Engine Won't Start

[gunjack]

Hi

I replaced the head on my nephews car after the head was destroyed by really bad detonation.Once the engine was back together it started and ran fine for a short period then it stopped and has refused to start again since.

I have cranked the engine over with the spark plugs out and the spark seems to be very weak, mostly a white to yellow colour, and somtimes its more of a mist looking then a actual spark.

I know to test the series 1 coils for a value between .6 and .9 ohms but what do you test the series 2 for, as they have the built in ignitor?

Does anyone know what values to test the ignition coils for on a series 2 RB25DET?

thanks for any help

[blind_elk]

You have a good strong battery?

You have compression? (horrid thought - lots of bent valves!)

[Duncan]

When you replaced the head did you replace the rings as well?

[gunjack]

When you replaced the head did you replace the rings as well?

<{POST_SNAPBACK}>

Duncan

No the rings were not replaced during the procedure

Cheers Gunjack

[gunjack]

You have a good strong battery?

You have compression? (horrid thought - lots of bent valves!)

<{POST_SNAPBACK}>

blind_elk

Battery is in a charged condition and have compression in all cylinders

Cheers Gunjack

[Duncan]

OK I guess my real question is, were the rings OK when you put the new head on? are you sure? because generally the rings or ring lands are what are really damaged by detonation, it seems unusual to change the head but leave the bottom end alone with a problem like this.

did you ever get to check the compression after the new head? was it OK then?

[gunjack]

OK I guess my real question is, were the rings OK when you put the new head on? are you sure? because generally the rings or ring lands are what are really damaged by detonation, it seems unusual to change the head but leave the bottom end alone with a problem like this.

did you ever get to check the compression after the new head? was it OK then?

<{POST_SNAPBACK}>

Thanks Duncan

I'll do a reading and check the actual figures,but what gets me, is that after the rebuild, the car started and ran fine, so I'm not sure if its related to the rebuild or just something else that has decided to fail.Unfortunately the rings didn't occur to me at all when it blew its gasket.

I'll let you know when I have some figures.

Thanks again

[AD4M]

have you checked that the fuel lines are running into the fuel rail the right way??

when we replaced my rb20 it did a similiar thing and it was because we had the fuel pumping onto the presure reg instead of through it.

just an idea

good luck

Adam

[blind_elk]

I checked the coils on my RB25DET. Between pins IB and G, I got approx 1.4 ohms. There is no continuity on any other pin combination.

[gunjack]

I checked the coils on my RB25DET. Between pins IB and G, I got approx 1.4 ohms. There is no continuity on any other pin combination.

<{POST_SNAPBACK}>

Thanks for the info blind_elk

I'll compare mine to see if they are not too far off yours.

[gunjack]

have you checked that the fuel lines are running into the fuel rail the right way??

when we replaced my rb20 it did a similiar thing and it was because we had the fuel pumping onto the presure reg instead of through it.

just an idea

good luck

Adam

<{POST_SNAPBACK}>

Yeah ,I doubled checked to day, I even pulled the injectors out to check and found that all 6 injectors fire simultaneously on all strokes, Just started another thread requesting info on how they are supposed to work ,as I would think that would flood the engine .

thanks for the idea though