Everything posted by Mark Maras
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Still struggling with car at idle after 8 years
What about oil usage? Miles per quart or how often do you top it up?
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Still struggling with car at idle after 8 years
The numbers look OK. Lets try heading down another path momentarily. Something I don't remember discussing in the past is oil usage. How many miles do you drive before it needs a quart of oil and are there any oil leaks?
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Still struggling with car at idle after 8 years
I don't like to compression test a hot engine because I don't like to remove spark plugs from a hot engine. However if the plugs come out easily it's better to test the engine when it's warm.
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Still struggling with car at idle after 8 years
Remove the coil wire, remove the spark plug wires and spark plugs, get comfortable in the seat and turn the engine over (wide open throttle) with the starter until you see oil pressure on the gauge. It shouldn't take long. Then proceed with the test.
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Still struggling with car at idle after 8 years
That should work just fine. Good luck and I said earlier, build some oil pressure with the starter, plugs out, first.
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Still struggling with car at idle after 8 years
But first recheck the compression with the throttle wide open.
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Still struggling with car at idle after 8 years
The only thing I can add is I remove the plugs and turn the engine over until I see oil pressure, then test. When I didn't start with oil pressure #1 would read low the first time and higher on the second test. Good luck.
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Z's on BAT and other places collection
To each his own, I guess. It reminds me of the Excalibur from the sixties.
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1971 HLS30-14938 "Lily" build
Gas pedal? The best one for heel and toeing.
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Still struggling with car at idle after 8 years
Do you know if he held the throttle wide open during the tests?
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Still struggling with car at idle after 8 years
@jalexquijano This info may add another piece to the puzzle.
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Still struggling with car at idle after 8 years
I'd like to see the results from another compression test. I'm beginning to think it may be a bad oil ring as suggested by Zed Head.
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2023 What I did today.
Keep the stereo, get rid of the car.
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Z Cars On TV And In Movies
in the Portland area we have an ON Point Credit Union ad on tv that has a beautiful blue 280. It only shows the hood and windshield but it's unmistakable.
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Still struggling with car at idle after 8 years
Is the black crud on #4 dry or oily and does it smell like fuel when you remove it?
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Still struggling with car at idle after 8 years
@jalexquijano. I remember discussing changing the valve seals several times. Did they ever get replaced?
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Phantom Z designed by Mr. Matsuo Will be reveiled at Z Con 2014!
Kinda reminds me of the E Type hearse in the movie Harold and Maude.
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Still struggling with car at idle after 8 years
But, as I recall, the compression was good on all cylinders. Correct me if I'm wrong @jalexquijano.
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Not quite overheating
I understand the logic in having the fan clutch heat actuated BUT I think it would have been an improvement to have the fan clutch only actuated when the vehicle slowed below 10 mph.. As Zed Head stated "The fan only matters at low (or no) vehicle speed.
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77 280z Restoration
I actually had two old Chevys back in the day. A 39 long bed pick-up and a 49 deluxe coupe. As I recall the 49 had a push button starter and the 39 had a starter pedal that you stepped on to mimic a starter solenoid.
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77 280z Restoration
Our daughter just got a new Nissan. She showed me all the bells and whistles it had which included "push button start". The look on her face, when I told her my 49 Chevy had push button start was priceless.
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Not quite overheating
As I understand it, 14.7:1 is the ideal ratio but everything I've seen and heard says a gas engine runs much stronger and COOLER with the mixture somewhere in the 12.5:1 to 13.2:1 area.
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Bypassing ballast resistor?
This part of the mystery seems like a bad ignition switch.
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low oil pressure
When you say larger oil pan, do you mean wider or deeper?
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Carb Part needed 72 roundtop
When you install the new nozzles be sure the attachment points on the choke linkage (flat bar with bent ends) are exactly parallel with their mounting points. The linkage piece frequently needs a bit of a twist on one end or the other to re-align it. Misalignment will cause the nozzles to stay down in the choke position.