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Solved ✔ Engine hard to start when is hot
25-02-2022, 19:41 PM,
Post: #21
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RE: Engine hard to start when is hot
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28-02-2022, 07:05 AM,
Post: #22
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RE: Engine hard to start when is hot
check hpfp waveform using scope as described in ISTA to rule out the pump
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28-02-2022, 17:02 PM,
Post: #23
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RE: Engine hard to start when is hot
do a test, trick the control unit and tell it that the engine is cold to see if it starts well.
put the sensor outside with ice or put resistance in the sensor and tell us how it works |
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28-02-2022, 22:22 PM,
(This post was last modified: 28-02-2022, 22:31 PM by masa52.)
Post: #24
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RE: Engine hard to start when is hot
(28-02-2022, 07:05 AM)tintoverano Wrote: check hpfp waveform using scope as described in ISTA to rule out the pumpHi Bud There is no any abl for high pressure pump test only found this tests pictures attached thanks for help (28-02-2022, 17:02 PM)davito1 Wrote: do a test, trick the control unit and tell it that the engine is cold to see if it starts well. Hi the question is which sensor I done previously and disconnected coolant sensor but dde shows correct engine temp Maybe oil temp sensor is responsible for showing engine temp but the acces is not easy like coolant sensor but I dont think so this will work as if the engine is cold dde increase amount of fuel rail pressure and car starts fine |
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01-03-2022, 14:01 PM,
(This post was last modified: 01-03-2022, 14:03 PM by Clusters.)
Post: #25
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RE: Engine hard to start when is hot
[quote pid='511002' dateline='1646086957']
masa52 [quote pid='510780' dateline='1646031930'] tintoveranocheck hpfp waveform using scope as described in ISTA to rule out the pump [/quote] Hi Bud There is no any abl for high pressure pump test only found this tests pictures attached thanks for help [quote pid='510933' dateline='1646067738'] davito1do a test, trick the control unit and tell it that the engine is cold to see if it starts well. put the sensor outside with ice or put resistance in the sensor and tell us how it works [/quote] Hi the question is which sensor I done previously and disconnected coolant sensor but dde shows correct engine temp Maybe oil temp sensor is responsible for showing engine temp but the acces is not easy like coolant sensor but I dont think so this will work as if the engine is cold dde increase amount of fuel rail pressure and car starts fine [/quote] through the temperature sensor tell him that the engine is at 2 degrees of temperature for example and we rule out that the problem is something mechanical the oil sensor does not imply anything. Disconnecting the sensor does not have to mark any temperature and if you disconnect it you have to get an error code |
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03-03-2022, 14:02 PM,
Post: #26
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RE: Engine hard to start when is hot
have you tested the wiring to starter? is there a voltage drop?
also the fuel pump relay co cause such symptoms, when it starts aging |
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03-03-2022, 14:30 PM,
(This post was last modified: 03-03-2022, 16:19 PM by masa52.)
Post: #27
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RE: Engine hard to start when is hot
(03-03-2022, 14:02 PM)tintoverano Wrote: have you tested the wiring to starter? is there a voltage drop? Didn’t tested wiring as it’s only happening when is hot Have to find where is fuel pump relay so will check Recently changed high pressure pump quantity valve Seems to be better but it’s still not as supposed to be Tomorrow will change crank sensor Thanks for suggestions Found integrated supply control unit which is relay for injectors Tomorrow will change it |
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04-03-2022, 17:14 PM,
Post: #28
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RE: Engine hard to start when is hot
crankshaft sensor replaced and fuel quantity valve
still same problem no idea |
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04-03-2022, 17:24 PM,
Post: #29
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RE: Engine hard to start when is hot
Do you have access to another car with the same engine to look at injection quantity when starting?
Have you looked at the live data of other sensors? Maybe some temperature reading is through the roof? |
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05-03-2022, 06:41 AM,
Post: #30
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RE: Engine hard to start when is hot
(04-03-2022, 17:24 PM)Node Wrote: Do you have access to another car with the same engine to look at injection quantity when starting?I Dont have acces to same car I checked all sensors, done all adaptations what is possible but all is perfect every sensor reading correctly when it testing |
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