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760T dropping cylinders under load when warm 700 1990

posted by  Big Harry on  Wed Nov 26 02:33 CST 2008
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last visit: Sun Sep 21 11:06 CST 2014
[RELATED]

Have you checked the intake hoses for leaks on the underside? The oil lays up in them and causes the hose to soften from the inside bottom (usually). Run your hand under the intake hose at the manifold entry and see if it is wet or has a hole in it.

The problem could also be the ECT sensor under the third intake runner(good info in the 700/900 FAQs). When they fail the car either runs very rich or very lean when it warms up. It sounds like your air/fuel ratio is somehow getting screwed up after warmup.

Low fuel pressure at the rail could be a problem also. Check the pressure regulator function and check the fuel line pressure.

Regards,

--
Will Dallas, www.willdallas.us, www.willdallas.org, www.willdallas.com, www.dallasprecision.com 86 245 DL 222K miles, 93 940 260K miles, 88 765 GLE 152K miles, 88 780 246K miles






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