Power and whine at cd unit but no spark

[timmy2]

No green coax until '78, the 2 white or grey wires from the 3 pin connector to the coil and points are actually both coax cables.


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[tassie targa 76]

Had some trouble with the ignition system, blew up the cd unit.
So easiest option msd streetfire and master blaster 2 coil.

Got the new bits In today pretty easy job. Started straight up after 2 1/2 years.

1 fuel leak, tighten banjo fitting fixed.

Idle around 1000 but sounded like a miss, so remove 1 plug lead at a time wierd no difference, let engine warm up checked oil level all good.

Then next start suddenly idle at 2000 I think the timing is a bit advanced but hard to check until I sort out why the high idle.

Miss seems to have gone at higher idle. Not keen to just lower idle at idle screw as car never idled this high before have retarded timing a bit but idle stays high

Tried removing 1 electrical connector at at time from the different engine cold and warm start stuff no change.

Will do a few searches but if anyone has any ideas would be glad to hear them

[timmy2]

Perhaps the combination of a repaired fuel leak and having re-seated all the plug wiring was enough to fix an old problem and the engine is happily running where it was set to compensate for old problems.
Throttle linkage could be binding. Or you have a new vacuum leak.
Did you run it long enough for the WUR to work and lower the rpms. May just be a real high cold idle.

If all seems normal just lower the idle and check the timing once it is at full operating temperature.

[Charles Freeborn]

I had ignition problems that i finally traced back to a faulty low tension connection at the coil. The push on style leads are crappy at best. I cut them off, replaced with eyelets, threaded the posts coming out of the coil and all's right.
-C

[tassie targa 76]

G,day Dennis,

The engine was running a bit fluffy but at a good idle speed, ran for about 10 mins on and off while check individual spark to find the miss,

After checking the plug leads let it run for a while, engine at full temp.

Then shut down for a couple of minutes on restart suddenly 2000 rpm at idle and would not lower to normal .

Before engine came out it ran fine but was a bit hard to cold start.

Only change is all new vacuum hoses pretty sure no leaks there, new msd street fire and coil, but the original engine harness was shot and I don't think any of the CIS electric components were connected, I have rebuilt the harness and fitted new connectors (Thanks to your good self) just wondering if as you suggest the tune was set to compensate for all the faults that are now hopefully fixed.

Hoping to get some time on it tomorrow

Will start by double checking vacuum hoses,

Any ideas on some start up checks before the engine warms up

[timmy2]

As far as start up checks, I would definitely install a fuel pressure gauge and make sure everything in the system is in spec. Check System, Cold start, Warm running fuel pressures to make sure the WUR is functioning correctly. (all can be checked without starting the car)

Then give it a start after checking the vacuum hoses you wanted to check.

If everything is functioning normally, then it is tuning and idle adjustments from there.

Do you have a way to check the CO levels in the exhaust? Important for checking the mixture is set correctly once you get your idle down.

Your car is looking great! The ride height looks a little high but I'm sure adding back all the missing bits will help bring it down to earth again.

[tassie targa 76]

Don't have a co gauge or fuel pressure gauge but are on the list, have a few contact that may be able to help.

Car is still a long way from done, brakes are all in but not yet tested, suspension in but not adjusted, wheel alignment needed, once I get it running right and sort out a few minor wiring issues like brake and indicator lights, I will be able to drive it from one workshop to the next. At least that will be driving it instead of trailering.

Still haven't started on any interior, but have to wire in new alarm, stereo, electric door locks and a few other hidden bits just for me.

Thinking of black leather with black and white hounds tooth inserts similar to the 911 50th edition

[tassie targa 76]

Thanks to who ever owns this beauty for the picture

[zelrik911]

Originally Posted by timmy2

As far as start up checks, I would definitely install a fuel pressure gauge and make sure everything in the system is in spec. Check System, Cold start, Warm running fuel pressures to make sure the WUR is functioning correctly. (all can be checked without starting the car)

I also recommend you borrow/buy a fuel pressure gauge set for testing & tuning your CIS.
I had an experience where a CIS car (not P.) sat for a while and the fuel return to the CIS tank had blocked. This caused a very high fuel pressure over the whole system which was very hard to properly diagnose without a pressure gauge.
I unblocked the return - not easy on CIS tanks !!! - and a lot of things returned to normal.