RV8 tending to stall after a hot restart.
Discussion
Help please.
My V8S starts on the button from cold.
My problem is that when starting from hot, the engine fires 'eagerly' - but then the revs just fade or tend to hunt, unless I give a little throttle to 'hold' the tickover.
Once I've gone through this 'procedure', the tickover is fine when hot - as I say it is just on a hot restart and lasts for about 30 secs to 1 minute.
I've had the stepper motor out and cleaned it - put back ensuring no air leaks. I'm guessing but - should I look at the throttle position sensor on the plenum casing? Or is it a temperature input to the ecu?
Advice please. Nick
My V8S starts on the button from cold.
My problem is that when starting from hot, the engine fires 'eagerly' - but then the revs just fade or tend to hunt, unless I give a little throttle to 'hold' the tickover.
Once I've gone through this 'procedure', the tickover is fine when hot - as I say it is just on a hot restart and lasts for about 30 secs to 1 minute.
I've had the stepper motor out and cleaned it - put back ensuring no air leaks. I'm guessing but - should I look at the throttle position sensor on the plenum casing? Or is it a temperature input to the ecu?
Advice please. Nick
keithyboy said:
Nick, try checking the coolant temperature sensor on the inlet manifold (adjacent to the thermostat housing). The wiring from this can either come loose or more likely go brittle with heat. This would cause the problems you describe. Hope this helps. Let us know how you get on.
Keith, thanks! I'll have a look see after work today.
Had the problem for a little while - and had the engine and 'box out last April to replace the clutch release bearing carrier - - maybe it got disturbed then! Again, cheers! Nick.
keithyboy said:
Nick, try checking the coolant temperature sensor on the inlet manifold (adjacent to the thermostat housing). The wiring from this can either come loose or more likely go brittle with heat. This would cause the problems you describe. Hope this helps. Let us know how you get on.
Keith,
Had a look in the fading light last night. The plug (metal spring clip retainer type) and socket looked fine, with the terminals looking bright and uncorroded.
What I didn't do is strip back the rubber shroud and check the wiring. Having said that, the cable (2 core) felt flexible enough.
Maybe its a job for the weekend - but any more thoughts welcome
Thanks for your input Z, I would say that I don't think its a fuel vapourisation problem as it has only occured in the last couple of months. It was not apparent say, 2 years ago.
>> Edited by nawarne on Wednesday 19th January 08:18
My Griff has always suffered from this symptom. Its OK if I'm stopped for ten minutes or so, but if I stop just long enough to fill the tank it will often not idle for a while afterwards. Sometimes I just give it some throttle and drive off, but recently someone suggested I switch the ignition on and off a couple of times before starting, to flush vapourised fuel out of the rail. This appears to work.
>> Edited by rick.e on Thursday 20th January 19:37
>> Edited by rick.e on Thursday 20th January 19:37
rick.e said:
My Griff has always suffered from this symptom. Its OK if I'm stopped for ten minutes or so, but if I stop just long enough to fill the tank it will often not idle for a while afterwards. Sometimes I just give it some throttle and drive off, but recently someone suggested I switch the ignition on and off a couple of times before starting, to flush vapourised fuel out of the rail. This appears to work.
>> Edited by rick.e on Thursday 20th January 19:37
OK Rick,
I'll give this a whirl - it may help to prove or disprove Z's theory. Thanks, Nick
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