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totally lost; engine runs good, but only at 30 degrees out
Topic Started: May 6 2012, 03:00 PM (476 Views)
1oldude
Fresh Fish
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I have a 93 metro, 3 cyl., at. The car runs decent, but only with the timing about 30 degrees advanced. I have had literally 6 or 7 mechanics work on this problem and not one could figure out the problem. The timing is set tdc. One guy with over 30 years experience as a mechanic wouldn't even take my money, because he had never seen such a problem. He spent about 6 hours and couldn't figure it out. The car will run good for a while then start surging at about 35-45 mph. Fuel pump, sending unit, injector, filter have all been replaced. New oil pump, water pump, and engine clatters now. Can anybody tell me whats up with this thing.? :banghead
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Rooy


Woodruff key on the crank gear sheared?
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Bad Bent
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Facetious Educated Donkey

Welcome to your new forum, 1oldude! :coffee

Surging is usually a vacuum leak. but check Rooy's suggestion. A bad Woodruf key will make the following moot.

I suspect the timing belt is off a tooth or it could be VERY stretched. Is it new? If so try this...
1. Remove the Alt. belt, water/crank pulleys and timing belt cover.
2. make sure engine is at TDC of the compression stroke of #1 cylinder, the far left one.
3. Align the crank sprocket timing mark (a dot on a tooth) at 12 o'clock, there is a mark on the crank.
4. Remove the distributor cap and see where the rotor is. It should be at about 11 o'clock.
5. Since you say it is 30o advanced I suspect the rotor will be at 1 o'clock and then you will need to loosen the timing belt tensioner, slide the timing belt off the cam gear, rotate the cam CW one tooth and reinstall the timing belt.
6. Note: I have had the valve springs want to rotate the cam from the correct position. Don't let them do that. :rasp

You rotate the engine twice by hand and the timing marks should line up with the dist. rotor at around 11 o'clock. I've held the crank pulley in position as I rotate the crank by had so I can see the timing mark on the pulley come to 8-5o and check to see that the dist. rotor is at the #1 post (11 ish).

Hope that helps.
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Coche Blanco
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Compression test never hurt.
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