2011 6cyl: No Start (turns over) (edited)

carboncow · Post by **carboncow** » 04 Sep 2018, 11:10

jimmy57 wrote: 04 Sep 2018, 11:06 Do that anyway as fault detection by the modules is not perfect or 100% reliable. I would verify that it has no spark. If it has spark and smells like raw fuel something else could be wrong.

Understood. I've seen bad ones not register codes before.

Is there a best practice for looking for spark. I know in the old days you could just hold up the plug to ground but I'm seeing posts/videos about damage to coil.

carboncow · Post by **carboncow** » 04 Sep 2018, 19:33

UPDATE:

OK, we found that fuse #10 was nuked in the box under the hood. This was for ignition/ecu. Took all the leads of direct ignition modules and one by one put them on until we found the one nuking the fuse. It was the DIM closest to to the drivers side. Local AutoZone had a Duralast unit for $50.00

Would still not start!

Pulled all plugs and they look original (FoMoCo) and the XC90 had 130K miles...they are rough but I've seen worse. Between those plugs and all the fuel we may have dumped in it...I'm going to let it sit open to dry out and get new plugs in AM.

Any other thoughts on what could have gone bad the same time the DI module went?

Vida has NO errors at all showing still!

Post by **jimmy57** » 04 Sep 2018, 20:30

Yes, you can check for spark by putting a spark plug into coil boot and then laying the plug threads on head or other engine metal for ground and then cranking it over a few revs. Since it is individual coils the spark will seem infrequent if you check just one. Did you try cranking with it floored? If it's flooded it might be reluctant to go.

carboncow · Post by **carboncow** » 04 Sep 2018, 20:51

jimmy57 wrote: 04 Sep 2018, 20:30 Yes, you can check for spark by putting a spark plug into coil boot and then laying the plug threads on head or other engine metal for ground and then cranking it over a few revs. Since it is individual coils the spark will seem infrequent if you check just one. Did you try cranking with it floored? If it's flooded it might be reluctant to go.

Thanks. That test makes sense...I've just seen a lot of guys claim one can damage the direct ignition module this way...but I have always been skeptical.

I'm sure he pumped the gas a few times with the 50+ starts we've tried over the last 48 hours. Don't think it was floored but the smell of gas was moderate when the plugs were out...we'll have the plugs all open for the night, should solve that issue.

Update in the AM with new iridium plugs in it!

Post by **RickHaleParker** » 04 Sep 2018, 20:58

I recently changed a jumped timing belts on a 1.9L. After the belt change it would not start. Disconnected the camshaft postition sensor, it took a extended crank but eventually the ECM got it started using the lookup tables. After that it starts right up with the CPS connected.

You might try disconnecting the CPS or MAF and force the ECM to rethink. The ECM has some AI code in it, sometimes you got to play with it's mind to get it out of a mind set. A virtual bop on the head.

carboncow · Post by **carboncow** » 04 Sep 2018, 21:06

RickHaleParker wrote: 04 Sep 2018, 20:58 I recently changed a jumped timing belts on a 1.9L. After the belt change it would not start. Disconnected the camshaft postition sensor, it took a extended crank but eventually the ECM got it started using the lookup tables. After that it starts right up with the CPS connected.

You might try disconnecting the CPS or MAF and force the ECM to rethink. The ECM has some AI code in it, sometimes you got to play with it's mind to get it out of a mind set.

Thanks for the input...I don't doubt this at all. I think from my reading (and theories) doing a battery disconnect and touching the +/- to dissipate any residual power in modules would have a similar effect. Will consider it all as it sure seems like it may have "stored" some type of concern...just surprised Vida doesn't log anything at this point! I've had many a Volvo with bad direct ignition modules not leave a single code in Vida, so not surprised this time. But just scratching head on what it still could be in light of the found bad coil.

Plugs in the AM will make or break the next step!

daveybeee · Post by **daveybeee** » 19 Sep 2025, 11:54

Smoked coil will blow a fuse. Check the fuse for the ignition coils in the main panel under the hood. I know this is way late but may be of value to others in the future.

Vova585 · Post by **Vova585** » 19 Sep 2025, 15:49

Sorry, I disagree with diagnosis sequence.
Great you verified fuel pressure and it "smells like gas" so fuel is there. You didn't mentioned that it sounds like no compression, so hopefully it is there.
Now I would verify if there is spark on 1-2 coils. If no spark i would find myself a wiring diagram from alldata diy and verify i have power, ground on corresponding wires(with load test light not multimeter). Then fix what is missing. If both are there and no spark- you sure can disconnect coils and try to erase codes and with connecting 1 coils at a time after 2 coils you will know if your issue is with coils or not. If no spark after that- you have problem with ecu or inputs.

Capndirk · Post by **Capndirk** » 20 Sep 2025, 11:44

I have no logical basis to suggest this, but it's the first thing that came to mind as I read this thread; replace the fuel pressure sensor. Call it long distance ESP. The mileage and age is good for this call, so I would definitely eliminate it. I've read in too many threads where the thing hasn't coded and caused problems. Who knows, maybe the fuel pressure and smell means a flooded engine, like the old days. There's a reason that genuine Bosch sensors are only $40 +/-. Parts have to pay rent for sitting on the shelf too long.

Post by **abscate** » 21 Sep 2025, 04:43

Mod note - creaky7year old thread resurrection.