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914World.com _ 914World Garage _ What's going on

Posted by: Teknon Oct 3 2004, 09:06 AM

Finally got my car started. But it breaks up and sputters hard at 4500 rpm and hesitates badly on accelleration. Is there any test I can do to isolate the problem. So I can fix what's wrong. It is still a blast to drive with the problem.

Posted by: Bleyseng Oct 3 2004, 09:12 AM

Check the timing..
Change the fuel filter
Is it running rich?
adjust the valves..
New points,cap,plug wires

Ton of stuff to look at..

Geoff

Posted by: SLITS Oct 3 2004, 10:05 AM

FI or Carbs?

Points or electronic?

Age of engine?

Need some info to guess.

Posted by: Teknon Oct 3 2004, 10:21 AM

1970 1.7 d-jetronic with electronic distributor

Posted by: nebreitling Oct 3 2004, 12:07 PM

i suspect ignition before FI in cases where you have a specific "hole" in acceleration.

Posted by: airsix Oct 3 2004, 12:21 PM

Adjust the point dwell and then set the timing. Lightly lube the leading edge of the phenolic (sp?) cam follower (on the points). Can't promise this is the problem, but symptoms sound right for points that are barely opening.

-Ben M.

Posted by: SLITS Oct 3 2004, 11:26 PM

Since you have electronic ignition, the dwell angle is not a factor unless the module is breaking down.

1. Age of spark plugs wires - if they are old they can cross fire with each other and/or to ground.
2. Check for high tension tracking inside the cap (black tracks running down the side or between poles.
3. I assume you do not have a rev limiting rotor - if you do, change it.
4. Spark plugs - new or ?. What type.
5. Bad tracks in Throttle Position Sensor
6. Dirty or defective trigger points.
7. Mal adjusted valves or weak valve springs.

Just a few guesses...................

Posted by: Tab914 Oct 4 2004, 12:37 AM

I agree with Slits. Had the same problem and it was due to bad tracks in the throttle switch. Just check everything else to make sure the rest is set where it should be.

Posted by: Teknon Oct 4 2004, 07:35 AM

Thanks fellow 914ers. I will start my trek to the electical system. Thanks for the heads up. Joe