Steve Posted July 2, 2006 Author Share Posted July 2, 2006 Is it just the heat? Really hot intake charge? That wouldnt affect the idle though would it? Quote Link to comment Share on other sites More sharing options...
bondango Posted July 3, 2006 Share Posted July 3, 2006 May just try fitting a Aeromotive then as was gonna fit it when i go single. With the emanage, i have checked the files and they are the same as they have always been. Have already checked and cleaned all the injector clips. Thanks for your input, if you think of anything else please let me know. What wideband do you use? with the LM1 we do a free air recalibration for each car, maybe the wideband your using just needs recalibrated Quote Link to comment Share on other sites More sharing options...
Ian C Posted July 3, 2006 Share Posted July 3, 2006 It's an AEM one with the etched resistor calibration. I appreciate your concerns about running it while it's going lean, very sensible and I wouldn't advise actually driving it anywhere - but the tests I've sent you are while stationary in neutral, you shouldn't see boost, it'll be perfectly OK to do Mainly I want to see the injectory duty response when you accelerate, and see what AFRs you get in and out of closed loop. Plus the logs will prove other things are working or not, like the throttle position sensor or the stock MAP sensor. It'll at least rule things out. -Ian Quote Link to comment Share on other sites More sharing options...
Steve Posted July 3, 2006 Author Share Posted July 3, 2006 It's an AEM one with the etched resistor calibration. I appreciate your concerns about running it while it's going lean, very sensible and I wouldn't advise actually driving it anywhere - but the tests I've sent you are while stationary in neutral, you shouldn't see boost, it'll be perfectly OK to do Mainly I want to see the injectory duty response when you accelerate, and see what AFRs you get in and out of closed loop. Plus the logs will prove other things are working or not, like the throttle position sensor or the stock MAP sensor. It'll at least rule things out. -Ian Will do it tonight Ian, thanks Quote Link to comment Share on other sites More sharing options...
Steve Posted July 3, 2006 Author Share Posted July 3, 2006 Ian have emailed you with the logs from the tests you asked me to do. Thanks mate Quote Link to comment Share on other sites More sharing options...
bondango Posted July 24, 2006 Share Posted July 24, 2006 Any update on this? did you get sorted? Quote Link to comment Share on other sites More sharing options...
Steve Posted July 24, 2006 Author Share Posted July 24, 2006 Well i changed the FPR and it seemed to start running ok, but it has now gone back to how it was. I spoke to Matt Harwood over the weekend at JAE and he has suggested i check all the vac pipes that come off the intake plenum. So will change all of these and let you know what happens. Quote Link to comment Share on other sites More sharing options...
bondango Posted July 24, 2006 Share Posted July 24, 2006 Steve we had a similar problem last night, the car was seeing 15-16's at idle and around 14-15 cruising, 1st turbo was seeing mid to high 13's and finally went to low 11's on full boost. Removed the IAC valve and it was well gunked up, cleaned it out and check and cleaned all connectors, reset ecu and it seemed to run dead on. Maybe worth checking?? Marty Quote Link to comment Share on other sites More sharing options...
Steve Posted July 25, 2006 Author Share Posted July 25, 2006 Steve we had a similar problem last night, the car was seeing 15-16's at idle and around 14-15 cruising, 1st turbo was seeing mid to high 13's and finally went to low 11's on full boost. Removed the IAC valve and it was well gunked up, cleaned it out and check and cleaned all connectors, reset ecu and it seemed to run dead on. Maybe worth checking?? Marty Sounds exactly like mine Marty. Will have a look at the IAC valve. What did you clean it with? Thanks Quote Link to comment Share on other sites More sharing options...
gaz1 Posted July 25, 2006 Share Posted July 25, 2006 oopps Quote Link to comment Share on other sites More sharing options...
gaz1 Posted July 25, 2006 Share Posted July 25, 2006 sorry fecked that up:( Quote Link to comment Share on other sites More sharing options...
bondango Posted July 25, 2006 Share Posted July 25, 2006 Used Carb Cleaner, here a good link to do it right (not 2J but same IAC) http://planetsoarer.com/IAC/iac.htm you can also do the full tests on it if you want.. http://www.supras-ireland.net/manuals/Workshop%20Manuals/Supra%20MK4/03%20-%20Engine%20&%20Turbocharger/System%20component%20tests%20-%20Turbo.pdf Starts page 30 Quote Link to comment Share on other sites More sharing options...
Steve Posted July 26, 2006 Author Share Posted July 26, 2006 I took the IAC Valve off and took it apart. I found that the plastic shaft bit inside is broken (the stop at the end). So am gonna try and source one from somewhere and let you know what happens. Quote Link to comment Share on other sites More sharing options...
Paul_SWZ Posted July 26, 2006 Share Posted July 26, 2006 Once the fuel pressure is reached the pump should stop trying to prime. perhaps your fuel regulator is leaking fuel back into the tank. Quote Link to comment Share on other sites More sharing options...
Steve Posted July 31, 2006 Author Share Posted July 31, 2006 Any more ideas people. Have been through all the VAC hoses (changed one that split), have changed the IAC Valve, still runs lean. Quote Link to comment Share on other sites More sharing options...
Lucifer Posted July 31, 2006 Share Posted July 31, 2006 Get it down to us adn well ahve it done in no time! Quote Link to comment Share on other sites More sharing options...
bondango Posted July 31, 2006 Share Posted July 31, 2006 just trying to go through a few things in my head...Bad injector or injector clip/wiring, bad emanage wiring. If Japspec maybe blocked of faulty MAP sensor. TPS outta whack...tis a hard one this lol. Did ian get a chance to look at your emanage logs? Quote Link to comment Share on other sites More sharing options...
Ian C Posted July 31, 2006 Share Posted July 31, 2006 Yeah I did, I can't explain it from the logs. The duty cycles are correct for idling on 650's, in fact they may be a little high - 2.4 to 2.5msec at around 650rpm. And yet the AFRs sit at 15.5 to 16:1. Revving it to 2500rpm gives 17.5:1's Then it fluctuates between 16:1 and 14:1. It's bizarre. I'd say it's low fuel pressure, perhaps the fuel filter has got something wedged in it? You could try running the fuel system off the diagnostics port and increasing the fuel pressure - see if the pump note changes, it should go up as you increase the pressure because the pump works harder... If there is a blockage in the system before the injectors it should stay the same until the FPR is a greater restriction. -Ian Quote Link to comment Share on other sites More sharing options...
bondango Posted July 31, 2006 Share Posted July 31, 2006 steve whats your fuel pressure at idle? or you not running an AFPR?? Quote Link to comment Share on other sites More sharing options...
Steve Posted August 2, 2006 Author Share Posted August 2, 2006 steve whats your fuel pressure at idle? or you not running an AFPR?? Static fuel pressure (vac hose off) is 36psi, if you let it tickover with the vac hose on the pressure sits around 31 psi. If you rev it the pressure does increase slightly. Martin, thanks for the offer but i dont wanna drive it all the way to Bristol running lean like it is. Quote Link to comment Share on other sites More sharing options...
bondango Posted August 2, 2006 Share Posted August 2, 2006 Steve im starting to think this could be an injector at fault. even thought the emanage is showing correct Duty readings, you could have a blocked or faulty injector or bad injector clip/wiring. Youve done everything else possible that i can imagine. Closed loop uses the o2 sensor for fueling but usually you run pig rich if theres a fault there.... Quote Link to comment Share on other sites More sharing options...
Steve Posted August 2, 2006 Author Share Posted August 2, 2006 Steve im starting to think this could be an injector at fault. even thought the emanage is showing correct Duty readings, you could have a blocked or faulty injector or bad injector clip/wiring. Youve done everything else possible that i can imagine. Closed loop uses the o2 sensor for fueling but usually you run pig rich if theres a fault there.... Cant see how it can be a injector fault. All the spark plugs are white, so all the cylinders arer running lean so must be something else. Quote Link to comment Share on other sites More sharing options...
bondango Posted August 2, 2006 Share Posted August 2, 2006 Didnt know you had checked the plugs :-) ...away for a think... Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted August 2, 2006 Share Posted August 2, 2006 Faulty ECU coolant temp sensor or air temp sensors can cause this sort of problem but it usually results in rich AFRs, but worth a check. Quote Link to comment Share on other sites More sharing options...
Steve Posted August 5, 2006 Author Share Posted August 5, 2006 Just bumping incase anyone has anymore ideas. Quote Link to comment Share on other sites More sharing options...
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