Just picked up my 412 it's been in storage for a year and sat outside for a couple of months (uk weather) Drove her home 10 miles but no power just wondered on reasons ..spark plugs ? Your thoughts would be appreciated Thanks
Nick, Your post is a little light on info. If you can be a bit more descriptive, we may be able to help with the diagnosis. Regards, Art S.
412 has the same ignition system as TR and the 3.2 V8's. Losing the ignition on one bank does happen on those and the single biggest cause of that is a failure of the transistor module on the coil. But sitting long periods has been known to cause fuel pump failures. You need to determine if you have a fuel or an ignition situation.
Exactly. Is it lack of power or a hesitation when pressing the throttle? If the car was stored [for a year] without having topped off the fuel tank, condensation could have resulted in water in your fuel.
Thanks guys,she revs and the engine dosn't seem lumpy , she also ticks over ok but when you accelerate there is nothing there ,could barley get above 60 mph
It will run perfectly smoothly with a dead bank of ignition or one dead fuel pump - follow Rifledriver's advice...
Yup..last one I had with this issue was a bum fuel pump relay for the right bank. Possibly the cheapest fix ever.
No, this is going at it all wrong. First things first. Figure out if it is a fuel or ignition problem. Look for specific causes later unless you want to be at this a month. The left fuel distributor has a blue electrical plug, turn the key on and disconnect the plug and you will hear the fuel pumps start to run. You may just know by feeling the input and out put lines or putting your hand under the car and feeling both pumps. That will tell you you have an operational fuel delivery system. That has eliminated the fuse, the wiring, the relay, the pumps them selves etc from consideration. Checking each part in the daisy chain at this point without even knowing which system is at fault is a real waste of time.
I had an experience twice recently with my '83 400i. After sitting for two or three weeks I fired it up on a Saturday and the car would start and idle just fine. Then it would start to idle rough and run rough. Each time I hooked the battery to a charger overnight, and the next day, Sunday, it ran as good as ever.
Ok ,please don't take the p##s but I'm no mechanic !anyway looked in boot pulled away the cover on left tank and there they were 2 wires pulled from their connectors , car runs lovely now ,on another note I'm sure this won't be so easy but the rear suspension is very bouncy ?.
Good news. There is a nitrogen filled accumulator on the rear suspension. They eventually leak. At the age of that car it would be surprising if it still had any in it. There are services that refill them and I do not believe it is expensive. I would look into doing that and see where it gets you.
before you look for anything wrong you may look if the car is running on all 12 cylinders or only on 6. then you can go on looking. all other would be a waste of time. it is important to know if running on 12 or only on 6 cylinders, because then you may look for failure(s). next then is to check if it is a fuel or an ignition problem. so please more info what happens when you do what. I think there are 2 accumulators inside? sure they are filled with nitrogen? I don´t think so. normaly inside there is a membrane and a spring. those accumulators the engine needs only for starting that the fuel pressure will not drop too much and so the pressure will be back again faster after starting.
Obviously you didn't read the post. He fixed his running problem and now has a rear suspension problem. See the words "rear suspension"?
