Homer Posted February 6, 2007 Author Share Posted February 6, 2007 Plugs were my first thought too. It does fire when the plugs are nice and clean, but then slowly dies as the engine floods. I have been driving it with the engine running rather rich (its still on a base map). I changed the plugs after the first issue so these are only a week old, but might just swap them anyway just to eliminate. Quote Link to comment Share on other sites More sharing options...
Pete Posted February 6, 2007 Share Posted February 6, 2007 I'd be careful how much you play. Too much fuel in the chambers whilst turning the engine over a lot will mean poor lubrication. Quote Link to comment Share on other sites More sharing options...
Alex Posted February 6, 2007 Share Posted February 6, 2007 Can I just confirm that it seems that the EMB isn't doing anything? ie it's the same with or without it?? If it was working - even with the sensor up the spout I expect you could see differences in the running by changing the cold start cell. If so it needs to be checked. I assume it works ok so that you can load maps etc and communicate with it? Ok so next what about the harness, have you tried moving the harness whilst the starting it? A bad connection will be shown up usually by playing with it. But as Pete says too much playing can fcuk the engine through bore wash...so be careful. I'd suggest the multimeter needs to come out.... But USE NEW PLUGS with a 1.1mm plug gap for testing. 1.1mm (stock gap) will give you the best cold start gap possible...get yourself 4sets of BKR7E's....for testing. Quote Link to comment Share on other sites More sharing options...
Homer Posted February 6, 2007 Author Share Posted February 6, 2007 Many thanks for the reply Alex Can I just confirm that it seems that the EMB isn't doing anything? ie it's the same with or without it?? I will try again tomorrow, but from the test today it didn't make any difference whether the EMB+harness was in or not. If it was working - even with the sensor up the spout I expect you could see differences in the running by changing the cold start cell. If so it needs to be checked. I changed the cold start with everything from 0 to -50 and it didn't make a difference I assume it works ok so that you can load maps etc and communicate with it? Communication with the unit works fine, I can import and export maps (and have verified the maps are loaded). The data analysis appears to work although I haven't tried it with the engine attempting to idle yet. Will record a log file with it tomorrow provided it still starts. Ok so next what about the harness, have you tried moving the harness whilst the starting it? A bad connection will be shown up usually by playing with it. Yes, tried it this morning for a minute or so and it didn't make any difference. I've checked the connections and they are all very secure But as Pete says too much playing can fcuk the engine through bore wash...so be careful. I'd suggest the multimeter needs to come out.... But USE NEW PLUGS with a 1.1mm plug gap for testing. 1.1mm (stock gap) will give you the best cold start gap possible...get yourself 4sets of BKR7E's....for testing. Bore wash is really concerning me now, especially after the initial issues and massive overfuel. Will be getting another compression test done once it's running again. I'll see if Halfords do a bulk buy tomorrow! The current ones are the 3rd set i've been through since Dec. The current plugs are always at 0.8mm gap so will widen this on the new ones tomorrow. Quote Link to comment Share on other sites More sharing options...
Alex Posted February 6, 2007 Share Posted February 6, 2007 Are you 110% sure of your fuel pressure!? Quote Link to comment Share on other sites More sharing options...
Homer Posted February 6, 2007 Author Share Posted February 6, 2007 Are you 110% sure of your fuel pressure!? After Ian started calling me 'Mr Fuel Pressure', absolutely Checked it at least 4 times today, always around 36psi. Mark @ Phoenix suggested dropping the fp to 28psi, will also try that tomorrow... Quote Link to comment Share on other sites More sharing options...
Alex Posted February 6, 2007 Share Posted February 6, 2007 After Ian started calling me 'Mr Fuel Pressure', absolutely Checked it at least 4 times today, always around 36psi. Mark @ Phoenix suggested dropping the fp to 28psi, will also try that tomorrow... Yeah do that. Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 7, 2007 Share Posted February 7, 2007 Can you datalog your attemps to start it, with clean plugs in, and send me the two log files? Sounds odd that behaviour doesn't change no matter what you do. Also odd that the problem came back spontaneously after a period of faultless running. -Ian Quote Link to comment Share on other sites More sharing options...
Guest s13eater Posted February 7, 2007 Share Posted February 7, 2007 Removed Quote Link to comment Share on other sites More sharing options...
Marty Posted February 7, 2007 Share Posted February 7, 2007 Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted February 7, 2007 Share Posted February 7, 2007 well what do you expect with that bag of shit. Quote Link to comment Share on other sites More sharing options...
imi Posted February 7, 2007 Share Posted February 7, 2007 well what do you expect with that bag of shit. That was out of the blue and just a sweeping statement. Any details as to what you exactly meant and whether you have any justification? If not, then BAN..... Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 7, 2007 Share Posted February 7, 2007 Leave it, don't dilute the thread. S13, you have been warned. -Ian Quote Link to comment Share on other sites More sharing options...
Homer Posted February 7, 2007 Author Share Posted February 7, 2007 Sorted! Changed the plugs and gapped the new ones to 0.8mm, Fuel pressure down to 28psi and it fired up and idles well. I guess it was the plugs all along, maybe the last ones were duds? Ian, do you still want a copy of that log file? Looks like we're okay for Saturday again I can't thank you all enough for your help again Quote Link to comment Share on other sites More sharing options...
imi Posted February 7, 2007 Share Posted February 7, 2007 nice one homer.... keep away from the imodium plugs Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 7, 2007 Share Posted February 7, 2007 Sorted! Changed the plugs and gapped the new ones to 0.8mm, Fuel pressure down to 28psi and it fired up and idles well. I guess it was the plugs all along, maybe the last ones were duds? Ian, do you still want a copy of that log file? Looks like we're okay for Saturday again I can't thank you all enough for your help again You need to try the fuel pressure back to 38psi otherwise it'll be all over the shop and may even be close to running out of duty up top. It'll also make the mapping process longer which isn't what we want Aaaand it will also show that dropping the pressure is masking a problem rather than changing the plugs fixing it If it still works in 6 months time you can start to relax -Ian Quote Link to comment Share on other sites More sharing options...
jaymdee Posted February 7, 2007 Share Posted February 7, 2007 Well done Homer, glad you got it sorted Quote Link to comment Share on other sites More sharing options...
Guest Bijal Posted February 7, 2007 Share Posted February 7, 2007 Sorted! Changed the plugs and gapped the new ones to 0.8mm, Fuel pressure down to 28psi and it fired up and idles well. I guess it was the plugs all along, maybe the last ones were duds? Ian, do you still want a copy of that log file? Looks like we're okay for Saturday again I can't thank you all enough for your help again told you it would be the plugs glad you got it sorted though. it can become frustrating. Quote Link to comment Share on other sites More sharing options...
Homer Posted February 9, 2007 Author Share Posted February 9, 2007 Okay, seems this is not fixed Went out to fill up with petrol today, after returning to the car, it wouldn't start and was doing the same as at the start of this thread (Cranking, occasionally firing but chucking out tons of black smoke). It was running fine on the way to the garage but as always wouldn't hold a steady idle. Checked fuel pressure and dropped it to 28psi which made a slight improvement. Had just bought some brand new plugs so fitted these but made no difference, checked for spark and that is working. So, its not plugs, the map is fine, the fuel pump is working, fuel pressure is good and there is spark. When it does run it backfires and sounds almost as though the timing is out. I'm starting to suspect a wiring/ECU issue now, just can't understand why its so intermittant. Also found out my RAC membership had expired so had to stump up £136 to rejoin and get a truck out. Waited 4 hours for recovery and just got home. Thank god I was on a garage forecourt and they had coffee machine! Quote Link to comment Share on other sites More sharing options...
Wez Posted February 9, 2007 Share Posted February 9, 2007 Sounds like its really really rich. Quote Link to comment Share on other sites More sharing options...
Homer Posted February 9, 2007 Author Share Posted February 9, 2007 Sounds like its really really rich. Yeah, it is. Wonder if an injector or two is getting stuck open. Not to sure where to go from here... Tempted to have it shipped back to Phoenix and let Mark find the problem, only thing is elecronics/euc stuff isn't his strong point. Quote Link to comment Share on other sites More sharing options...
Wez Posted February 9, 2007 Share Posted February 9, 2007 Are all cylinders getting flooded the same? What injectors are you running and are they deff the right impedance? Quote Link to comment Share on other sites More sharing options...
wkdtime Posted February 9, 2007 Share Posted February 9, 2007 Homer im assuming you running an uprated Map Sensor, if so check the wiring and the vac pipes to and from it, make sure there are no kinks in the vac pipes too, also check for the above even if your still using the stock one. Check for kinks or bad vac pipe connections along the Map sensor side of the bay, especially ones that may be T'd with the Map sensor. Quote Link to comment Share on other sites More sharing options...
Wez Posted February 9, 2007 Share Posted February 9, 2007 Would a sticky idle control valve affect fueling intermittantly like this as they have there own air intakes. Quote Link to comment Share on other sites More sharing options...
Homer Posted February 9, 2007 Author Share Posted February 9, 2007 Homer im assuming you running an uprated Map Sensor, if so check the wiring and the vac pipes to and from it, make sure there are no kinks in the vac pipes too, also check for the above even if your still using the stock one. Its using the stock map sensor, I redid all vacuum and boost pipework when I had problems earlier in the week. The log from the EMB shows its receiving the correct voltage from the sensor. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.