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husker_boxster

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Reply with quote  #1 
Hello,
1st post.  Just bought a 77 bug conv with FI that does not run.  Seller told me it would start but only run for a short time.  Found a post here from a few yrs back saying it's probably an air leak.

When I looked at the car, it would turn over but not start.  The ad said it was running prior to him doing a plugs, points, and dist cap change, along with changing some air hoses. 

Since it's not running at all, I figured I'd check his maintenance work, just for good measure.  Based on info I've found on the 'net, if I line up the crankshaft pulley with the block, I'd have the motor at TDC on #1 cyl.  Then removing the dist cap, the rotor should be at 4 o'clock and under the #1 spark plug.  The firing order should be 1-4-3-2.

So with the pulley lined up, the rotor is at 8 o'clock and pointing at what he has as the #3 plug.  He has the wires in the proper 1-4-3-2 order, but they seem to be rotated counter clockwise 1 spot.  I tried swapping #3 & #1 and #2 & #4, thinking he had the plugs backwards based on the rotor location.  No go.  It spins but doesn't attempt to fire.  So I put the plug wires back the way they were.

There is gas (can easily smell it) and I checked the coil wire has spark to the dist.

Attached are some fuzzy pics (not my camera) but you can see how the plugs are wired and where the rotor is pointing.

Any suggestions?  Thanks. engine_1.JPG  engine_2.JPG 


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husker_boxster

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Reply with quote  #2 
New day, new rotor location.

Thought I'd take some better pics.  I lined up the crankshaft pulley tonight after work, pulled the dist cap, and the rotor was lined up under #1.  What?!?  Does this look correct now?

But it's still not running.  No one has any ideas?

Attached Images
Click image for larger version - Name: DSCN1856.JPG, Views: 9, Size: 138.45 KB  Click image for larger version - Name: DSCN1854.JPG, Views: 10, Size: 403.15 KB  Click image for larger version - Name: DSCN1855.JPG, Views: 11, Size: 599.67 KB 

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BugMeVideo

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Reply with quote  #3 
The notch will come up on #1 and #3.  Unless you have done some major changing of the distributor the timing is not likely the starting problem.  On the fuel injection cars the double relay under the back seat is often the problem.  Part of the relay turns on the pump and part powers the brain box.  Often the points are burned to one or both of the circuits and work sporadically.  If you just can't get it figured out give me a call at 1 800 662 0071 and I will try to help.  Hang in there.  It is probably not that big of a problem.


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husker_boxster

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Reply with quote  #4 
Thanks Rick.

I'll play with the relay, it sounds plausible.

An update...
I understood the previous owner to say he'd put new plugs in.  I took the rear seat cushion out and found a bunch of new parts, incl 4 new plugs.  So I decided to check what was in the engine.  Old plugs plus 3 of the 4 were missing the cap on top of the plug.  Can't get a good connection that way.  So I replaced the plugs and it started up and ran will with a little dist adjustment.

So the next day I got brave and went out for a little drive.  Ran well, so I went a bit further.  Then it started to run rough and didn't have enough power to drive.  It would stop but always start but not run well enough drive.  My neighbor came over and assisted with a tow home.

The next day it wouldn't turn over at all.  Initially, there were no sounds.  I unplugged / plugged the 2 plugs in the brain box and now I hear a clicking noise there, but still no engine turning over.

Is the relay something that can be bought somewhere?  Doubt the VW dealer would have it.

Thanks for any assitance.  It shined up very nicely and it drove well the little bit I had it running.
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BugMeVideo

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Reply with quote  #5 
I doubt you can buy a new brain box.  They seldom are the problem.  I would have the battery checked out.  The brain has to have enough current to work right.  Dirt in the gas tank is often a problem in the old bugs.  Injectors could be a problem if dirty.  It is all a process of elimination.
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Rick Higgins
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husker_boxster

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Reply with quote  #6 
Sorry, I meant the relay under the seat.  Anyone know the part # or where to find one?
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