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 Posted: Mon Oct 03, 2011 2:10 pm |
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Joined: Oct 03, 2011
Posts: 4
Trade Rating: 0
Location: england
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can anyone help?? girl friends 206 xs suffers from intermittent hot start issues, if the car is stopped for short periods when hot it will not re start until the engine temperature sensor has been unplugged. new sensor has been fitted and wiring checked. also fitted new coil pack, throttle position sensor and crank position sensor. any thoughts??????
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Posted: Mon Oct 03, 2011 2:12 pm |
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Joined: Feb 07, 2010
Posts: 3085
Trade Rating: +12
Location: Essex
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has the fault codes been cleared....
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Posted: Mon Oct 03, 2011 2:24 pm |
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Joined: Oct 03, 2011
Posts: 4
Trade Rating: 0
Location: england
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there are no codes being stored,haven't had engine management light up either.
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Posted: Tue Oct 04, 2011 4:41 am |
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Joined: Apr 15, 2010
Posts: 514
Trade Rating: +1
Location: Eastbourne
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does it turn over? when hot just not fire? if not it could be a bad starter motor is not disengaging when you start it causing it to get hot.
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| *DEAD*206 Gti 138
Toyota Celica T sport 205 BHP | |
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Posted: Tue Oct 04, 2011 1:15 pm |
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Joined: Oct 03, 2011
Posts: 4
Trade Rating: 0
Location: england
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it cranks over no problem. if you floor the throttle it will try and start but fire really roughly but only whilst the throttle is floored, soon as you lift off it dies. after unplugging the temp sensor, it goes as if it never had a problem. such a wierd problem, i'm at a complete loss.
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Posted: Tue Oct 04, 2011 2:27 pm |
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Joined: Aug 01, 2011
Posts: 390
Trade Rating: 0
Location: Bath UK
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Sounds like you have a poor contact at your engine temp sensor (ETS) or possibly at the ECU. What does your dash eng temp gauge tell you? Is it showing normal when doing a hot start?
Back probe the ETS.
With engine hot, turn the engine off and have just ignition on. Check the voltage at the ETS by inserting a pin into the back of the ETS connector. Should have 5v supply and return voltage will depend on eng temp. Should be close to 4.5v on hot engine, closer to 1v on a freezing engine
If there is a high resistance there when engine is hot then return voltage will be low, ECU thinks it's a cold engine and puts too much fuel in, that makes starting difficult unless you put loads of air in with the throttle wide open and then it coughs and splutters as it clears the excess fuel
When you disconnect the ETS then ECU guesses from the inlet air temp what the engine temp is
If the ETS return signal is good then I'd back probe the ECU connector and see if that ETS signal is getting to the ECU
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Posted: Wed Oct 05, 2011 4:33 pm |
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Joined: Oct 03, 2011
Posts: 4
Trade Rating: 0
Location: england
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cheers deckchair,
best answer yet, i'll give it a shot when i next have a day off as i haven't looked to the ecu yet(replacement cost!!!). will let you know the the result.
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