HadeS Posted February 6, 2011 Share Posted February 6, 2011 As in title. I have had problem with overfueling after fitting FCD. I had measured voltage and instead of 4.3 volt I had seen 1.3 I tried to adjust it but with no result so I decided to take if off. After disconnected FCD I tried to start the engine but it doesn't want to fire up. It turning but with no fire. I checked connections from the ecu and there is power going to the injectors but injectors doesn't work? Fuel pomp is working but spark plugs are dry. Does any one had that kind of problem before? Michael. Quote Link to comment Share on other sites More sharing options...
HadeS Posted February 6, 2011 Author Share Posted February 6, 2011 Any one? Quote Link to comment Share on other sites More sharing options...
Scott Posted February 6, 2011 Share Posted February 6, 2011 Have you checked your fuses? Just guessing here but did you forget to disconnect the battery while removing the FCD? If so best case scenario is a fuse, worst case scenario is a fried ECU. Quote Link to comment Share on other sites More sharing options...
HadeS Posted February 6, 2011 Author Share Posted February 6, 2011 F##k had look on fuses but they are ok. And no didn't dissconnected battery, could it really frye the ecu? Quote Link to comment Share on other sites More sharing options...
Scott Posted February 6, 2011 Share Posted February 6, 2011 F##k had look on fuses but they are ok. And no didn't dissconnected battery, could it really frye the ecu? Definitely, you should always disconnect the battery as soon as you touch anything to do with the electronics of the car..... most definitely with regards to the ECU. Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 8, 2011 Share Posted February 8, 2011 I have to say I've unplugged and plugged my ECU with the battery still firmly plumbed in more times than I care to remember, especially when I was diagnosing electrical faults caused by loose connections on the ECU plug! I think they are easily tough enough, it's only 12v and milliamps. An FCD intercepts the airflow signal, are you sure you wired it back up the correct way? Without an airflow signal the ECU would probably throw a fault code, have a look for them. Also, the ECU switches a ground connection to fire the injectors, you should only see a voltage on the injector lines at the ECU when they are being fired. If that's what you are seeing then they are probably working fine but the ECU is fuelling all wrong as it can't see an airflow signal. Quote Link to comment Share on other sites More sharing options...
HadeS Posted February 8, 2011 Author Share Posted February 8, 2011 We have opened ecu and there is little burn. After replacing one part on the ecu, engine had fired up but is stopping after few sec. I'm on the search for the proper bit and it should come back to normal. Sorry for my English I know it's crap Quote Link to comment Share on other sites More sharing options...
HadeS Posted February 21, 2011 Author Share Posted February 21, 2011 Just had the ecu replaced and the car is still not starting. Any thoughts? Quote Link to comment Share on other sites More sharing options...
Scott Posted February 21, 2011 Share Posted February 21, 2011 Did you get a chance to check all of the fuses? Have you checked the spark plugs to make sure they aren't covered in soot (from the lack of starting)? Ignitor pack is ok? You first need to check that you are getting a spark. Remove the EFI fuse (to stop fuel from flooding the engine). Remove one of the coilpacks and one of the spark plugs. Push the plug into the coilpack and plug the coilpack into the harness as it would be in the engine. Rest the top of the plug against a grounded area of the engine (I held it against a bolt) and have someone crank the engine. If you can see a spark, then that shouldn't be the problem. A weak spark can cause issues so make sure it looks good, and if you want to be 100% sure you will need to check all 6 coilpacks and all 6 plugs (Although I have seen my car start on 4 cylinders, sounded like a Suberpoo lol). Next you want to make sure you are getting fuel. Have a sniff at the hole where you took the spark plug out of to get a sense of how strong the fuel smell is. Make sure the plug is dry and put it back in but leave the coilpack etc disconnected. Make sure the EFI fuse is back in place and then crank the engine, just for a second or so. Remove the spark plug and check to see if it is wet with fuel, also have a sniff in the spark plug bore and see if the fuel smell is stronger. Once you have checked the above give us a shout. If you take all the plugs out give the points of them where the spark arcs across a little rub with scotch brite or very fine sand paper to make sure you can get a good spark from them. Also remove any soot from the "V" area directly opposite the tip. Quote Link to comment Share on other sites More sharing options...
HadeS Posted February 21, 2011 Author Share Posted February 21, 2011 Well... I have check spark plugs and they where wet from fuel. I worm them up and clean them. Engine has fired up but after 1sec has stopped. It does try but it's -10 degreas od cels. I'll have a go when wormer days will come. Thanks for tips anyway. Quote Link to comment Share on other sites More sharing options...
HadeS Posted February 21, 2011 Author Share Posted February 21, 2011 The problem is, car is starting normally but after 1 meaby 2 sec is stopping. I'm so frustrated think I'll take her to the garage to sort it out for me. It's not nice to work outside when its -10 degrees. Quote Link to comment Share on other sites More sharing options...
HadeS Posted March 12, 2011 Author Share Posted March 12, 2011 Right, back to the problem. Ecu replaced, spark plugs and injectors inspected. It seems like all 6 cilinders are working but its run very rich and revs only to 5000 rpm, after 4.5 rpm its starts trowing flames like on anti-lag. Diagnostic port dont seems to work so no fault code :/ Any ideas? Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 12, 2011 Share Posted March 12, 2011 Sounds like the ignition timing is off. Check the crank sensor - have a search on here, you'll find a few threads about it failing and what to look for. Quote Link to comment Share on other sites More sharing options...
HadeS Posted March 22, 2011 Author Share Posted March 22, 2011 Right. Cam belt is in the right position. Let's start from begin. Car after 1jz conversion been running spot on. Parts fitted: fcd apex ebc afr After 3-4 weeks car didn't want to start due to overfueling (injectors fail). I have replace stock 380cc injectors to 440 j-specs and remove fcd. Engine has fired up and been running grate for 2-3 months (stock boost), then I decide to put new exhaust and fcd. 3 days later and overfueling came back. Fcd has been removed but somehow I have damage ecu. New ecu but engine running like on anti-lag. My question is. Could it be due to injectors fail (again) but now as they are larger than stock and can overfuel even more and ecu is not able to run engine any better than 5k rpm on neutral and 3k rpm on gear. I hope you will understand what I have post up. Michael Quote Link to comment Share on other sites More sharing options...
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