positively or negatively) However, it IS a Jap car......  :fuelfire:
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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #441 on: November 10, 2010, 06:10:46 PM »
I swear I've replaced every single vacuum hose on this engine.  If there's a leak somewhere, I have no clue unless there's a hole in the MAF bellows.
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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #442 on: November 10, 2010, 06:27:53 PM »
My wire tester says all my plugs are getting a spark.
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Offline Thor

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Re: 1983 Datsun 280ZX
« Reply #443 on: November 10, 2010, 07:01:37 PM »
Is this an automatic or stick??
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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #444 on: November 10, 2010, 07:05:53 PM »
This one is an automatic.
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Offline true_blood

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Re: 1983 Datsun 280ZX
« Reply #445 on: November 10, 2010, 07:23:36 PM »
Does your car look similar to the one you posted? If so, I say go for the yellow and black racing stripe. (No side stripe, it'll make the car look cleaner in my opinion.)
The car still stalls when warm/hot?

Offline Thor

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Re: 1983 Datsun 280ZX
« Reply #446 on: November 10, 2010, 08:17:18 PM »
This one is an automatic.

Is there a modulator vacuum line? If so, was it replaced?
"The state must declare the child to be the most precious treasure of the people. As long as the government is perceived as working for the benefit of the children, the people will happily endure almost any curtailment of liberty and almost any deprivation."- IBID

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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #447 on: November 10, 2010, 08:18:05 PM »
Don't know... what is that?
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Offline Chris_

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Re: 1983 Datsun 280ZX
« Reply #448 on: November 10, 2010, 08:29:08 PM »
Here is the entire vacuum system
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Offline Thor

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Re: 1983 Datsun 280ZX
« Reply #449 on: November 10, 2010, 09:13:40 PM »
That looks a LOT like how my 310 GX engine  was set up.  Let me think on this for a bit.
"The state must declare the child to be the most precious treasure of the people. As long as the government is perceived as working for the benefit of the children, the people will happily endure almost any curtailment of liberty and almost any deprivation."- IBID

I AM your General Ne'er Do Well, Troublemaker & All Around Meanie!!

"Congress has not unlimited powers to provide for the general welfare, but only those specifically enumerated."-Thomas Jefferson