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> L jet miss, at speed on accel on decel
qa1142
post Jun 19 2005, 02:25 PM
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So I have a 1.8 with L jet. I have miss that is complete loss of power. Tach does not bounce so not likely ignition related.

I replaced dual relay and keep looking for bad grounds.

Happens at any speed, any rpm, during accel or decel or when just crusing at any speed. not at idle.

Some days not there at all, other days only after several hours, other days, right from start. Hot cold raining dry may be there or not.

Any ideas? (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)
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ClayPerrine
post Jun 20 2005, 01:27 PM
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FWIW.. ECU failure is so rare as to be almost non-existent. After saying that, I will also say that I have a dead one at home.


Check the rubber tube between the air flow meter and the throttle body for cracks or splits. Check carefully in the valleys of the pleats. If it is split, it will introduce false air into the system. The air bypasses the AFM, and because of that the engine will run lean to the point of power loss. Also make sure that you have no vacuum leaks, and check the oil cap seals.


If that doesn't fix it, check to make sure that you don't have a VW Beetle air flow meter. A lot of the FLAPS out there will sell you a Beetle AFM, and the calibration is completely wrong for a Type -IV. I bought one from AA, and it was the part number and calibration for a Beetle.

Whatever you do, don't open up the air flow meter and start monkeying with the innards. There are special tools that are required to recalibrate one correctly, and the average person doesn't have them.


If I can help in any way, just let me know.

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