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Discussion Starter #1
Hi, I have a n/a zx and I just put a crane XR3000 ignition on it, now the engine starts everytime on the first try, but when i hit 60mph my acceleration stops almost completely. I've had the car up to 80 before(and it was still pulling good), and now I can barely reach 70. any ideas? My hookups for the ignition are per the instructions, but i didn't bypass the ballast resistor (can't find it).

TJ
 

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What model XR3000 do you have?

Is both your vacuum and mechanical advance working properly?

What did you set the timing to? 10 degrees BTDC at 700 RPM?

At what engine RPM does it loose power? (speed is meaningless you can do 60 MPH / 100 KPH in 3rd, 4th and 5th)

Can you get 5,000 RPM, or higher, out of it in 1st and 2nd?

The 79 280 ZX does not have a ballast resistor in the ignition system.

Wayne Monteath
Masham, Quebec.
 

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Discussion Starter #3
Ok, my timing is set a 10 degrees btdc, the model number of XR3000 is 3000-0292, the engine loses power at 3000 in third gear, and about 3800 in second gear, but in first gear i get good power to 5000. How would i check to see if my mechanical or vaccum advance is working correctly? I know they were fine before i put the new ignition in. Could my problem be the phasing of the optical sensor? I set it up per instructions, but instead of a diagnostic light (my unit doesn't have one) i had to leave the ignition on and slide the sensor until i heard the injector click, and thats how i set it.
 

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sounds weird, i can get 65 outta second in my 240 =)

i dont know much about crane systems though, why did you switch from the stock set up which is pretty decent to begin with? were you having probs wiht the stock distributor?
 

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As far as checking the advance units go here:

http://members.home.net/julioa/Zbyter/280ZXrepairs/79ZXdistributorEx.html

If you can not read anything, please let me know, it is a work in progress.

Are the installation instructions from Crane, document # 9000-2000A?

If they are, I can not find any reference to " slide the sensor until i heard the injector click". The section "Optical Trigger Adjustment Procedure" on page 13 - 14 refers to using the Ignition Coil output to check for spark. So I need more info about what "instructions" you are referring to.

Do you have lateral play in the Dizzy shaft? Can you move the rotor sideways, if more than 0.010 the bushings are shot.

Finally, as ZmeFly asked, Why did you make this change to your original OEM set-up?

One of the things about the Z'ed and Hitachi Dizzy's is that the timing adjustment plate bolts to the bottom of the dizzy. It also has as slot in it, in a perfect dizzy it should be in the middle of its travel if the oil pump drive shaft and cam are correctly aligned up.

Note, that the Crane instructions, on page 12, "Quick Test for a Ballast Resistance" are not accurate for the 79 280 ZX. Our coils do not use a Ballast Resistor and our OEM coils should have a primary side resistance of 0.84 to 1.02 ohms and the secondary side should be 8.2 to 12.4 K ohms. These values are for the coil from a N/A. The turbo coil is different.

Wayne Monteath
Masham, Quebec.
 

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Discussion Starter #6
Hi, no, my instructions are number 9000-0700. And "slide the sensor until i heard the injector click" was my method, because my unit, although brand new doesn't have the diagnostic LED in it which would allow a simple optical trigger adjustment. The reason why I switched to a different ignition was for better spark, and plus it solved my bad starting problem. That problem was that the car would sometimes start right up, but others it would take 10 to 30 seconds of cranking to get it to start.
 

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Discussion Starter #7
Success!

Hi, thanks for your help, I found the problem. The sensor wasn't adjusted right. I finally figured out how to, no thanks to the instructions. My car has its bite back!
 

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Re: Success!

Ok, so unless I completely misunderstand what you have, I think you have the wrong instructions for your unit.

This is from:

http://www.cranecams.com/instructions/electronics.htm#Ignitions

XR700 & XR3000
Part Number(s) 700-0001, 700-0020, 700-0021, 700-0226, 700-0231, 700-0292, 700-0300, 700-0309, 700-6231, 710-0231, 720-0001, 720-0231, 3000-0001, 3000-0021, 3000-0226, 3000-0231, 3000-0292
Instruction Number 9000-2000A

XR700 & XR3000 (For unit with light on the end)
Part Number(s) 700-0001, 700-0020, 700-0021, 700-0226, 700-0231, 700-0292, 700-0300, 700-0309, 700-6231, 710-0231, 3000-0001, 3000-0021, 3000-0226, 3000-0231, 3000-0292
Instruction Number 9000-0700

Did you check the vacuum / mechanical advance for correct operation?

IMHO the OEM dizzy using the reluctor / stator and ignition module is superior to the Crane system using an optical trigger. Optical trigger systems will get dirty and then must be cleaned. On the 79 Zed using the OEM dizzy AND a High Output coil is about as good as it gets (bang for the buck) on a stock system.

Wayne Monteath
Masham, Quebec.
 

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Re: Success!

Instruction Number 9000-0700-that is the set of instructions i have, and as you said, it is the wrong set because my unit doesn't have the diagnostic led. But, I did get it adjusted right, and it starts up everytime, and runs just as good, if not better than when the stock ignition was in use. The major reason I am keeping the xr3000 is that I now get consistant starts, instead of cranking the engine for 15-30 seconds waiting for it to start, which is what was happening with the old ignition-even when i put a performance coil on.

TJ
 
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