R32 With Odd Issue

[insanemal]

My GTR had a leak from the master clutch cylinder. So I jacked it up and had a look to make sure it was just the master and not something more sinister. Master was shot and so was the booster. It was jacked up on and angle like / (well not that steep but you get the idea). Anywho the car started to randomly drop out and the computer would freak.

I took it to a mechanic and they said it was caused by leaky injectors. They let air in apparently. So one service, set of new injectors and clutch master and booster later and the car was running quite well.

I drove it from Springwood to the city (back to my office) then a few times that day, then back home that night. It ran great! The next morning it started, I reversed down my driveway and it died. Now it keeps doing it, just like it did before I took it in. Also when you turn it off it continues to run much like "Dieseling" however this cannot be the case as it was not doing it the day before.

I have no idea what is going on or where to start looking. The car has stock injectors, fuel pumps and other such things. The only 'major' bolt on is a piggy back in the ECU from some random jap tuning house.

As I said, I'm stumped. It's going back to the mechanics but well i figure there is a learned person here who might have some idea that may allow me to get it resolved without having to fork out more cash (well less cash i guess)

[mad082]

when you say 'dieseling', do you mean that you turn the key off and it continues to run? if so, that's a bad sign. it means you either have a short in the electronics somewhere that isn't telling the ignition and fuel to stop, or you have seriously leaking injectors and possibly have hot spots in the cylinder that are igniting the fuel (generally the cylinder temps won't be hot enough to keep igniting fuel). the missus old datsun stanza used to suffer from 'run on' only after giving it a thrashing and the engine got really hot (hot enough to continue the ignite the fuel at idle).

i'd be taking it back to where you got the injectors put in. maybe they damaged an O-ring in the process and it is causing the leak, or possible one of the injectors is faulty. if this is the case then there is potention for serious damage to occur. the last thing you want to do is to try to start a car with a substantial amount of fuel in the cylinder

[insanemal]

Yeah, I took it back. Apparently the battery was randomly dropping a cell. This was causing the car to not switch off correctly. They fixed that. (new battery) BAM no more dieseling. BUT it ran good for 1 day.. then after a long drive.. the next day.. It wont start. Cranks good.. but it just wont catch.

[insanemal]

So anyway It went back.. and it plays up randomly for the mechanic. But they still cant find the issue. Its seriously frustrating. If anybody has any idea, I'd probably pony up cash if it fixed it. If that is.