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Perplexed

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Our reassembled 260z engine was finally started and pegged at 1400 rpm. Got her down to 1000 and she sputtered and quit. Now she is

starved for fuel. I pulled the line going into the mechanical pump and

it was bone dry. I had to call a time out because it was getting to me.

One other thing the vacuum at 1400 was 15 inches and steady so I

must be close. Someone tell me where is #1 located on the cap for

proper firing order? Are there pictures on the web that show it?

  • Author

I took my air hose and shot some into the fuel line back to the tank and also going to the carbs. Think my starter windings are heating up so I will get another but for now the battery is getting recharged. I will post some pics later of the crank, distributor and rotor and wire positioning.

  • Author

With a fully charged battery it looks like all we need is fuel. There is gas in the tank but not much so with a small can and some hose hooked directly to the mechanical pump we will try to start her. If that works I go to the tank and pull the lines and blow them out.

So much for Friday the 13th

You can operate the fuel pump by hand if you remove the valve cover, pull the lever several times to prime the system. That will keep the starter from spinning so much.

Bonzi Lon

S
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  • Author

I pulled the pump and valve cover just to make certain that the eccentric was not loose. I remounted the pump flush with a new gasket without a spacer. There is 4 gallons in the

tank but nothing at the pump. With a charged battery she cranks strong and on starting

fluid no bacfire and clean at the tailpipe. For now once she gets running I just want to be

sure there are no leaks and she holds a steady idle and vacuum. I will try posting some pics today but she ain't pretty outside.

  • Author

OK I have some pics on an SD card so how do I get them posted you you can see our speckled trout? I am new at this

  • Author

I primed the pump she fired right up and held 20 inches of steady vacuum at 1000 rpm and ran until she reached midpoint on the temp gauge. I still have to sort out a fuel issue because she starts dropping rpm. There were no visible leaks and she idled smooth with a clean exhaust. We did not try accelerating because we wanted her to maintain idle first.

We will load photos and video later on Photobucket. We are closer

  • Author

Well if I prime the mechanical pump she fires right up and runs off the gas can smoothly.

She is up on ramps so I shall pull the pump and hoses off the rear and blow everything

out. So with gas in the front I can reconnect the lines and since she is at 800 rpm the

rear pump will be on and we will see what happens. Thanks to everyone

  • Author

Our Z has a leaking front cover I need another, cleared restriction in fuel system she starts up, brake pedal spongy and rpm go up when applied, hold steady 17 inches of vacuum drops to 14 when braking, fair acceleration up to 3000 than flat, the engine

temp is good and so is the oil pressure, does not deisel on shut down,occassional she backfires on hard accel. How close am I???????????????????? Sounds like maybe I am

a tooth off on the distributor so advance is lagging and I need a timing cover anybody.

If you are getting plenty of fuel, the I would check the TPS and the AFM. Look in the downloads section (top toolbar) and get the Fuel Injection Bible and check your settings. Backfire on acceleration, etc. has me thinking the AFM needs testing.

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