What Did You Do To Your Car Today.


scout01
 Share

Recommended Posts

Immobilizer on M4.4 cars allows the engine to start but shuts it down after 2 seconds. ME7 AFAIK doesn't start either fuel pump or ignition system unless key is recognized. Maybe it helps you with the diagnostics.

When changing the camshaft sensor, did you buy a new one or used a second-hand one ? Same with the RPM sensor...

Crankshaft and camshaft sensors are the only ones that dictate spark timing. If those are ok, maybe your ECU is fried :(

Have you checked ALL the ground points, as per the wiring diagrams ? Maybe ECU isn't getting power upon cranking ?

A friend of mine had a short in the starter motor, and when cranking, the voltage dropped so low that ECU wasn't able to start. On a good battery, voltage shouldn't drop lower than 9V (IIRC) when cranking

Does it start if towed/bump started, at the moments it doesn't start cranked ?

Edited by Midnight Caller
  • Upvote 1
Link to comment
Share on other sites

I'm getting full power at the fuel pump when cranking, so based on that I don't believe it is an immobilizer issue.

The cam sensor I installed was from my parts car, which I've never seen run so I can't conclusively say the sensor was good when it was installed. Crank sensor was brand new when installed.

All grounds are in good condition - I previously found some fraying on a cam cover ground strap, so that was replaced with one in better condition. I'm gonna hazard a guess and say my ECU isn't fried, as the car has started and ran normally 2x since this issue appeared.

Link to comment
Share on other sites

Thinking back to when I was troubleshooting the no start condition on my 2000 R post manual swap. It was an IMMO issue. I think the fuel pump still received voltage as I had pressure at the rail, it was that the ECU was not pulsing the injectors. I physically unbolted the fuel rail and pulled it off the intake manifold while someone cranked it and no fuel was coming out. I had spark.

Even if you get this resolved quickly, I still would grab a dice unit since you have a 99. It really helps narrow things down in situations like this.

Did you try jumpering the starter relay as suggested?

I seem to recall there being a bulletin about the connections at the IMMO under the dash. Might be worth a try pulling it down from under the steering column and reseating the connector.

Edited by BlackT5
  • Upvote 2
Link to comment
Share on other sites

Midnight caller, as was stated above, the car is a stock 99 V70 R with an automatic transmission.

I definitely plan on buying a VIDA/DICE setup in the near future - just trying to stick to my budget and this problem isn't helping :lol: I did re-seat the immobilizer connections, and it didn't make a difference. I don't have spark, but I will pull the rail and verify the injectors are still firing and not being interrupted by the immobilizer. I haven't jumped the starter relay yet - I forgot about Howard's advice to try that when I was at the shop last night, so I will give that a shot next time I'm there.

On a related note, I really appreciate everyone's help here :)

Link to comment
Share on other sites

Sorry for not noticing the gearbox detail, I got lost through the topic.

Siemens EMS on S40/V40 didn't even let you crank if IMMO didn't recognize the key, and a car with an "X" on it pulsed in the dash.

M4.4 lets you start, but shuts off the engine immediately.

I guess ME7 is somethere in between.

A DiCE can be bought off eBay at around 150USD, so it's not that expensive. I had to buy a 500$ VST (couldn't be done without the help of a very kind friend in USA) just to recalibrate my damper motors, so I feel you regarding the budget part :)

Link to comment
Share on other sites

Sorry for not noticing the gearbox detail, I got lost through the topic.

Siemens EMS on S40/V40 didn't even let you crank if IMMO didn't recognize the key, and a car with an "X" on it pulsed in the dash.

M4.4 lets you start, but shuts off the engine immediately.

I guess ME7 is somethere in between.

Bunch of completely different systems with different behaviours. Can't compare them.

Wasn't it ~1000$ by the time it had passed customs?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share