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Messages - jo.adam.kay
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Mk2 Golf Chat / Mystery starting issue 1.8 GTi PB- help!
My 8v GTI digifant has an ongoing starting issue. It takes a good 5 seconds turning the engine over before it fires and then it runs really lumpy. After a little throttle for a few seconds it clears and runs great. Car pulls really well when driving. No smoke etc and gets good MPG when I’m cruising along.
Car has had a full diagnostic and tune. Plugs, rotor, cap, leads and coil all good. Recent new idle valve, both fuel pumps have been replaced and prime as you would expect.
Battery has full charge and volt meter is showing good volts when running. Throttle body switches are working and lots of the connectors have been cleaned. No vacuum leaks. Blue temp sensor tested.
Injectors have been tested and are in great condition.
It occasionally starts fine, usually in the morning. When it’s been to the garage to check for known faults, with no solution found, it starts fine for a couple of days then the problem returns. If I restart the engine within a couple of minutes of turning it off it works fine.
Engine was rebuilt last year by previous owner and has run fine until now.
Good oil pressure on start up. In the recent hot weather with oil temp at 130c oil pressure at idle can drop to an indicated .6 bar but no oil pressure warnings on dash.
My local specialist who knows these engines very well is now expecting an electrical issue.
But I would love some input from other MK2 owners. Thanks in advance for any suggestions