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Long Distance Troubleshooting 200 1988

posted by  Robert S. on  Tue Jul 30 14:43 CST 2002
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last visit: Sun Sep 21 05:48 CST 2014
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daughter's 88 245 DL; 238K miles; always has had good maintenance... trying to diagnose her troubles today over the phone while she's located at other end of the state (CA).

Symptom: Loses power at higher speeds (40-60). Has gradually worsened. Problem seems to set in after car has accelerated and is at sustained speed. Now, she's afraid to take it anywhere, fearing Murphy will set in at worst moment, e.g. nowhere to pull over if/when it stalls on freeway or a bridge.

- Starts/idles fine, warm or cold
- runs OK around the neighborhood
- Exhaust seems to be flowing freely out the tail pipe (at idle)
- No shakes, missing, screeching, squeals or buzzing sounds, "it just loses power and won't go".
- Fluids, wiring and hoses look fine (me over the phone, prompting her visual inspection at engine bay check points)

My thoughts on what it may be (almost as if it's running out of gas):

- Failing fuel pump relay
- Fuel filter
- plugged cat (original)

Any other thoughts, like failing AMM or stuck airbox thermostat?

The 88 has the infamous 25 amp blade fuse... mounted on the fender... could it contribute or is that fuse a go/no go situation? (I havent asked her to check that, yet)

Thanks for any troubleshooting ideas.

Robert






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