Suprasteve Posted November 4, 2007 Share Posted November 4, 2007 The SMIC would cause that problem would? No don't think so, if the SMIC was old and knackered then it would affect the boost and performance would reduced as the turbos got hotter and hotter. From cold the car would perform fine especially in the cold weather. Also I really don't think a knackered SMIC would cause the car to "start shaking and juddering and doesnt go past 5k" this definately sounds for like a miss fire, fuel and or Electrical problem to me. but then what do i know ? just my 2ps worth Quote Link to comment Share on other sites More sharing options...
Suprasteve Posted November 4, 2007 Share Posted November 4, 2007 Still using the SMIC so not full bpu . Theres an ongoing argument stating that the original Toyota SMIC is perfectly sufficent (assuming in good condition) for a BPU car and no performance is gained by fitting a FMIC. So you could say you are fully BPU. Quote Link to comment Share on other sites More sharing options...
supra_surj Posted November 4, 2007 Author Share Posted November 4, 2007 Steve ive got platinum plugs. Are they any good and when i go bpu do you think they will be ok? Surj Quote Link to comment Share on other sites More sharing options...
Suprasteve Posted November 4, 2007 Share Posted November 4, 2007 Steve ive got platinum plugs. Are they any good and when i go bpu do you think they will be ok? Surj depends on which type they are. They generally will be different from when the car is running less boost. Refer to Alex's thread on Spark Plugs for some options... http://www.mkivsupra.net/vbb/showthread.php?t=41927 Quote Link to comment Share on other sites More sharing options...
Cass Posted November 4, 2007 Share Posted November 4, 2007 Tried a few things today,one of which put a smile on my face I temporarily changed the vac hoses cutting out the VSV's so the car was set up in TTC mode and went for a bit of a drive. Resulting in that both turbo's boosted fine at 4000 rpm back to 1.2 bar and the car didn't shake or splutter. I'm going to place an order at Mr.T for some new VSV's. Quote Link to comment Share on other sites More sharing options...
imi Posted November 4, 2007 Share Posted November 4, 2007 sounds like a spark / injection related issue.... I have something similar a couple of years back, it was a dodgy injector connector, changed all six of them (plastic connectors) Quote Link to comment Share on other sites More sharing options...
Sean1933 Posted November 4, 2007 Share Posted November 4, 2007 As previously stated, it sounds electrical and missfire related. However i would start with running in TTC mode (ie bypass the VSV's) just to rule them out. Obviously check for error codes too. If that doesnt work then replace the spark plugs with NGK BKR7E's, only cost £13 for all 6 from a motor factors. They wont last as long as platinums but i prefer them and just change them when i change the oil. Then check sub TPS sensor, spark plug/injector connectors, gearbox sensor, etc...its not fun finding the source of a problem. If you could get a video of it running so we can hear the engine it may help. Quote Link to comment Share on other sites More sharing options...
supra_surj Posted November 4, 2007 Author Share Posted November 4, 2007 Brilliant thanks guys. Ive got alot to check so will get that done during the week and let you know the results. Quote Link to comment Share on other sites More sharing options...
Cass Posted November 4, 2007 Share Posted November 4, 2007 I was checking my coil pack connectors yesterday and kind of broke the plastic bit round a pin,the bit the white bit clips to and now i get a funny noise from my turbo when it spools up and 2nd Turbo hardly comes on. But when i went to TTC mode today all was fine,so im going to MR.T for new coil pack connectors and vsv's. Quote Link to comment Share on other sites More sharing options...
tucky40 Posted November 4, 2007 Share Posted November 4, 2007 I have what sounds like the same problem........pretty much had everything checked apart from the vsv actuators themselves. I'm getting these checked ina couple of weeks. How do i re plumb the car to run in TTC mode when i have the avcr boost controller fitted. Does anyone have any diagrams?? This would possibly help to diagnose the source of the problem. Very interested to see how u guys get on with this problem. Quote Link to comment Share on other sites More sharing options...
Sean1933 Posted November 4, 2007 Share Posted November 4, 2007 I have what sounds like the same problem........pretty much had everything checked apart from the vsv actuators themselves. I'm getting these checked ina couple of weeks. How do i re plumb the car to run in TTC mode when i have the avcr boost controller fitted. Does anyone have any diagrams?? This would possibly help to diagnose the source of the problem. Very interested to see how u guys get on with this problem. Its easy mate, there is a thread somewhere with pics i think. Basically you just bypass the IACV + EGCV vsv's so the actuators are always opened. See this first pic, at the top left you can see the IACV actuator and vsv. The vacuum pipe goes to the vsv then to the actuator, all you have to do is bypass the vsv. The EGCV actuator is shown in the next pic, just follow the actuator hose to the vsv thats mounted to the hanger on the front of the first turbo (cant find a good pic of it, sorry). Just bypass it as you did with the first vsv. Hope that helps. Quote Link to comment Share on other sites More sharing options...
Cass Posted November 5, 2007 Share Posted November 5, 2007 This is easier to follow http://mkiv.supras.org.nz/articles/andy.htm Quote Link to comment Share on other sites More sharing options...
tucky40 Posted November 5, 2007 Share Posted November 5, 2007 Great thanks guys........i remember looking at the egcv piping and it looked like the egcv vsv had already been bypassed and blumbed directly to the boost controller which confused me. Any advice on this? I'll check when i get home. Quote Link to comment Share on other sites More sharing options...
Sean1933 Posted November 5, 2007 Share Posted November 5, 2007 Good find Cass, although i spent ages writing that up Tucky, it sounds like your getting confused between the wastegate vsv and EGCV vsv, they are right next to each other on that hanger. The EGCB vsv is on the left (if your facing the engine straight on). Quote Link to comment Share on other sites More sharing options...
tucky40 Posted November 5, 2007 Share Posted November 5, 2007 ahhhh ok sean. ill take a closer look when i get home!! Quote Link to comment Share on other sites More sharing options...
Suprasteve Posted November 6, 2007 Share Posted November 6, 2007 Its easy mate, there is a thread somewhere with pics i think. Basically you just bypass the IACV + EGCV vsv's so the actuators are always opened. See this first pic, at the top left you can see the IACV actuator and vsv. The vacuum pipe goes to the vsv then to the actuator, all you have to do is bypass the vsv. http://www.mkivsupra.net/vbb/attachment.php?attachmentid=13940&d=1112558977 The EGCV actuator is shown in the next pic, just follow the actuator hose to the vsv thats mounted to the hanger on the front of the first turbo (cant find a good pic of it, sorry). Just bypass it as you did with the first vsv. Hope that helps. http://www.mkivsupra.net/vbb/attachment.php?attachmentid=13944&d=1112559002 thats a wealth of knowledge and should be put in the techy section. Quote Link to comment Share on other sites More sharing options...
supra_surj Posted November 10, 2007 Author Share Posted November 10, 2007 Ok guys i checked the plugs and seem ok. Checked the coil pack connectors and they also seem fine. Tried the TTC mode and 2nd turbo works just like it should so that narrows the problem down. HOWEVER ive been driving around all afternoon and quite enjoy the TTC mode. The sound from the exhaust is lovely! Also the fuel consumption reduced loads. So might keep it this way for a while. If running in TTC mode, the vacuum hoses ive taken off, do i block the parts that are left exposed? Surj Quote Link to comment Share on other sites More sharing options...
Steve Posted November 10, 2007 Share Posted November 10, 2007 I would block them mate. It will stop any dirt getting where it shouldnt. Quote Link to comment Share on other sites More sharing options...
supra_surj Posted November 10, 2007 Author Share Posted November 10, 2007 Would duck tape do? Quote Link to comment Share on other sites More sharing options...
japone Posted November 10, 2007 Share Posted November 10, 2007 hi where do you get the error codes from Quote Link to comment Share on other sites More sharing options...
Steve Posted November 10, 2007 Share Posted November 10, 2007 Would duck tape do? Erm, i suppose. Quote Link to comment Share on other sites More sharing options...
Steve Posted November 10, 2007 Share Posted November 10, 2007 hi where do you get the error codes from Hold your mouse over the words error codes and follow the link Quote Link to comment Share on other sites More sharing options...
Sean1933 Posted November 11, 2007 Share Posted November 11, 2007 Ok guys i checked the plugs and seem ok. Checked the coil pack connectors and they also seem fine. Tried the TTC mode and 2nd turbo works just like it should so that narrows the problem down. HOWEVER ive been driving around all afternoon and quite enjoy the TTC mode. The sound from the exhaust is lovely! Also the fuel consumption reduced loads. So might keep it this way for a while. If running in TTC mode, the vacuum hoses ive taken off, do i block the parts that are left exposed? Surj I had a feeling that may be the case, i loved TTC mode! (going single now ). Ideally i would block the vsv connector holes not being used with the bit of vacuum pipe you took off when bypassing them, just loop it over. Quote Link to comment Share on other sites More sharing options...
supra_surj Posted November 11, 2007 Author Share Posted November 11, 2007 Thats a good idea mate. I will use that small bit of tubing and connect those 2 bits. Ttc is great. Going bpu soon after janurary so will get all the fuelling and that checked then. Does this mean i needed new vsv's or something? Quote Link to comment Share on other sites More sharing options...
Sean1933 Posted November 11, 2007 Share Posted November 11, 2007 Seems that way mate, probably got an intermittent fault with one of them. Glad you like it! If you need a hand with the fuelling let me know Quote Link to comment Share on other sites More sharing options...
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