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Sluggish 855T Turbo 850 1994

posted by  rsmigel on  Tue May 31 14:08 CST 2016
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last visit: Thu Aug 11 21:30 CST 2011
[RELATED]

Wife's car just threw a "check engine" light on the highway and read as a P0171. No other codes stored and this the is first CEL I've seen on this car in years.

I drove the car and noticed very low turbo boost... only 1/4 of the way in the white scale (I've got another boost gage coming and will report back with a more accurate reading) Performance matches the gage: sluggish with little torque. Gage on vacuum side looks good, 3/4 to the far left on deceleration and 1/2 on idle.

EGR system was replaced 25K miles ago. All vacuum hoses were replaced at the same time. Mileage is 181K.

I popped the hood and checked the big turbo hoses and every vacuum hose I could trace without disassembly. Everything looked fine.

Drove car another 100 miles w/o CEL light coming on. Added a can of octane booster and saw no performance improvement.

The car burns no oil.

I have an ACTRON CP9575 ( https://actron.com/sites/default/files/0002-000-3106_cp9575_mnl_english.pdf )to use for further study if it will be of any help.

Suggestions???





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