T2 MSW Posted September 24, 2008 Share Posted September 24, 2008 Been down to Whifbitz today to get my front wheel bearings replaced - guys have done a great job and im very impressed However on the way home I came across a slight issue with boost. Cant quite get my head round it and I need to look into it tomorrow. Just looking for sugestions at the minute. The problem - On WOT on high boost (1.2 bar) the car feels like its cutting. Its exactly like the RLTC hard cut ever second but I dont think its the RLTC as ive turned it off. Im not saying its not as ive not got it on the laptop yet to check its not cutting. However if I turn the boost controller off so its back to almost stock boost then its all fine at 0.9 -1.0 bar. Tomorrow im going to get the lappy plugged into the RLTC and record a high boost run just incase disturbing the front ABS sensors. Also going to check all the presure lines going to the turbos and Boost controller. Anything else I can check? p.s also well happy tonight as my turbo and manifold turned up - cheers Jay Quote Link to comment Share on other sites More sharing options...
DamanC Posted September 24, 2008 Share Posted September 24, 2008 Perhaps a missfire. Have you checked your plugs/coil pack clips? Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted September 24, 2008 Author Share Posted September 24, 2008 Ill check that tomorrow but i would have expected a missfire to be less precise? Quote Link to comment Share on other sites More sharing options...
Nic Posted September 25, 2008 Share Posted September 25, 2008 Misfire at high boost I would suspect plugs too. Quote Link to comment Share on other sites More sharing options...
Pig Posted September 25, 2008 Share Posted September 25, 2008 I had a very similar issue which turned out to be plugs. I had thrown a tip. I thought it was RLTC too. Easy enough to tell if its RLTC - turn it off. Then hey presto. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted September 25, 2008 Author Share Posted September 25, 2008 Cheers Guys, just not what i expected if its plugs. Going to take the plugs out over the weekend and have a look. May get the IK24's this week just in case. Wish i had know of this issue when i was at whifbitz i could have saved on some postage Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted October 12, 2008 Author Share Posted October 12, 2008 Right ok, getting depressed with this now. Changed all the plugs before the track day and then the coil pack clips at the track day (thanks to CW, who I still owe the money to for those!?) on the track day it looked like that sorted it but I only ran 1 lap on high boost before the brakes let me down. So Ive changed the plugs and all the coil pack connectors and its still miss fireing or holding back at 1.2 bar. I have noticed that when the miss fire occurs there is an odd noise coming from the back of the car. Its possible its just the note from the exhaust when it cuts but to me it sounds like the fuel pump. Does anyone have any advise on this issue as im running out of ideas besides just throwing £80 at a fuel pump and hoping it works before next weekend. The fuel pump was replaced at the back end of last year when I went BPU but it is quite noisey - more noisey recently but im not sure if its just me trying to convince myself thats the fault. The next problem is im in london all week so not going to get chance to either look at the car or get it to someone that can. Got a feeling next week is off before I have even got there Any ideas anyone? Quote Link to comment Share on other sites More sharing options...
Branners Posted October 12, 2008 Share Posted October 12, 2008 Have you had the fuel filter checked. If that builds up enough gunk it will reduce the flow and also make the pump work harder. If its never been changed during your ownership get it looked at. Its a bit fiddly though so make sure who ever is going to look at it actually does. I have heard of cars coming back with a new fuel filter when none was fitted. JB Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted October 12, 2008 Author Share Posted October 12, 2008 It is something I had considered, and it was meant to have been changed before I got the car but I doubt it actually was. Is the fuel filter a job that can be done without the tank being drained? I assume its just the same as the pump and the lines need fuel taking out of them before? Going to struggle to get it looked at this week though so that leaves me with friday night and sat at the pod. Quote Link to comment Share on other sites More sharing options...
Pete Posted October 12, 2008 Share Posted October 12, 2008 Is the fuel filter a job that can be done without the tank being drained? I believe so, however I'm told they can sometimes be a PITA to get off if the nuts have seized or something if I remember correctly? Only docs I can find in the download section so far say "Relieve fuel system pressure prior to servicing any fuel system component" Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted October 12, 2008 Author Share Posted October 12, 2008 Cheers for the info Pete. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted October 12, 2008 Author Share Posted October 12, 2008 Going to try and get the fuel filter changed this week if I can get the parts delivered Quote Link to comment Share on other sites More sharing options...
Homer Posted October 12, 2008 Share Posted October 12, 2008 As has been mentioned the only problem you can get with the fuel filter is if the nut on the fuel supply line from the tank has been over tightened. It can spread the flange so much that it's impossible to undo. However thats not the end of the world as the line can can be swapped easily, it's about £20 from Toyota and usually available within 2-3 days. Quote Link to comment Share on other sites More sharing options...
b_have Posted October 12, 2008 Share Posted October 12, 2008 If you have a Walbro, check the sock filter. I've replaced mine twice over the years. Symptoms are noisy pump and high load missfire. Quote Link to comment Share on other sites More sharing options...
GazB Posted October 12, 2008 Share Posted October 12, 2008 Hi Mike haven't read all the tread but could it be overfueling when underload. Do it smell like it's running rich? Is you fuel consumption high? My was running rich and missfiring at high boost, leaned it off a bit and runs good again, better mpg and it doesn't stink the place out when if fire it up Mine also misses if put underload without being at a good running temp. Hope you get it sorted before Saturday Gaz Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted October 13, 2008 Author Share Posted October 13, 2008 If you have a Walbro' date=' check the sock filter. I've replaced mine twice over the years. Symptoms are noisy pump and high load missfire.[/quote'] can you get the socks on their own? Hi Mike haven't read all the tread but could it be overfueling when underload. Do it smell like it's running rich? Is you fuel consumption high? My was running rich and missfiring at high boost, leaned it off a bit and runs good again, better mpg and it doesn't stink the place out when if fire it up Mine also misses if put underload without being at a good running temp. Hope you get it sorted before Saturday Gaz Cheers Gaz Its not smelling like its over fueling no not even from behind the car. Fuel consumption has not been noticable and its just strange how it started all of a sudden. Quote Link to comment Share on other sites More sharing options...
GazB Posted October 13, 2008 Share Posted October 13, 2008 Sorry Mike if it was no help. My overfuel occured as the map has been tweeked during the year Are you still going to Suprapod Saturday? I can hear my fuel pump making noises now seats etc. have been removed, you could have a listen and see if it's sounds the same. I know my pump working ok as it can supply over fuel if required It may help? Gaz Quote Link to comment Share on other sites More sharing options...
b_have Posted October 13, 2008 Share Posted October 13, 2008 can you get the socks on their own? . http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=270157196447 Quote Link to comment Share on other sites More sharing options...
miko_supra Posted October 13, 2008 Share Posted October 13, 2008 Try changing your coil packs- I had a missfire at high boost, changed the clips and the plugs with no change, bought some tried and tested coil packs and it runs fine now. The missfire wasn't violent and i could accelerate through it. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted October 13, 2008 Author Share Posted October 13, 2008 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=270157196447 Cheers, purchased. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted October 13, 2008 Author Share Posted October 13, 2008 Is there any way to test the coil packs? I dont want to go throwing money at them if thats not the issue - especially considering they are £100 each Quote Link to comment Share on other sites More sharing options...
miko_supra Posted October 13, 2008 Share Posted October 13, 2008 Is there any way to test the coil packs? I dont want to go throwing money at them if thats not the issue - especially considering they are £100 each Whifbitz supply them for £55 each and you can get a second hand set for around £70-100 (thats what i bought.) Not sure about testing though Quote Link to comment Share on other sites More sharing options...
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