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Rb25De Unusual Misfire/start Problem (Got Videos)

Memm

By Memm,
in General Maintenance

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Memm

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RB25DE (Non turbo) -

After not starting for a day seems to always start/crank over very slowly and lumpy, after about 3 minutes of trying to start it, it runs but very lumpy and misfires for 5-10 minutes then returns to normal once warmed up to firing on all cylinders... Once started and running it also spits out a bit of water/fuel

Was told it was coil packs - Checked and changed, still does the same

Was told Spark Plugs - Checked and changed, still does the same

Was told Air Flow Meter sending wrong signal if dirty to the ECU - checked and no problem

Was told Fuel lines, if fuel was going into cylinders - Checked lines putting normal amount into fuel rails

Was told head gasket, checked radiator and empty'd the water out just to start it over a couple days without water (to eliminate the fact that it could be sucking in water from radiator, would start normal and fine if it was a head gasket problem with no water, still started lumpy and the same) - Also had plenty of water in radiator, almost full didn't lose any


Was told that it could be faulty injectors, leaking or dripping over night then when started it not running properly due to an ''overflow'' or too much petrol in cylinders hence the lumpy/misfire until that petrol is burnt up.... thought id still post incase anyone knew for sure what it was


Could it be a possible blocked injector problem?

Keep in mind that the problem goes away once warmed up :/

Anyone come across this and know for sure what the problem is??? been bugging me for so long!

Videos of each problem listed below... Although i'm sure they are both related..


Crank over/Start problem -

Running/Misfire problem -


Sorry for long post! really can't figure this one out :/

Memm Contributor

Memm

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Just out of interest, does it help starting if you jump start it with another car?

Haven't tried to jump start with another car, but I have tried using a big jump start battery pack with big leads coming off and it didn't seem to make a difference

Memm Contributor

Memm

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Quick update... took injectors out and had them pulsing through a bath, increasing the speed etc... cleaned and put back in then a day after no start it did the same, one other thing that iv'e been doing to help find out the problem is have the cover that covers the coil packs removed, and while it is running lumpy and misfiring i removed each coil pack plug/loom one by one trying to find out which was misfiring, for example if i removed a plug and it ran worse, then it tells me that the specific coil pack is working, and if it doesn't effect or make the car run work when i remove another plug I know it is THAT specific one/cylinder that isn't working..................... Done that procedure a few times, whenever it ran lumpy or misfired and it isn't a consistent coil pack that isnt working, it will sometimes be the 2nd coil pack, and the 5th then the next day will be the 4th coil pack only or something... seriously out of ideas :/ and I have had the coil packs replaced with different ones by the way.

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