Just picked up my 1995 NSX after being stored for 6 months, and it feels as if it has a misfire, but no check engine light shows. I'm a believer that things that go wrong with cars, and especially strong ones like the NSX, tend to be due a chain of events rather than a part failing, I'll give you my two theories.
First, the symptoms. At idle, the engine seems to hunt, up to 3k rpm it feels like a misfire, but no check engine light. Above that it seems to clear, but run with less power (because the ear can't detect the misfire at higher rpm?). At 80 mph at steady throttle it feels a bit stop/start - as if the car clears its throat momentarily and then reverts. It's quite happy at that speed though.
Also the EPS light is on. I've got the battery up to speed - a run of 300 miles - and reset the clock fuse. The light comes back on, it seems when a certain speed is reached rather than steering input or time. When the car is started with the light off, the power steering continues to work even if the light comes on. Start it with the light on, and there's no power steering.
Some background. The car's been sitting outside with no cover for 6 months. At the start of that time, the timing belt was changed. The mechanic noted the misfire, but put it down to needing a good run as it was continuously driven in and out of the garage. He also changed the plugs, as he though that may be the issue. It wasn't - I've now driven 300 miles, but it's no better.
So, theory 1. The timing is out due to incorrect fitment of the belt when changed.
Theory 2. The EPS and the engine ecu are connected somehow - I've seen some suggestion that pulling the clock fuse resets the ECU. Whether that is the steering ecu or engine I'm not able to ascertain. Could they be connected?
Other simple possibilities?
Coil packs
All help gratefully received
Cheers
Matt
1995 NSX-T - 210,000 miles...
First, the symptoms. At idle, the engine seems to hunt, up to 3k rpm it feels like a misfire, but no check engine light. Above that it seems to clear, but run with less power (because the ear can't detect the misfire at higher rpm?). At 80 mph at steady throttle it feels a bit stop/start - as if the car clears its throat momentarily and then reverts. It's quite happy at that speed though.
Also the EPS light is on. I've got the battery up to speed - a run of 300 miles - and reset the clock fuse. The light comes back on, it seems when a certain speed is reached rather than steering input or time. When the car is started with the light off, the power steering continues to work even if the light comes on. Start it with the light on, and there's no power steering.
Some background. The car's been sitting outside with no cover for 6 months. At the start of that time, the timing belt was changed. The mechanic noted the misfire, but put it down to needing a good run as it was continuously driven in and out of the garage. He also changed the plugs, as he though that may be the issue. It wasn't - I've now driven 300 miles, but it's no better.
So, theory 1. The timing is out due to incorrect fitment of the belt when changed.
Theory 2. The EPS and the engine ecu are connected somehow - I've seen some suggestion that pulling the clock fuse resets the ECU. Whether that is the steering ecu or engine I'm not able to ascertain. Could they be connected?
Other simple possibilities?
Coil packs
All help gratefully received
Cheers
Matt
1995 NSX-T - 210,000 miles...