I need help on this problem:

'86 190E 16V w/187k with manual 5-Speed
Have had some problems with loosing power at higher altitude or after driving for 4-5 hours. I never was able to pinpoint the exact problem since it was very intermittent. Now the problem looks like it is here to stay.

It will idle, not great, but it does idle. However, it has no power and will not rev past 3000 rpm even in neutral. It seems like it's just not getting fuel at the higher rpm's. I have replaced the fuel pump and filter, removed the exhaust (it almost acts like the exhaust is blocked), and replaced the ECU. All with no change.

Has anybody ever run into a problem like this?

Thanks for the help -- I need it!

dbenz

I would suspect the EHA valve is malfunctioning. The EHA is also supposed to correct for altitude differences, might be worth a check. EHA valve doesn't need to be 16v specific, the valve from an 87 2.3 8v is the same. Might be worth snagging from the junkyard just for the sake of troubleshooting. Usually you can test the EHA amperage with a multimeter but since your problem is erratic it may not appear out of order. Look for part number 000 070 39 62. Hell, I might even have one I can send your way.