I'll try here since I didn't get an answer in the R52 forum.

I have a 2006 R52 that sat for months with a dead battery. When I replaced the battery, the car will crank (turn over), but won't fire. There does not appear to be spark, and there is no smell of fuel from the exhaust. I don't see anything abnormal on the dash. I tried 2 keys with the same result.

How do I know if the immobilizer is keep the car from starting when it cranks?

Anything else I should try?

 

had the same problem with my 06 R52 when I got it home....had to send the EWS module, the ECM, and the key to RPM Motorsports to have the EWS module repaired. I had no spark and no fuel injector pulse....wasn't cheap, but the car started right after I got everything back and installed

Bryan

 

Thanks for the response. That sounds expensive, so I want to make sure it is the immobilizer before I pull parts off and send them away. Was there any indication that the immobilizer was "working" for you? Like a light or sound? And the engine turned over, but wouldn't fire?

 

Read here, all your questions will be answered....but you will need to draw your own conclusions....I had my scanner plugged in and checked some of the live data. I had crank sensor pulse, and cam sensor pulse

https://www.northamericanmotoring.co...ni-or-not.html

Bryan

 

That was quite an adventure you had! I had seen that thread, and the ones pointed to by it. Your symptoms are like mine, but I'm hoping for a way to confirm it is the immobilizer. Maybe I'll call RPM and see if they have suggestions.

 

You can narrow down your issues.
1. Pull one spark plug an see if you have spark.
2. You can either check with a volt meter by pulling one of your injector plug wires an prob it. Then have someone crank the car.

If you have spark an pulse at the injectors then you have other issues.

Had a friend with similar issues. He thought it was his EWS. Turned out his fuel pump was not producing enough fuel pressure for it to start.

You can get inpa along with the cable an realign your EWS to your DME.

 

realign with inpa or ISTA

if you cannot get it to work I sell facelift ecu's recoded with your vin/options and immobilizer removed for 250 $ no need to send me anything other than your vin

 

Before I start buying things, isn't there some way to tell if the immobilizer is working? Amazingly, it seems like not.

If I buy a replacement ECU and it doesn't work, do you take it back?

 

Like I posted
Check for spark an voltage to the injectors. If you have both. Then you EWS is working.

 

it's a very common problem I sell a lot of these to either a: Californians that want to pass emissions and need a stock ecu/tune and to b: people who had immobilizers mess up.

just send it back to me if it does not work, your only out the shipping I'll refund the rest.

 

Forgive me for wanting to be clear. You seem to be saying that there is not a way to tell if the immobilizer is working. I have indications that there is not spark and no fuel. I get the impression that could be from the immobilizer, or from other things like a bad crank sensor, or maybe even a bad fuel pump (no fuel pressure leads to no spark, though that isn't clear). If I had spark or fuel, I would be able to rule out the immobilizer, but I don't seem to have either, though I may need to test more carefully.

 

OK, this is *really* embarrassing, but maybe my report will help some other guy. I got my car running. Yay! But I'm kicking myself because it was a simple 5-amp fuse. I know the first step in troubleshooting is to check the fuses, but I skipped it this time thinking it had to be something else because the car sat for a long time. That was a mistake. Moral of the story: ALWAYS check the fuses first!

THANK YOU to shrevemini for spending non-trivial time helping me load inpa. I'm really sorry I skipped this basic step and caused you to waste time.

 

Hey I’m just glade you got it running.