miko_supra Posted December 18, 2008 Author Share Posted December 18, 2008 I think that would be very wise, a wideband is also a good diagnosis tool. Any recommendations? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 18, 2008 Share Posted December 18, 2008 I would also put a new O2 sensor in it, as a matter of course. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 18, 2008 Share Posted December 18, 2008 Any recommendations? Yes Innovate LM-1 or LM-2 any day over the competition, as they are both capable of six channel data logging, and are proven to be accurate with good scaling, but the LC-1 is a cheaper option without DL. Quote Link to comment Share on other sites More sharing options...
miko_supra Posted December 18, 2008 Author Share Posted December 18, 2008 Yes Innovate LM-1 or LM-2 any day over the competition, as they are both capable of six channel data logging, and are proven to be accurate with good scaling, but the LC-1 is a cheaper option without DL. This looks like a nice bit of kit... http://www.innovatemotorsports.com/xcart/product.php?productid=16239&cat=0&page=1 Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 18, 2008 Share Posted December 18, 2008 This looks like a nice bit of kit... http://www.innovatemotorsports.com/xcart/product.php?productid=16239&cat=0&page=1 Yes they are, coupled with the Logworks software, turns it into a very useful tuning tool, the LC-1 + kit seems to give the same functionality as LM-1 don't know about price difference. Quote Link to comment Share on other sites More sharing options...
miko_supra Posted December 26, 2008 Author Share Posted December 26, 2008 Just changed the O2 sensor, but still no joy Quote Link to comment Share on other sites More sharing options...
Steve Posted December 26, 2008 Share Posted December 26, 2008 I would be trying some new coil packs. Ideally a known working set. Quote Link to comment Share on other sites More sharing options...
miko_supra Posted December 26, 2008 Author Share Posted December 26, 2008 Im going to inspect the cam and crank position sensors next for there conditon and resistance as this will cost nothing Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted December 26, 2008 Share Posted December 26, 2008 When you changed the coil pack connectors did you close up the connectors on the pins. 9/10 this is the problem i find with missfires. Ryan Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted December 26, 2008 Share Posted December 26, 2008 Other bits to check: Is the Ignitor grounded well? Check with a multimeter When the missfire happens does the rev counter go abit crazy i.e jump around 1k as this normally points at a Crank sensor issue. My bet is on the coil pack pins though. Quote Link to comment Share on other sites More sharing options...
miko_supra Posted December 26, 2008 Author Share Posted December 26, 2008 Other bits to check: Is the Ignitor grounded well? Check with a multimeter When the missfire happens does the rev counter go abit crazy i.e jump around 1k as this normally points at a Crank sensor issue. My bet is on the coil pack pins though. The car revs through fine, it just feels under powered and you can hear the engine running badly out of the exhaust, it's very rapid, sounds like its farting. When i look at the boost gauge it is peaking at about 13 psi (usually 18psi) and the needle is juddering between 12 and 13psi. The car will go all the way to the top of the revs also. I started up the car a moment ago and using a dentist mirror i checked the coil packs to see if they were arcing at all. When i changed the clips i also adjusted the little flap of metal in the connectors to get a better contact too. I'm going to get the multimeter out tomorrow and start checking earths and the resistances on all coil packs as well as sensors. Quote Link to comment Share on other sites More sharing options...
miko_supra Posted December 31, 2008 Author Share Posted December 31, 2008 I have just done a compression test on the engine... (PSI) 1)191 2)185 3)188 4)191 5)190 6)162 Thats 15% difference between cylinder 1 I tested the 6th cylinder with some oil in it and i got 227.8psi. Tested number 1 cylinder with the same and i got 250psi. Which now equals an 8% difference. I did a boroscope on the cylinders before xmas and the valves all look fine. Im going to take it to a garage next week to get a leak down test done. Quote Link to comment Share on other sites More sharing options...
miko_supra Posted December 31, 2008 Author Share Posted December 31, 2008 I have just done a compression test on the engine... (PSI) 1)191 2)185 3)188 4)191 5)190 6)162 Thats 15% difference between cylinder 1 I tested the 6th cylinder with some oil in it and i got 227.8psi. Tested number 1 cylinder with the same and i got 250psi. Which now equals an 8% difference. I did a boroscope on the cylinders before xmas and the valves all look fine. Im going to take it to a garage next week to get a leak down test done. After speaking to a few friends it seems that this wont be the cause of a misfire, although i am going to investigate it some more. When my new multimeter arrives im gonna do some more checks for the misfire Quote Link to comment Share on other sites More sharing options...
miko_supra Posted January 19, 2009 Author Share Posted January 19, 2009 YES YES YES YES YES!!!!! It's fixed hoorah! i've had a enjoyfull morning of loosing traction at 70mph on those greasy roads. She boosts fine now all the way up to 1.2 Bar without missing a beat Ok what i did... I inspected the coil packs again, checked their resistances and they were all covered in tiny cracks so i filled the cracks with araldite, let it dry and then smeared an electrical insulating gel around the stem of the packs. Problem fixed! the sparks must have been shorting onto the block due to the cracks. I had checked at night time before to see if i could see any sparks but could not. But oh well she drives nicely now Quote Link to comment Share on other sites More sharing options...
rick001 Posted January 19, 2009 Share Posted January 19, 2009 Well done mate chuffed for ya Its 'good to know' info in case i/we encounter the same issue Quote Link to comment Share on other sites More sharing options...
Chrisbeast Posted January 19, 2009 Share Posted January 19, 2009 YES YES YES YES YES!!!!! It's fixed hoorah! i've had a enjoyfull morning of loosing traction at 70mph on those greasy roads. She boosts fine now all the way up to 1.2 Bar without missing a beat Ok what i did... I inspected the coil packs again, checked their resistances and they were all covered in tiny cracks so i filled the cracks with araldite, let it dry and then smeared an electrical insulating gel around the stem of the packs. Problem fixed! the sparks must have been shorting onto the block due to the cracks. I had checked at night time before to see if i could see any sparks but could not. But oh well she drives nicely now Nice 1! Good find that. Quote Link to comment Share on other sites More sharing options...
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