Intermittent Slightly Sluggish Start 1.8T
Very unusually for my runabout, these last few weeks I have been experiencing a sluggish start before the engine catches when the engine is cold. This occurs in very low outside temp and when relatively warm, perhaps 1 in 6 start ups are sluggish.
The engine runs perfectly right up to the redline once running. Excellent fuel pressure reading (not backed off or extruded elastomer at the filter housing) at shraeder valve and before the inlet manifold. Initially I thought it was the fuel pump relay, due to my perceived lack of prime when turning the engine to ignition switch to position II, but it turns out I was getting prime. I changed the fuel pump relay out as a matter of course but this has made no perceivable difference. I have not run T4 diagnostics yet, but now I am focusing on the cam or crank sensor. Anybody have any comments on this scenario? |
I had a similar scenario with my 45 in very cold weather. I was in the habit of letting the fuel run very low before filling up. On occasions it struggled to start and it briefly brought the EML on. I took a fault code reading and it came back as fuel starvation and misfire on 3. I put a new set of plugs in and made sure I didn't let the tank run so low and haven't had a problem since.
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Would have thought it was quite normal in the cold weather tbh.
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Every now and again I get a little delay before it fires up independent of whether it is cold or hot outside temperature. |
Sluggish starts ???----You've not mentioned the battery.
Bit low on charge ??? Needs at least 12.8 volts for a fast start. Multi-meter time.---:D |
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12.1v this morning so a new battery it is then. :}
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Inlet manifold gasket leak comes to mind. Any misfire and white smoke on start up? Things usually clear once the engine warms and the coolant is expelled from the cylinder/s.:shrug:
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