SER1 RR Classic Q

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Hey Team-

I know this isn't a Series One question, but it is a Land Rover!  My RR
Classic (93 3.9L ABS SWB) has a "surging" issue when running at about
2250-2500rpm.  It seems to run fine when going down the road.  When I turn
on most any electrical accessory in the truck like the headlights, fan, AC,
windscreen defroster or rear defroster, it starts to run poorly and surge.
It is a similar feeling to when you have an air leak in a 2L engine's fuel
line like a loose connection a the pump or carb.  When running at other
RPMs, especially higher revs when the engine kicks down a gear, it runs fine
and the surging goes away.  Or, if I downshift and run the revs at 3000+, it
runs fine.  The RR has a new alternator (genuine LR), new rotor & cap, new
plugs and wires and the breather system and canister have recently been
cleaned.  I'm running an NRP stainless exhaust with original O2 sensors.
The engine has about 190k miles on it.   Both my mechanic and I have felt we
have exhausted our leads.  He is chalking it up to an old engine.

There are some very savvy folks on the list.  Thought you all might have
some ideas on fixing or troubleshooting the problem.

Thanks in advance.

matt
______________________________
Matthew J. Clark
Seattle, Washington
206.932.4610
107 Station Wagon
SWB Classic Range Rover
TDI 110 Station Wagon


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