AboutJohn McInnis Expertise Land Rover Discovery.
I've had most of the common mechanical failures, altenator, water leaks, wiper failure, door/hinge problems, roof rust, floor rust, loads of electrical problems. Remember, I'm not a dealer or a mechanic, just an owner like most of you.
Experience
Experience Owner of a Discovery. I've had many mishaps with our Disco but I still like this vehicle. Talk to a fellow LR owner instead of a dealership rep. I'm not in this for the money. I'm just an owner who wants to help others.
Question Hello and thank you John please help me, my 1997 LR Disco 1 when you first turn it on it might idle way to high (anywere between 1500rpm and highest Ive seen it go is 3700rpm in park or on the other hand sometimes I start it and it will rev so low that is will stall or almost stall unless i give it a bit of gas. If I put the truck in drive i will go about 50-60 without touching the gas pedal. PLease help thank you for your time. I hope it will not be too expensive to fix because I have fel in love with this truck!!!!!
Answer Hi James,
this sounds like the Throttle Position Sensor (TPS) and you could probably do replace this yourself. There are other possible causes but the symptoms you describe sound like those my '95 Disco experienced many years ago.
At that time, the dealer swapped out the MAF, the crankshaft position sensor, tried to con me into buying a new ECU (which I refused - $3000? NO WAY!!!) Long story - short: turned out to be the TPS and dealer charged me $585. In retrospect, I should have done it myself and saved $300+
